Page 1 Grove GRT8120 Operator Manual...
Page 2 WARNING California Proposition 65 Breathing diesel engine exhaust exposes you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. • Always start and operate the engine in a well-ventilated area. • If in an enclosed area, vent the exhaust to the outside.
Page 3 OPERATOR MANUAL This manual has been prepared for and is considered part of - GRT8120 Crane Model Number This Manual is divided into the following sections: SECTION 1 INTRODUCTION SECTION 2 SAFETY INFORMATION SECTION 3 OPERATING CONTROLS AND FEATURES SECTION 4 OPERATING PROCEDURES SECTION 5 SET-UP AND INSTALLATION...
Page 4 THIS PAGE BLANK...
Page 5: Table Of Contents
GRT8120 TABLE OF CONTENTS TABLE OF CONTENTS SECTION 1 ........Introduction General .
Page 6 TABLE OF CONTENTS GRT8120 Example and Sample Calculations (Non-metric) ..... . 2-18 Lifting Operations..........2-20 Multiple Crane Lifts .
Page 7 GRT8120 TABLE OF CONTENTS SECTION 3 ..... Operating Controls and Features Operator Cab Overview ..........3-3 Steering Wheel and Column .
Page 8 TABLE OF CONTENTS GRT8120 Horn Button ............3-22 Hoist Speed Toggle Switches .
Page 9 GRT8120 TABLE OF CONTENTS Counterweight Removal Control Pads ........3-40 Right Counterweight Cylinder Raise Button .
Page 10 TABLE OF CONTENTS GRT8120 Hook Block and Overhaul Ball ......... 4-4 Seats and Mirrors .
Page 11 GRT8120 TABLE OF CONTENTS Four Wheel Steering ..........4-17 Crab Steering .
Page 12 TABLE OF CONTENTS GRT8120 Raising the Auxiliary Hoist Rope ........4-49 Selecting the Hoist Speed Range .
Page 13 GRT8120 TABLE OF CONTENTS Boom Position Indicator Light ........4-153 Exhaust System Cleaning (If Equipped) .
Page 14 TABLE OF CONTENTS GRT8120 Possible Reeving Combinations ........5-13 5-sheave hook block .
Page 15 GRT8120 TABLE OF CONTENTS Installing Auxiliary Single-Sheave Boom Nose ......5-60 Removing the Auxiliary Single-Sheave Boom Nose ....5-61 Rigging the Auxiliary Single-Sheave Boom Nose .
Page 16 TABLE OF CONTENTS GRT8120 THIS PAGE BLANK A-12...
Page 17: Section 1
GRT8120 OPERATOR MANUAL INTRODUCTION SECTION 1 INTRODUCTION SECTION CONTENTS General ........1-1 Torque Converter .
Page 18: Customer Support
If you are the new owner of a Grove crane, please register it MEGAFORM™ boom with TWIN-LOCK™ boom pinning with Manitowoc Crane Care so we have the ability to contact system. Additional reach is obtained by utilizing an optional you if the need arises.
Page 19: Noise/Vibration Test Results
Directive 2006/42/EC. The guaranteed sound power level at the crane operator position is 80 dB(A) as measured by When contacting your local Grove distributor or Manitowoc Annex G.1 of EN 13000:2010+A1:2014. Crane Care, have the crane serial number available.
Page 20: Grt8120 Crane Components
INTRODUCTION GRT8120 OPERATOR MANUAL GRT8120 CRANE COMPONENTS 10086-1 10086-2 FIGURE 1-2 Published 3-22-2021, Control # 702-02...
Page 21 GRT8120 OPERATOR MANUAL INTRODUCTION Item Description Item Description Exhaust Aftertreatment Boom Nose Sheaves Boom Battery and Control Module Compartment Work Lights Battery Disconnect Switch Fuel Tank* Air Conditioning Condenser Superstructure Valve Covers Main Hoist Boom Extension Sheaves Auxiliary Hoist Boom Extension Fly Section Counterweight Boom Extension Base Section Tailpipe...
Page 22: List Of Specifications
INTRODUCTION GRT8120 OPERATOR MANUAL LIST OF SPECIFICATIONS Transmission Gear Ratios — Forward and Reverse General Low Range 1st ......12.59:1 Model .
Page 23: Wheels And Tires
GRT8120 OPERATOR MANUAL INTRODUCTION Wheels and Tires Swing Gearbox Lugs per Wheel ......24 Reduction Ratio ..... . . 35.2:1 Torque .
Page 24 INTRODUCTION GRT8120 OPERATOR MANUAL THIS PAGE BLANK Published 3-22-2021, Control # 702-02...
Page 25: Section 2
GRT8120 OPERATOR MANUAL SAFETY INFORMATION SECTION 2 SAFETY INFORMATION SECTION CONTENTS Safety Messages ......2-2 Environmental Protection.
Page 26: Safety Messages
The crane must not be returned to service until it is thoroughly inspected for any evidence of damage. All damaged parts must be repaired or replaced as authorized by your Grove distributor and/or Manitowoc Crane Care. Published 3-22-2021, Control # 702-02...
Page 27: Operator Information
Fax: 717-593-5152 maintenance and repair of the crane. E-mail: product.safety@manitowoc.com OPERATOR QUALIFICATIONS OPERATOR INFORMATION Qualified person is defined as one who by reason of You must read and understand this Operator Manual and knowledge, training and experience is thoroughly familiar the Load Chart before operating your new crane.
Page 28: Operational Aids
SAFETY INFORMATION GRT8120 OPERATOR MANUAL An untrained operator subjects himself and others to death assure that repair or recalibration is accomplished as soon or serious injury. as is reasonably possible. If immediate repair or recalibration of an operational aid is not possible and there are You must not operate this crane unless: exceptional circumstances which justify continued short-term use of the crane when operational aids are inoperative or...
Page 29: Anti-Two-Blocking Device
GRT8120 OPERATOR MANUAL SAFETY INFORMATION upon these electronic aids in place of good operating Two-blocking can be prevented. Operator awareness of the practices can cause an accident. hazards of two-blocking is the most important factor in preventing this condition. An Anti-Two-Block System is Know the weight of all loads and always check the capacity intended to assist the operator in preventing dangerous two- of the crane as shown on the Load Chart before making...
Page 30: Crane Stability/Structural Strength
SAFETY INFORMATION GRT8120 OPERATOR MANUAL CRANE STABILITY/STRUCTURAL Before swinging the superstructure over the side when the outriggers are retracted, check for backwards stability under STRENGTH the sub-section titled Model Specific Information later in this To avoid death or serious injury, make sure that the crane is section.
Page 31: Load Charts
GRT8120 OPERATOR MANUAL SAFETY INFORMATION Work Site Prior to any operation, you must inspect the entire work site, including ground conditions, where the crane will travel and operate. Make sure that the surfaces will support a load greater than the crane’s weight and maximum capacity. Be aware of all conditions that could adversely effect the stability of the crane.
Page 32: Wind Speeds
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Table 2-1 Beaufort Wind Scale Maximum Wind Speed Beaufort Visible Indicator Description km/h Number Effects of wind as observed on land Zero (0) Calm Calm; smoke rises vertically Smoke drift indicates wind direction. Leaves and wind vanes Light Air are stationary.
Page 33 GRT8120 OPERATOR MANUAL SAFETY INFORMATION Simplified Method to Determine Maximum Permissible Wind Speed Determine 3-Second Gust 0.14 V(z) = [(z/10) + 0.4]v [m/s] Wind Speed at boom tip, 0.14 V(z) = [(z/33) + 0.4]v [mph] V(z) 13.4 m/s < V(z) < 20.1 m/s V(z) >...
Page 34: Determination Of 3-Second Wind Gust Speed At Boom Tip Height
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Determination of 3-second wind gust speed at boom Size and Shape of the load: tip height: These rated capacities are also based on the assumption that the Wind Resistance Area of load, Awr is not more The following example illustrates how to calculate 3-second (load) wind gust speed at boom tip height based on mean wind...
Page 35: Determining Wind Drag Coefficient (Cd)
GRT8120 OPERATOR MANUAL SAFETY INFORMATION Calculation of Projected Wind Area (Ap) Wind Wind = 8 m = 24 m 25 ft 25 ft Wind Wind 10 ft 3 ft = 75 ft = 250 ft 10 ft 3 ft 8384-1 FIGURE 2-2 Determining Wind Drag Coefficient (Cd) Table 2-2 shows the typical Shapes and corresponding Wind...
Page 36: Maximum Permissible Wind Speed
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Table 2-2 Wind Drag Coefficient Shape 1.1 to 2.0 0.3 to 0.4 0.6 to 1.0 0.8 to 1.2 0.2 to 0.3 0.05 to 0.1 Turbine Blade or Complete Rotor Approximately 1.6 8384-2 Maximum Permissible Wind Speed If the wind resistant area of the load Awr is greater than (load)
Page 37 GRT8120 OPERATOR MANUAL SAFETY INFORMATION Rated Load Chart Example - Metric 8383-1 FIGURE 2-3 Grove 2-13 Published 3-22-2021, Control # 702-02...
Page 38 SAFETY INFORMATION GRT8120 OPERATOR MANUAL Table 2-4 Example-Capacity Reduction Factors for Wind Speed V(z) Greater than 13.4 m/s - Metric (Only for lifting with main boom on fully extended outriggers, with or without stowed extension) For wind speed V(z) (3-second gust speed at boom tip height) V(z) > 13.4 m/s ≤ 20.1 m/s, the Reduced Capacity shall be calculated by multiplying the Published Rated Capacity by the following factors: Main Boom Length in Meters Wind Speed...
Page 39 GRT8120 OPERATOR MANUAL SAFETY INFORMATION At wind speeds greater than 13.4 m/s, it is not permissible to Load example 1.3a: lift a load greater than 12,040 kg, even if the wind resistance With large wind resistance area of the load Awr (load) area of the load is less than 14.45 m •...
Page 40 SAFETY INFORMATION GRT8120 OPERATOR MANUAL Refer to the above Lifting Limits at wind speed V(z) Ratio = 1.37 > 13.4 m/s and ≤ 20.1 m/s. Comparing the load and wind resistant area to the allowable: From Table 2-5, the maximum permissible wind speed at •...
Page 41 GRT8120 OPERATOR MANUAL SAFETY INFORMATION Rated Load Chart Example - Non-metric 8382-1 FIGURE 2-4 Grove 2-17 Published 3-22-2021, Control # 702-02...
Page 42: Example And Sample Calculations (Non-Metric)
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Table 2-6 Example-Capacity Reduction Factors for Wind Speed V(z) Greater than 30 mph - Non-metric (Only for lifting with main boom on fully extended outriggers, with or without stowed extension) For wind speed Vz (3-second gust speed at boom tip height) is greater > 30> mph ≤ 45 mph, the Reduced Capacity shall be calculated by multiplying the Published Rated Capacity by the following factors: Main Boom Length in Feet Wind Speed...
Page 43 GRT8120 OPERATOR MANUAL SAFETY INFORMATION Example, wind speeds greater than 13.4 m/s is NOT Load example 2.3a: permissible to lift a load greater than 20,160 lb, even if the With large wind resistance area of the load Awr (load) wind resistance area of the load is less than 119 ft •...
Page 44: Lifting Operations
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Refer to the above Lifting Limits at wind speed V(z) Do not overload the crane by exceeding the capacities > 30 mph and ≤ 45 mph. Comparing the load and wind shown on the appropriate Load Chart. Death or serious resistant area to the allowable: injury could result from the crane tipping over or failing structurally from overload.
Page 45: Multiple Crane Lifts
GRT8120 OPERATOR MANUAL SAFETY INFORMATION Multiple Crane Lifts 1926.753(e)(2) Components of the multiple lift rigging assembly shall be specifically designed and assembled with Multiple crane lifts are not recommended. a maximum capacity for total assembly and for each individual attachment point. This capacity, certified by the Any lift that requires more than one crane must be precisely manufacturer or a qualified rigger, shall be based on the planned and coordinated by a qualified person.
Page 46: Counterweight
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Outrigger Lift Off • The anti-two-block system shall be installed and inspected to confirm that it is active to monitor both hoist Regarding “lifting” of an outrigger pad during craning lines. activities, be advised that the rated loads for these cranes, •...
Page 47: Crane Equipment
GRT8120 OPERATOR MANUAL SAFETY INFORMATION • The combined weight of the driver or extractor, piling, showing inspections were performed on the crane leads, attachments, etc., shall not exceed 80% of the during the time it was used for pile driving or extraction. published load chart values for on-outriggers operation.
Page 48: Set-Up And Operation
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Crane operation is dangerous when close to an energized The safest way to avoid electrocution is to stay away from electrical power source. Exercise extreme caution and electrical power lines and electrical power sources. prudent judgement. Operate slowly and cautiously when in It is not always necessary to contact a power line or power the vicinity of power lines.
Page 49: Electrocution Hazard Devices
GRT8120 OPERATOR MANUAL SAFETY INFORMATION boom nose and a small portion of the boom. Performance of boom cages and boom guards is limited by their physical size, insulating characteristics, and operating environment (e.g. dust, dirt, moisture, etc.). The insulating characteristics of these devices can be compromised if not kept clean, free of contamination, and undamaged.
Page 50: Special Operating Conditions And Equipment
Thoroughly inspect the hoist rope and all points of stations, etc.) contact on the crane. Should the distributor not be immediately available, contact Manitowoc Crane Care. The • Near high-frequency switching stations crane must not be returned to service until it is thoroughly •...
Page 51: Personnel Handling
GRT8120 OPERATOR MANUAL SAFETY INFORMATION PERSONNEL HANDLING • The crane operator and occupants have been instructed in the recognized hazards of personnel platform lifts. The American Society of Mechanical Engineers published • The crane is in proper working order. the American National Standard entitled, Personnel Lifting Systems, ASME B30.23: •...
Page 52: Environmental Protection
SAFETY INFORMATION GRT8120 OPERATOR MANUAL The following standards and regulations regarding personnel Always perform a function check after repairs have been handling are available by mail at the following addresses: made to ensure proper operation. Load tests should be performed when structural or lifting members are involved. •...
Page 53: Moving Parts
To relieve hydraulic pressure, stop the engine, turn the ignition switch to RUN and move the • Consult with Manitowoc Crane Care to determine if load hydraulic controls in both directions several times. testing is required after a structural repair is performed.
Page 54: Hoist Rope
Hoist rope may be purchased by contacting • If an operator hoists the hook block up or down too fast Manitowoc Crane Care. when reeved with multiple parts of line and no hook load, the wire rope can bird cage and damage the rope.
Page 55 GRT8120 OPERATOR MANUAL SAFETY INFORMATION ASME and similar organizations. See the Service Broken wires; number and location. Manual for inspection procedures. Reduction in diameter. When inspecting ropes and attachments, keep all parts Rope stretch (elongation). of your body and clothing away from rotating hoist drums and all rotating sheaves.
Page 56: Sheaves
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Batteries When using a wedge socket • Always inspect socket, wedge, and pin for correct size Battery electrolyte must not be allowed to contact the skin or and condition. eyes. If this occurs, flush the contacted area with water and consult a doctor immediately.
Page 57: General Maintenance
GRT8120 OPERATOR MANUAL SAFETY INFORMATION Remove the ECM power fuse. Remove negative battery cables. Remove positive capacitor cable. • Do not short across the capacitor posts to check charge. Short circuit will cause capacitor terminal damage. Spark or flame could cause capacitor explosion. •...
Page 58 SAFETY INFORMATION GRT8120 OPERATOR MANUAL Never back up without the aid of a signal person to verify the area behind the crane is clear of obstructions and/or personnel. WARNING Crushing Hazard! On cranes equipped with mirrors or camera systems, make sure these components are in working order and are Death or serious injury could result from being crushed by properly adjusted.
Page 59: Work Practices
GRT8120 OPERATOR MANUAL SAFETY INFORMATION Slopes Do not walk on a surface if slip-resistant material is missing or excessively worn. Pick and carry on level surfaces only. Do not use the top of the boom as a walkway. Refer to the Operation Section for more detailed information on traveling on slopes.
Page 60: Working
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Working Operate the crane only from the operator’s seat. Do not reach in a window or door to operate any controls. Operator shall be responsible for all operations under his/her Operate the crane slowly and cautiously, looking carefully in direct control.
Page 61: Hand Signals
GRT8120 OPERATOR MANUAL SAFETY INFORMATION Make sure good rigging practices are being used. Refuse to Do not subject crane to side loading. A side load can tip the use any poorly maintained or damaged equipment. Never crane or cause it to fail structurally. wrap the hoist cable around a load.
Page 62 SAFETY INFORMATION GRT8120 OPERATOR MANUAL Reprinted from ASME B30.5-2014, by permission of The American Society of Mechanical Engineers. All Rights Reserved. FIGURE 2-10 2-38 Published 3-22-2021, Control # 702-02...
Page 63: Boom Extension
GRT8120 OPERATOR MANUAL SAFETY INFORMATION BOOM EXTENSION that it is not practical to lower the boom to the ground, we recommend the following additional instructions be followed: To avoid death or serious injury, follow the procedures in this • The crane should be left in the smallest, most stable, m a n u a l d u r i n g e r e c t i o n , s t o w a g e , a n d u s e o f t h e valid operational configuration that the job site boom extension.
Page 64: Temperature Effects On Hook Blocks
SAFETY INFORMATION GRT8120 OPERATOR MANUAL TEMPERATURE EFFECTS ON HOOK caution handling and operating these components in sub- zero temperatures, avoiding shock loading. BLOCKS In freezing weather, park the crane in an area where it The Hook Block Working Load Limit (WLL) is valid between cannot become frozen to the ground.
Page 65: Temperature Effects On Hydraulic Cylinders
GRT8120 OPERATOR MANUAL SAFETY INFORMATION TEMPERATURE EFFECTS ON HYDRAULIC movement of the boom may be undetected by the operator unless a load is suspended for a long period of time. To CYLINDERS minimize the effects of thermal contraction or “Stick-slip” it is Hydraulic oil expands when heated and contracts when recommended that the telescope control lever is activated cooled.
Page 66 SAFETY INFORMATION GRT8120 OPERATOR MANUAL Table 2-8: Boom Drift Chart (Cylinder length change in inches) Coeff. = 0.00043 (in / °F) STROKE Temperature Change (°F) (FT.) 0.26 0.52 0.77 1.03 1.29 1.55 1.81 2.06 2.32 2.58 0.52 1.03 1.55 2.06 2.58 3.10 3.61...
Page 67: Crane Stability
50%. No storage of components are allowed on the platform. • Stop operating the crane and contact Manitowoc Only one person at a time is allowed on the platform. Crane Care immediately for overloads of 50% and higher.
Page 68: Boom Inspection
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Boom Inspection 9, 10 3, 4 9, 10 Illustration for reference only. Your crane may be different. 2-44 Published 3-22-2021, Control # 702-02...
Page 69 GRT8120 OPERATOR MANUAL SAFETY INFORMATION NOTE: The following checklist includes all features that can be found on Grove cranes. Your crane may not have some features. Overload less than 25% Sheaves Inspect all for damage. Boom Extension Offset Inspect for damage/leaks. Mechanism/ Cylinder Collar-wear...
Page 70: Superstructure Inspection
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Superstructure Inspection 9, 10 Illustration for reference only. Your crane may be different. 2-46 Published 3-22-2021, Control # 702-02...
Page 71 GRT8120 OPERATOR MANUAL SAFETY INFORMATION NOTE: The following checklist includes all features that can be found on Grove cranes. Your crane may not have some features. Overload less than 25% Lift Cylinder Inspect for leaking. Turntable See topic in Swing section of Check bolts for proper torque.
Page 72: Carrier Inspection
SAFETY INFORMATION GRT8120 OPERATOR MANUAL Carrier Inspection 5, 6 Illustration for reference only. Your crane may be different. 2-48 Published 3-22-2021, Control # 702-02...
Page 73 GRT8120 OPERATOR MANUAL SAFETY INFORMATION NOTE: The following checklist includes all features that can be found on Grove cranes. Your crane may not have some features. Overload less than 25% Jack Cylinders Inspect for leaking. Outrigger Inspect for deformation and/or cracked welds. Pads Overload from 25% to 49% Jack Cylinders Inspect for leaking.
Page 74 SAFETY INFORMATION GRT8120 OPERATOR MANUAL THIS PAGE BLANK 2-50 Published 3-22-2021, Control # 702-02...
Page 75 GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES SECTION 3 OPERATING CONTROLS AND FEATURES SECTION CONTENTS Operator Cab Overview......3-3 USB Diagnostic Connector .
Page 76 OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Main Hoist Controller ......3-28 Right Counterweight Cylinder Lower Button..3-41 Bridging Switch (CE Certified Cranes) .
Page 77: Operator Cab Overview
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES OPERATOR CAB OVERVIEW Most of the controls and indicators that are used to operate and monitor crane functions are found inside the operator cab (Figure 3-1). 9838-29 Item Description Page Item Description Page Steering Wheel and Column Operator Seat and Armrest Controls 3-20...
Page 78: Steering Wheel And Column
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL STEERING WHEEL AND COLUMN The steering wheel and column assembly is a pedestal style tilt and telescoping steering column. It can tilt rearward 30° or telescope 60 mm (2.3 in). The steering column includes the ignition switch as well as levers and switches for operating the crane (Figure 3-2).
Page 79: Steering Wheel
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Steering Wheel NOTE: Parking brake must be applied before outriggers can be operated. The Steering Wheel (1, Figure 3-2) is used to turn the wheels on the front axle. Headlights Switch With the boom centered over the front axle, turning the The Headlights Switch (4, Figure 3-2) is located on the front steering wheel counterclockwise turns the wheels on the of the steering column.
Page 80: Hazard Lights Switch
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Hazard Lights Switch NOTE: The transmission will not shift into forward or reverse gear without first pushing and holding the The Hazard Lights Switch (6, Figure 3-2) is located on the Service Brake Pedal. Refer to Traveling — front of the steering column.
Page 81: Right Overhead Control Panel
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES RIGHT OVERHEAD CONTROL PANEL The right overhead control panel (Figure 3-3) includes controls for operating the heating and air conditioning system, front and skylight window wipers, engine, and craning functions. 9838-30 Item Description Page Item Description...
Page 82: Heater/Air Conditioner Fan Speed Switch
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Heater/Air Conditioner Fan Speed Switch Push top of the switch to cause the lights to come on. Push bottom of switch to cause the lights to go off. The Heater/Air Conditioner Fan Speed Switch (1, Figure 3-3) is located on the right overhead control panel.
Page 83: Engine Wait-To-Start Indicator
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Push and hold top of switch to incrementally increase engine Unit, page 4-50 for information pertaining to the operation of speed. Push and hold bottom of switch to incrementally the Remote Control Unit. decrease engine speed.
Page 84: Momentary Limit Bypass Switch (Non-Ce Certified Cranes)
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Momentary Limit Bypass Switch (Non-CE • Carrier Avoidance System Certified Cranes) • -29°C Temperature Limiter System (optional) The following indicators come on to indicate the limiters are bypassed: WARNING • Bypass 1 Pressed Indicator is on (Figure 4-206) Overload Hazard! •...
Page 85: Boom Up Bypass Switch
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Push and release bottom of rocker switch to bypass the • Bypass 1 Pressed Indicator (Figure 4-206) is on RCL following limiter systems and their crane function lockouts: Bypass Active Indicator (Figure 4-206) is on •...
Page 86: Emergency Stop Button
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Emergency Stop Button Cab Dome Light The Emergency Stop Button (15, Figure 3-3) is located on The Cab Dome Light (16, Figure 3-3) is located on the right the right overhead control panel. overhead control panel.
Page 87: Left Overhead And Side Panel
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES LEFT OVERHEAD AND SIDE PANEL The left overhead and side panel (Figure 3-4) includes a coat hook, USB charging ports, auxiliary light, cell phone holder, and heater/air conditioner vents. 9838-8 Item Description Page Coat Hook 3-14 USB Charging Ports...
Page 88: Coat Hook
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Coat Hook The auxiliary light switch is a two-position switch. Push top of switch to cause the light to come on. Push A Coat Hook (1, Figure 3-4) is located on the left overhead bottom of switch to cause the light to go off.
Page 89: Right Lower Control Panel
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES RIGHT LOWER CONTROL PANEL The right lower control panel (Figure 3-5) includes the turntable swing lock pin control handle, 12-volt outlet, and on-board diagnostic (OBD) connector. 9838-9 Item Description Page Turntable Swing Lock Pin Control Handle 3-16 12-Volt Outlet 3-16...
Page 90: Turntable Swing Lock Pin Control Handle
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Turntable Swing Lock Pin Control Handle NOTE: Before driving the crane, always make sure that the boom is centered over the front or rear of the The Turntable Swing Lock Pin Control Handle (1, Figure 3-5) carrier, and that the turntable swing lock pin is is located on the right lower control panel.
Page 91: Rated Capacity Limiter Display Module And Operator Display Module
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES RATED CAPACITY LIMITER DISPLAY Each module consists of a display screen, navigation control pad, warning indicators, screen brightness sensor, and USB MODULE AND OPERATOR DISPLAY diagnostic connector. MODULE The Rated Capacity Limiter Display Module (RDM) and the Operator Display Module (ODM) (Figure 3-6) are located to the right of the steering column.
Page 92: Rated Capacity Limiter Display Module (Rdm)
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Rated Capacity Limiter Display Module (RDM) The Rated Capacity Limiter Display Module (RDM) (1, Figure 3-6) allows the operator to easily program the RCL by entering a code number from the Load Chart Manual or by using the RCL setup screen.
Page 93: Usb Diagnostic Connector
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES USB Diagnostic Connector Anti-Two-Block (A2B) Indicator The RDM and ODM each have a USB Diagnostic Connector The Anti-Two-Block Indicator (7, Figure 3-6) is located (4, Figure 3-6) located immediately below and to the left of its immediately below and to the right of the ODM screen.
Page 94: Operator Seat And Armrest Controls (Dual Axis)
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL OPERATOR SEAT AND ARMREST CONTROLS (DUAL AXIS) The operator seat and armrest controls (Figure 3-9) include most of the controls for performing craning operations. Not shown 9838-11a FIGURE 3-9 3-20 Published 3-22-2021, Control # 702-02...
Page 95 GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Item Description Page Item Description Page Cup Holder 3-22 Cab Tilt Switch 3-23 Boom Lift - Main Hoist - Telescope - 3-22 Swing Enable/Disable Switch 3-24 Luffing Jib Controller (Dual Axis) Deadman Switches (Optional) (Dual Axis) 3-22 Outrigger Extend/Retract Switch 3-24...
Page 96: Cup Holder
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Cup Holder Hoist Speed Toggle Switches The adjustable Cup Holder (1, Figure 3-9) is attached to the The Hoist Speed Toggle Switches (5, Figure 3-9) are thumb front of the right armrest. operated three-position center spring return switches located on top of each controller.
Page 97: Luffing Jib Enable/Disable Switch (Optional)
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES speed to increase to 950 rpm. Disabling all craning functions Rotate lever clockwise to increase the lumbar support. will cause the engine speed to decrease to 800 rpm. Rotate lever counterclockwise to reduce the lumbar support. Luffing Jib Enable/Disable Switch (Optional) Seat Slide Lever The Luffing Jib Enable/Disable Switch (9, Figure 3-9)
Page 98: Swing Enable/Disable Switch
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Swing Enable/Disable Switch The Differential Lock Alert in the Alerts Area (Figure 4-68) of the Operating Display Module (ODM) comes on (amber) The Swing Enable/Disable Switch (16, Figure 3-9) is a when the differential lock is engaged. momentary switch that is located on the left armrest.
Page 99: Swing Brake Release Button
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Swing/Telescope or Swing/Auxiliary Hoist Controller (Dual Axis) The Swing/Telescope or Swing/Auxiliary Hoist Controller (21, Figure 3-9) is located on the left armrest. The controller operates the swing and telescope functions Direction when crane is not equipped with an auxiliary hoist. of Travel When equipped with an auxiliary hoist, the controller operates the swing and auxiliary hoist functions.
Page 100: Armrest Adjustment Buttons
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Seat Heat Switch (Optional) The Seat Heat Switch (25, Figure 3-9) is a three-position, rocker type switch located at the front of the seat cushion. Push bottom of switch to cause seat heater to operate at a low temperature.
Page 101: Optional Single Axis Controllers
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES OPTIONAL SINGLE AXIS CONTROLLERS The following single axis controllers (Figure 3-13) are available as an option on the GRT8120 crane. 9838-28 Item Description Page Swing Controller 3-28 Telescope or Auxiliary Hoist Controller 3-28 Boom Lift –...
Page 102: Swing Controller
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Swing Controller When Telescope function is enabled, push controller forward to extend the boom. Pull controller rearward to retract the The Swing Controller (1, Figure 3-13) is located on the left boom. armrest. When crane is equipped with an optional luffing boom Push controller forward to cause the superstructure to rotate extension, the luffing boom extension function is also...
Page 103: Foot Pedal Controls And Floor Mat
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES FOOT PEDAL CONTROLS AND FLOOR MAT The foot pedal controls (Figure 3-14) include the swing brake pedal, service brake pedal, and throttle pedal. 9838-13 Item Description Page Swing Brake Pedal 3-30 Service Brake Pedal 3-30 Throttle Pedal 3-30...
Page 104: Swing Brake Pedal
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Swing Brake Pedal Throttle Pedal The Swing Brake Pedal (1, Figure 3-14) is located on the left The Throttle Pedal (3, Figure 3-14) is located on the right side of the cab floor. side of the floor.
Page 105: Internal Rated Capacity Limiter Light Bar
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES INTERNAL RATED CAPACITY LIMITER LIGHT BAR The Rated Capacity Limiter (RCL) Internal Light Bar (Figure 3-15) is located at the upper left corner of the crane cab. The RCL Internal Light Bar is an operational aid that works with the RCL system to warn the operator of an approaching overload condition that could cause equipment damage, personal injury, or death.
Page 106: Controls And Features At Front Of Cab
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL CONTROLS AND FEATURES AT FRONT OF Controls and features located at the front of the cab (Figure 3-16) include the front windshield/emergency exit, sun visor, grab handles, and foot rests. 9838-31 Item Description Page Front Windshield/Emergency Exit 3-33...
Page 107: Front Windshield/Emergency Exit
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Front Windshield/Emergency Exit Grab Handles The Front Windshield is the Emergency Exit (1, Figure 3-16). Grab Handles (3, Figure 3-16) are located around the entrance to the cab to help with entering and exiting the cab. In an emergency, if the door is blocked or cannot be opened, push out windshield and escape through opening.
Page 108: Controls And Features At Rear Of Cab
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL CONTROLS AND FEATURES AT REAR OF Controls and features located at rear of the cab (Figure 3-17) include the radio, fan, fire extinguisher, user manual holder, fuse and relay panel, and limit bypass switch for non-CE certified cranes.
Page 109: Radio (Optional)
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Radio (Optional) An AM/FM Radio (1, Figure 3-17), optional equipment, is The Cab Circulating Fan (4, Figure 3-17) is located at the located at the upper left rear (as seated in the operator seat) right rear side of the cab.
Page 110: Fuse And Relay Panel - Cab
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Fuse and Relay Panel – Cab The Fuse and Relay Panel (7, Figure 3-17) is located behind the operator seat in the right side upper compartment. The cab fuse and relay panel contains the fuses and relays listed in Figure 3-18.
Page 111: Buzzer
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Buzzer The Rear Maintained Limit Bypass Switch (9, Figure 3-17) is a two-position, maintained type key switch located behind The buzzer (8, Figure 3-17) comes on when one or more of the operator seat. the following conditions exist: During maintenance or troubleshooting work, or to recover •...
Page 112: Right Window And Skylight Window
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL RIGHT WINDOW AND SKYLIGHT WINDOW The right window and skylight window (Figure 3-19) can be opened for ventilation. The skylight sun shade can be adjusted to multiple positions to allow varying amounts of light into the cab.
Page 113: Skylight Window Latch (If Equipped)
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Skylight Window Latch (If Equipped) The sun shade is self-retracting, and can be set to screen all sunlight coming into the cab. The sun shade can also be The Skylight Window Latch (1, Figure 3-19) is located at the adjusted to reduce sunlight in the cab by moving it rearward front of the window.
Page 114: Controls And Features External To The Cab
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL CONTROLS AND FEATURES EXTERNAL TO • Red LED (right position) indicates the requested function is not available or the counterweight removal THE CAB system is not enabled Counterweight Removal Control Pads The Counterweight (2, Figure 3-20) is removed and installed using hydraulic cylinders controlled by a counterweight control panel located on each side of the superstructure.
Page 115: Lock Cylinder Retract Button
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Lock Cylinder Retract Button Horn Button The Lock Cylinder Retract Button (3, Figure 3-21) must be The Horn Button (6, Figure 3-21) is always active and can be pushed and held to retract the lock cylinder holding the pushed at any time without first pushing the Keypad Enable counterweight.
Page 116: Bridging Switch (Ce Certified Cranes)
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Bridging Switch (CE Certified Cranes) • RCL Bypass Active Indicator is on (Figure 4-206) • Working Range Limiter (WRL) Indicator (Figure 4-71) WARNING • Low Boom Angle Indicator is flashing (Figure 4-68) Overload Hazard! Upon pushing the Bridging Switch, the swing left/right function pressure is reduced to 25%.
Page 117: External Rcl Light Tower (Optional)
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES External RCL Light Tower (Optional) Strobe Light or Beacon The optional External Rated Capacity Limiter (RCL) Light The standard Strobe Light or Beacon (1, Figure 3-24) is Tower (1, Figure 3-23) is located on the outside upper right located at the right side of the superstructure.
Page 118: 120V/240V Engine Block Heater And Outlet
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL 120V/240V Engine Block Heater and Outlet Emergency Stop Buttons (Optional) The crane is equipped with a 120V engine block heater for The optional Emergency Stop Buttons (1, Figure 3-26) are cold weather operation. located on the left and right sides of the carrier.
Page 119: Battery Disconnect Switch
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Battery Disconnect Switch OFF (0) position for 2 minutes before discon- necting the batteries to the crane. The Battery Disconnect Switch (1, Figure 3-27) is located on the left side of the carrier. The switch is a two-position ON/OFF rotary switch used to disconnect power from the batteries to the crane.
Page 120: Fuse Box - Carrier
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Fuse Box – Carrier The Fuse Box is located on the left side of the carrier in the battery box and includes fuses listed in Figure 3-28. 10251 FIGURE 3-28 3-46 Published 3-22-2021, Control # 702-02...
Page 121: Fuse And Relay Box - Carrier
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Fuse and Relay Box – Carrier The Fuse and Relay Box is located on the left side of the carrier in the battery box and includes fuses and relays listed in Figure 3-29. 10250 FIGURE 3-29 Grove...
Page 122: Cab Mounted Work Lights
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Cab Mounted Work Lights Adjustable Cab Mounted Work Lights (1, Figure 3-30) are located on the front of the cab. The lights are controlled by the Cab-Mounted Lights Switch, page 3-8. 9838-23 FIGURE 3-31 Side Mounted Carrier Work Lights Two carrier work lights (1, Figure 3-32) are located on each side of the carrier.
Page 123: Ladders And Grab Handles
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Ladders and Grab Handles Ladders (1, Figure 3-33 to Figure 3-36) and grab handles (2) are located at the left and right sides of the crane as well as at the front and rear of the crane. Use these ladders and grab handles to climb and access the carrier deck or the cab.
Page 124: Remote Control Unit
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL REMOTE CONTROL UNIT The Remote Control Unit operates the following crane functions: For operating information regarding the Remote Control • Outrigger Beams Unit, refer to Using the Remote Control Unit, page 4-50. • Outrigger Jacks Overview •...
Page 125: Storage And Charging
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Storage and Charging Keep the spare battery pack in the charger, which is located behind the seat (1, Figure 3-39). The Remote Control Unit is powered by a 3.2 Ah lithium rechargeable battery pack, which provides approximately 10 hours of operation.
Page 126: Controls And Features
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Controls and Features 9864-1 19 Not Shown FIGURE 3-40 3-52 Published 3-22-2021, Control # 702-02...
Page 127: Programming Port
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES Item Description Page Item Description Page Programming Port 3-53 Boom Lift Button 3-54 Power Button 3-53 Swing Button 3-54 Color Display 3-53 Option Button 3-54 Left Side Motion Button 3-53 Engine Button 3-54 Right Side Motion Button 3-53 Horn Button...
Page 128: Outrigger Beam Button
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL From this function screen the boom can be raised and lowered. Swing Button The Swing Button (12, Figure 3-40) is a momentary pushbutton switch. Push the button to cause the swing function screen to appear in the Remote Control Unit display. From this function screen the boom and superstructure can be swung left and right.
Page 129: Escape Button
GRT8120 OPERATOR MANUAL OPERATING CONTROLS AND FEATURES The information screen shows the Remote Control Unit Status Indicator software version and the crane serial number. The Status Indicator (18, Figure 3-40) is a bi-colored LED The serial number shown on the Remote Control Unit must that indicates the status of the Remote Control Unit.
Page 130: Display Components
OPERATING CONTROLS AND FEATURES GRT8120 OPERATOR MANUAL Display Components Example – Swing Functional Screen FIGURE 3-42 Item Component Description Left Motion Command Indicator Depicts the operation that is controlled by the left side motion button Transmission Strength Indicator More bars = greater strength, and vice versa Function Screen Indicator Depicts the function that is being operated (swing in this example) Green = fully charged...
Page 131 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES SECTION 4 OPERATING PROCEDURES SECTION CONTENTS Pre-Starting Checks ......4-4 Swing Drive and Turntable Bearing .
Page 132 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Semi-automatic Telescoping....4-26 Capacity Limiter Display Module ....4-67 Extending with the Main Boom Configuration .
Page 133 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Entering the RCL Code ....4-163 Hoist Camera ......4-174 Checks Before Operating the Crane .
Page 134: Pre-Starting Checks
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL PRE-STARTING CHECKS of excessive deformation of the hook opening (including twist). Be sure safety latch is free and aligned. A complete walk-around visual inspection of the crane should always be made with special attention to structural Seats and Mirrors damage, loose equipment, leaks, or other conditions that Adjust seat and mirrors for clear vision and safe driving.
Page 135: Axle Oscillation Lock Outs Operation
The generated fault codes can be viewed on the Operator Slowly drive off of blocks and stop. Rear tire should be Display Module (ODM) (refer to About the Manitowoc touching the road surface and the opposite front tire Diagnostic Code Mobile Application, page 4-141).
Page 136: Coolant Heater
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL • Battery heater during arctic temperatures. The coolant heater should be activated 2 hours before starting the crane to allow sufficient • Transmission heater time to preheat fluids and assist with easy start-up conditions. • In-line fuel heater •...
Page 137: Battery Heater
Diesel fuel with low temperature characteristics is required to sensor kit (Grove part number 90037674). Contact an operate the engine when ambient temperatures get near or authorized Grove distributor or Manitowoc Crane Care for below 0°C (32°F). Refer to the applicable engine manual for additional assistance.
Page 138: Engine Operation
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL ENGINE OPERATION Start-up and shutdown procedures for most diesel engines CAUTION are generally the same. Therefore, the following procedures Never crank engine for more than 30 seconds during an can be applied, except where specific differences are noted. attempted start.
Page 139: Idling The Engine
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Turn the ignition switch clockwise to position II (START) The crane control system will automatically return the engine and release immediately when the engine starts. idle speed to its usual setting when one of the following conditions occur: Do not push or hold the throttle pedal down.
Page 140: Shutdown Procedure
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Shutdown Procedure The indicator comes on (constant) during the early stages of required cleaning. If this condition continues, the indicator Allow engine to run at fast idle speed for about five will begin to flash and a slight engine derate will occur. minutes to avoid high internal heat rise and allow for If the exhaust system continues to clog, the Engine Warning heat dissipation.
Page 141: Crane Warm-Up Procedures
Maintenance and Lubrication, page Repeat Step 2 until the temperature of the transmission 6-1, by contacting your local Grove distributor, or by sump reaches 20°C (68°F). contacting Manitowoc Crane Care directly). Hoist CAUTION Warm-up procedures are recommended at every startup and Crane Damage Hazard! required at ambient temperatures below 4°C (40°F).
Page 142: Axles
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Axles DRIVING THE CRANE Warm-up Procedures for Temperatures Below -35°C Seat Belts (-30°F): Setup crane on outriggers. Engage transmission with four-wheel drive selected and allow crane to run at idle until transmission sump temperature reaches normal operating temperature. NOTE: Warm-up operation...
Page 143: Traveling - Towing/Pulling
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Traveling — Towing/Pulling CAUTION WARNING Machine Damage Hazard! Tipping Hazard! Grove recommends towing or pulling another vehicle with Avoid holes, rocks, extremely soft surfaces, and any other the optional pintle hook (if equipped) or by attaching at a obstacles which might subject crane to undue stresses or point no higher than the pintle hook height, or severe possible overturn.
Page 144: Traveling On Slopes
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL • Limit travel to a forward direction only. CAUTION • All boom sections must be fully retracted. Machine Damage Hazard! • Boom extension must be in stowed position or removed from the crane (if traveling with an erected boom It is recommended to attach cables/straps to the optional extension, follow the requirements under the section pintle hook (if equipped) or by attaching at a point no...
Page 145: Slope Limitations - Side Slope Travel
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Consideration must be given for the terrain at the end of • Do not exceed a speed of 16 kph (15 mph) with boom the slope (for example, does the terrain level out so that over front with counterweight installed the crane can stop).
Page 146: Extended Traveling
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL • Boom shall be directly over front. Swing lock shall be With Transmission Shift Lever in neutral (N) position and engaged. the parking brake set, start engine and allow it to adequately warm up. • Tires shall be properly inflated (refer to Load Chart Manual).
Page 147: Traveling - Reverse
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Traveling — Reverse The Rear Steer Switch can only be operated when the speed of the crane is less than 8 km/h (5 mph). If operator attempts to use the rear steer switch while driving CAUTION the crane at a speed greater that 8 km/h (5 mph), the rear Machine Damage Hazard!
Page 148: Four-Wheel Drive Operation
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Four-Wheel Drive Operation General The purpose of the differential lock is to provide maximum CAUTION traction and control on poor road or highway surfaces. When Machine Damage Hazard! differential locks are actuated, the clutch collar completely locks the differential case, gearing, and axle shafts together, Do not tow or pull in 1st gear with Drive Axle Selector maximizing traction to both wheels of each axle.
Page 149: Craning Functions
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Engage differential locks by doing the following: A working crane may settle during lifting operations. Frequently check the crane for level. When rechecking the NOTE: The crane control system only allows the crane for level, the boom must be positioned over the front of differential lock to be engaged for a maximum of 60 the crane, fully lowered to horizontal and fully retracted, and seconds at a time, regardless of whether the...
Page 150: Setting The Outriggers Using The Auto-Level Feature
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Disable all crane functions Fully lower cab DANGER Position the outrigger pads directly out from each Tipping Hazard! outrigger to where the outriggers will be properly extended. Operator must select the proper rigging code from the load chart and RCL program for the outrigger position If required, extend the outrigger beams to the selected.
Page 151: Outrigger Monitoring System (Oms) (Optional-Standard In North America And European Union Countries)
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Fully extend the four outrigger jacks. Retract the four outrigger jacks using the Outrigger Extend/Retract Switch and the Operator Display Begin the automatic level process using the Outrigger Module. Extend/Retract Switch and the Operator Display Module (refer to Leveling the Crane Using Auto-level, page Refer to Extending/Retracting Individual Outrigger 4-104).
Page 152: Swinging The Boom And Superstructure
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Swinging the Boom and Superstructure Single Axis Controller (Optional) Push the Swing Enable/Disable Switch on left armrest to enable the swing function. The Swing Enable Indicator will come on (green). DANGER Push outer controller on left armrest forward and hold to Crushing Hazard! swing right (rotates turntable clockwise) or pull controller Death or serious injury could result from being crushed by...
Page 153: Lowering The Boom
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Pull inner controller on right armrest rearward and hold When boom angle gets to the desired elevation, let to raise the boom. controller return to the center (neutral) position to stop boom lower function. When boom angle gets to the desired elevation, let controller return to the center (neutral) position to stop Telescoping the Boom boom lift function.
Page 154: Extending The Boom
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL unlocks the boom section from the supporting boom Extending the Boom section so it can be moved. The operator can then extend the boom section by moving the controller in the extend direction or retract it by moving the controller in DANGER the retract direction.
Page 155: Retracting The Boom
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Single Axis Controller (Optional) (Crane not Equipped with Push controller on left armrest rearward and hold to Auxiliary Hoist) retract the boom. Push the Telescope Enable/Disable Switch on right When boom gets to the desired length, let controller armrest to enable the boom telescope function.
Page 156: Telescoping - Theory Of Operation
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Telescoping - Theory of Operation Semi-automatic Telescoping When telescoping with semi-automation, the operator enters The following section describes the internal operation of a a telescoping sequence or “tele picture” and the Crane pinning boom. Control System (CCS) controls all of the locking and The telescoping process requires locking and unlocking unlocking processes automatically.
Page 157: Extending With The Main Boom Configuration
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Extending with the Main Boom Configuration The section locking pins (7) are pushed into the cutouts (4) of the telescopic section at the locking points – the telescopic The CCS display shows various sectional views of the main section is locked.
Page 158: Telescoping Process
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Telescoping Process The state shown in Figure 4-6 should be the starting point for a telescoping process. The telescoping processes consist of 4 steps: Unlocking the telescoping cylinder The locking pins (5, Figure 4-6) retract – the telescoping cylinder is unlocked.
Page 159 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Telescoping, locking and setting down a telescopic The telescopic section is automatically set down. section The telescoping cylinder retracts until the locking pins The telescoping cylinder pushes the telescopic section (7, Figure 4-10) are positioned on the above telescopic to a locking point.
Page 160: Assignment For Display
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Assignment for Display The CCS display shows a sectional view of the main boom in the menus. The following elements are displayed Figure 4-11: 9093 FIGURE 4-11 Base section Telescopic section 1 Telescopic section 2 Telescopic section 3 Section locking pin on the telescopic section Cylinder locking pins on the telescoping cylinder...
Page 161: Fixed Length And Intermediate Length
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Fixed Length and Intermediate Length If a malfunction results in saved values being deleted, CCS can no longer calculate the current telescoping and may not There are lifting capacity tables for main boom fixed lengths issue an error message.
Page 162: Disabling The Telescoping Mechanism
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Telescoping will only start if left arrow for retracting • Unlocking the tele section (page 4-36) (1, Figure 4-12) or right arrow for extending (2) is shown in • Telescoping the tele section (page 4-36) the indicated location of the operating display screen (either the semi-automation or manual telescoping screen).
Page 163 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Current Telescoping The display (1, Figure 4-15) shows how far the telescoping cylinder is extended, e.g. 1293 mm. The display (2) shows the current main boom length, e.g. 37.0 ft. The display (3) shows the corresponding telescopic section, e.g.
Page 164 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Unlock • Telescopic section locked – symbol (1) green Select the symbol (1, Figure 4-18). • Telescoping cylinder unlocked – symbol (2) red Confirm the selection – the locking pins (2, Figure 4-19) will retract. Yellow: Intermediate position Red:...
Page 165 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES The direction of travel to the locking point (Figure 4-22): Lock Move the telescoping cylinder to the desired locking Extending point, e.g. to telescopic section 1 (Figure 4-24). Retracting Wait until the display: At the locking point shows the desired telescopic section (1) the symbols (2) are shown.
Page 166 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Unlocking the Telescopic Section Unlocking a telescopic section is required for the telescopic section to be telescoped. The telescoping cylinder and the telescopic section cannot be unlocked simultaneously. Prerequisites Telescoping function enabled – symbol (3, Figure 4-25) green Telescopic section locked –...
Page 167 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Telescoping Lock If the requirements for telescoping are met, the symbol Telescope to the desired fixed length, e. g. telescopic (2, Figure 4-28) is shown. section 6 to 100% (1, Figure 4-30). Move the control lever in the desired telescoping direction. If the symbol (3) is displayed, the telescopic section can be locked.
Page 168: Telescoping With Semi-Automation
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Telescoping with Semi-automation When telescoping with semi-automation (or the semi-auto mode), the operator enters, on the Operator Display Module (ODM), the pinning location for each of the boom sections (a t a r g e t o r r e q u e s t e d “ t e l e p i c t u r e ” ) . I f t h i s p i n n i n g configuration is accepted by CCS, then the controller is used t o m o v e t h e b o o m s e c t i o n s t o t h e p r e - d e t e r m i n e d configuration.
Page 169 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES The end of the graphical representation of the rod at the T5 boom section which is at the 100% pinning location. The slightly larger rectangular entity at the right end of the telescoping cylinder rod represents the pinning mechanism. 10254-14 FIGURE 4-33 The arrows (1, Figure 4-33), at some point in the telescoping...
Page 170: Semi-Auto Mode Basic Operating Procedures
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Second, there is a set of percentage values shown under the • Verify that the telescoping function is enabled. This is requested final boom configuration values. In Figure 4-33, confirmed by the green background for the icon for the these are shown as 0%-0%-0%-0%-0%-0% (4).
Page 171 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES • The operator uses the controller to extend the boom • When the T5 boom section is unlocked, the left and right section. The boom motion will slow down near the 100% telescoping direction arrows will appear again (as is pinning location (for this example).
Page 172: Semi-Auto Mode For Shifting Cylinder Within Fully Retracted Boom
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL • The operator can command the retract direction for at will be in the position desired (such as locked to T1 least 1 second, and then the boom section will lock at boom section). Semi-auto Mode Requiring Boom to be •...
Page 173: Semi-Auto Mode Warning Indications
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES control system can then “shift” to the new REQUESTED final will be shown in the left Alerts Area (Figure 4-68) of the boom configuration). ODM. Semi-auto Mode Warning Indications The control system manages a fault indication system. This is characterized by a set of error codes or fault codes.
Page 174: Semi-Auto Mode Lost Boom Configuration
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL is possible to command slight telescoping cylinder motions the OK shown on the screen. If this is the correct code, then to assist with locking or unlocking. th e res et t eles co ping sc re en ap pe ars a s sh own in Figure 4-45.
Page 175: Semi-Auto Mode Vs. Manual Mode
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES • When each of the spin boxes is set to the correct value telescoping cylinder unlocking, and again at the proper or indication, then an Enter button can be used on the time the lock icon would be used to again lock the OK in the screen.
Page 176 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL configuration. Note that the boom configurations shown are As an example, the RCL rigging information can be set as dependent on the rigging information already entered on the follows (including using the check-mark to activate this RCL display, so be certain to set this rigging information selection): correctly.
Page 177: Lowering And Raising The Main Hoist Rope
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Figure 4-50 shows the expected typical boom configurations Thus, enter the value of 13.5 klbs for the Boom Configurator. for the three criteria that have been entered. Note that the Lowering and Raising the Main Hoist Rope first row has the radius and load highlighted in green.
Page 178: Raising The Main Hoist Rope
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Lowering and Raising the Auxiliary Hoist (5, Figure 3-13) pulses and the Main Hoist Lower Indicator (Figure 4-73) comes on to indicate to the Rope operator that the main hoist is operating. Raising the Main Hoist Rope DANGER Crushing Hazard! Keep area beneath load clear of all obstructions and...
Page 179: Raising The Auxiliary Hoist Rope
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES NOTE: When the auxiliary hoist controller is pushed When hook block/overhaul ball gets to the desired forward to lower the rope, the Hoist Rotation height, let controller return to the center (neutral) Indicator (5, Figure 3-13) pulses and the Auxiliary position to stop raising the auxiliary hoist rope.
Page 180: Using The Remote Control Unit
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL USING THE REMOTE CONTROL UNIT Enable the Remote Control Unit by pressing the top of Remote Control Enable/Disable Switch For an overview of the remote control unit’s controls and (12, Figure 3-3) on the Right Overhead Control Panel in features, and storage and charging information, refer to the cab.
Page 181: Operating Remote Control
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES 10. Press the ESC Button on the Remote Control Unit to Disable the Remote Control Unit by pressing the confirm that you have read the warning and to bring up bottom of the Remote Control Enable/Disable the MAIN Screen (Figure 4-52).
Page 182 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL FIGURE 4-54 4-52 Published 3-22-2021, Control # 702-02...
Page 183: Engine Start/Stop/Throttle
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-1 – Engine Start/Stop/Throttle Function Screen Item Indicator Name Description Engine (start/stop) 1 - Green = engine can be started or stopped Function 2a - Blue = engine cannot be stopped until either enable button is held down Stop Engine 2b - Green = engine can be stopped with left motion button 3a - Blue = engine cannot be started until either enable button is held down...
Page 184 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL FIGURE 4-55 4-54 Published 3-22-2021, Control # 702-02...
Page 185: Outrigger Beams
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-2 – Outrigger Beams Function Screen Item Indicator Name Description 1a - Both left side beams will be operated 1b - Both right side beams will be operated 1c - Left front beam will be operated Outrigger Beams Function 1d - Left rear beam will be operated...
Page 186 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL FIGURE 4-56 4-56 Published 3-22-2021, Control # 702-02...
Page 187: Outrigger Jacks
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-3 – Outrigger Jacks Function Screen Item Indicator Name Description 1a - All four jacks will be operated at same time 1b - Both left side jacks will be operated 1c - Both right side jacks will be operated Outrigger Jacks 1d - Left front jack will be operated Function...
Page 188 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL FIGURE 4-57 4-58 Published 3-22-2021, Control # 702-02...
Page 189: Hoist Control (Main And Aux)
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-4 – Main/Auxiliary Hoist Function Screen Item Indicator Name Description Main Hoist Function 1 - Green = main hoist can be operated 2a - Blue = main hoist cannot be operated until either enable button is held down Reel Out (lower) 2b - Green = hoist rope can be reeled out from main hoist with left motion button 3a - Blue = main hoist cannot be operated until either enable button is held down...
Page 190 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL FIGURE 4-58 4-60 Published 3-22-2021, Control # 702-02...
Page 191: Boom Lift
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-5 – Boom Lift Function Screen Item Indicator Name Description Boom Lift Function 1 - Green = boom can be operated 2a - White = boom cannot be operated until either enable button is held down Boom Down 2b - Green = boom can be lowered with left motion button 3a - White = boom cannot be operated until either enable button is held down...
Page 192 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL FRONT 0° -90° 90° -179.9° |180° FIGURE 4-59 4-62 Published 3-22-2021, Control # 702-02...
Page 193: Swing And 360° Swing Lock
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-6 – Swing Function Screen Item Indicator Name Description Swing Function 1 - Green = swing can be operated 2a - Blue = cannot swing left until either enable button is held down Swing Left 2b - Green = can swing left with left motion button 3a - Blue = cannot swing right until either enable button is held down Swing Right...
Page 194 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL 50.0 FIGURE 4-60 4-64 Published 3-22-2021, Control # 702-02...
Page 195: Opt (Options)
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-7 – Option Function Screen Item Indicator Name Description Luffing Boom Extension Offset Function Rear Boom Extension Stowage Actuator Green = function can be operated Function Front Boom Extension Stowage Actuator Function 4a - White = operation cannot be performed until either enable button is held down Retract Actuator Lower Boom Extension 4b - Green = operation can be performed with left motion button...
Page 196: Information
GRT8120 OPERATOR MANUAL • Remote control unit’s software version (1) You will need to know the software version when communicating with your Grove dealer or Manitowoc Crane Care. • Crane Serial Number (2) The remote control must remain with the crane it was supplied with.
Page 197: Navigating The Operator Display Module And Rated Capacity Limiter Display Module
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES NAVIGATING THE OPERATOR DISPLAY MODULE AND RATED CAPACITY LIMITER DISPLAY MODULE For a description the Operator Display Module and Rated Capacity Limiter Display Module (ODM and RDM), refer to Rated Capacity Limiter Display Module and Operator Display Module, page 3-17 The ODM and RDM each have an integral Navigation Control Pad (Figure 4-62) which allows the operator to...
Page 198: Using The Operator Display Module (Odm)
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL increase the speed at which the numbers change. Once the For detailed information on the Main Screen of the ODM, desired number or letter is shown, press the jog dial again to refer to the section titled Main Screen, page 4-69. confirm the selection.
Page 199: Main Screen
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Main Screen • Press the Escape Button (3, Figure 4-66) on the Navigation Control Pad at the ODM. The Main Screen (Figure 4-67) appears on the ODM (lower screen) when the key switch is initially set to the ON position. Navigating back to the Main Screen can be accomplished by doing one of the following procedures: •...
Page 200: Alerts Area
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Alerts Area • Blue - Limit/Status • Yellow - Non Critical The Alerts Area of the ODM Main Screen shows caution and warning alerts when a crane system is not operating • Red - Critical normally.
Page 201 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Name Symbol Description Hydraulic Oil Indicates the hydraulic oil temperature input to the crane control system is Temperature Invalid invalid. Alert Indicates the transmission oil temperature is too high. Transmission Oil Temperature Warning When safe to do so, move the crane to a location where it can be parked and Alert secured, then let the transmission cool by running the engine at idle.
Page 202 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Name Symbol Description Constant On – Indicates the cab is not in the fully lowered position. Flashing – Indicates one of the following has occurred: Operator is trying to tilt the cab while the parking brake is not applied, the transmission is not in neutral, or the seat switch is not active (operator is not sitting in the seat).
Page 203 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Name Symbol Description Constant On – Indicates the boom has reached the carrier avoidance area. When the indicator comes on, the warning buzzer will sound. The crane system will lock out the boom down and swing left or right crane functions. Low Boom Angle Alert Flashing –...
Page 204 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Name Symbol Description Rear Wheels Not Indicates the rear wheels are not centered. Centered Alert Indicates the service brake pedal is not pushed while doing one of the following operations: Shifting the transmission between two-wheel drive (high range) and Service Brake Pedal four-wheel drive (low range).
Page 205 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Name Symbol Description Indicates the hydraulic pressure in the service brake system is below normal operating requirements. When the indicator comes on (red), the warning Low Service Brake buzzer will sound. Pressure Alert Do not drive crane until brake pressure malfunction is corrected. Indicates the hydraulic pressure in the steering system is below normal operating requirements.
Page 206: Active Screen Indicator Area
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Active Screen Indicator Area The following indicator can appear in the Active Screen Indicator Area (1, Figure 4-69) of the ODM Main Screen: 10254-39a FIGURE 4-69 Name Symbol Description Indicates the ODM screen is being controlled by the Jog Dial. Active Screen Indicator Refer to Navigating the Operator Display Module and Rated Capacity Limiter Display Module, page 4-67.
Page 207: Crane Information Area
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Crane Information Area The following indicators make up the Crane Information Area (Figure 4-70) of the ODM Main Screen. 10254-39a Item Description Item Description Direction/Gear Indicator Transmission Oil Temperature Indicator Engine Speed Indicator Speedometer Engine Coolant Temperature Indicator Battery/Charging Voltage Indicator Diesel Exhaust Fluid (DEF) Level Indicator Hydraulic Oil Temperature Indicator...
Page 208 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Item Name Symbol Description Indicates if the transmission is in neutral (N), forward (F), or reverse Direction/Gear (R) and what gear is selected [first gear (1), second gear (2), or third Indicator gear (3)]. Engine Speed Indicator Shows engine speed in revolutions per minute (RPM).
Page 209 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Item Name Symbol Description Shows the cranes travel speed in the selected unit of measure (km/h Speedometer - mph). Shows the battery voltage when the engine is off and the charging voltage when the engine is running. Battery/Charging Voltage Indicator Red Indicator - Indicates the battery voltage is less than 20V or...
Page 210: Crane Status Area
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Crane Status Area The following indicators make up the Crane Status Area (Figure 4-71) of the ODM Main Screen. 10254-39a Item Description Parking Brake Indicator Marker Light/Headlight Indicator Suspension Control Indicator Economy (ECO) Mode Indicator Two-Wheel Drive/Four-Wheel Drive Indicator Working Range Limiter (WRL) Indicator FIGURE 4-71...
Page 211 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Item Name Symbol Description Parking Brake Indicator Indicates the parking brake is not applied. Parking Brake Applied Indicates the parking brake is applied (refer to Parking Brake Switch, Indicator (Red) page 3-5). Marker Light/Headlight Indicates the marker lights and headlights are off. Off Indicator Marker Light/Headlight Indicates that either the marker lights or headlights are on (refer to...
Page 212 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Item Name Symbol Description WRL Indicator Indicates all working range limiters are off. Indicates one or more working range limiters are defined and WRL Indicator (Green) enabled. WRL Bypassed Indicates a WRL lock out function is bypassed by a Limit Bypass Indicator (Amber - Switch.
Page 213 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Item Name Symbol Description Indicates that the minimum boom angle limit, the maximum boom WRL Radius Enabled angle limit, or both the minimum and maximum boom angle limits Indicator (Green) are defined. Indicates the boom radius is within 3 m (10 ft) of a radius limit setpoint.
Page 214 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Item Name Symbol Description WRL Virtual Walls Indicates that one or more virtual walls are defined. Enable Indicator Indicates the boom tip is within 6 m (20 ft) of a virtual wall that has been set. WRL Virtual Walls The warning buzzer slowly beeps when the boom tip is within 6 m Warning Indicator...
Page 215: Frequently Used Quick Select Menu Area
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Frequently Used Quick Select Menu Area During the operation of the crane, the function icons that appear in this area will change as their usage changes. T h e F r e q u e n t l y U s e d Q u i c k S e l e c t M e n u A r e a Use the Navigation Control Pad or Jog Dial to select one of (1, Figure 4-72) of the ODM Main Screen shows the six most the function icons in this area.
Page 216: Status Bar
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Status Bar Each crane function indicator can have the following status: • Blue Indicator – Indicates the crane function is disabled. The indicators in the Status Bar (Figure 4-73) represent the crane functions that are operated by the controllers on the •...
Page 217 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Additionally, the main and auxiliary hoist indicators can have the following status: Name Symbol Description Main Hoist Raise Indicates the main hoist rope is being reeled in. Indicator (Green) Main Hoist Lower Indicates the main hoist rope is being let out. Indicator (Green) Main Hoist High Speed Indicates the main hoist function and the high speed function are enabled.
Page 218: Permanent Quick Select Menu Area
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Permanent Quick Select Menu Area The Permanent Quick Select Menu Area (Figure 4-74) of the ODM Main Screen shows six function icons that are frequently used in the operation of the crane. These six function icons are constantly shown and cannot be changed. Use the Navigation Control Pad or Jog Dial to select one of the function icons.
Page 219: Menu Screen
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Item Name Symbol Description Menu Screen Icon Opens the Menu Screen (page 4-90) Outrigger Function Opens the Outrigger Extend/Retract function screen (page 4-99) Icon Camera 1 Function Icon Opens the Right Side Camera View function screen (page 4-94) Semi-automatic Opens the Semi-automatic Telescope Mode function screen Telescope Mode...
Page 220: Menu Screen
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Menu Screen • Working Range Limiter Menu Group (12) Swing Angle Limitation (13) The Menu Screen (Figure 4-76) of the ODM is accessed by doing one of the following: Boom Angle Limitation (14) • Press the Screen Toggle Button (1, Figure 4-75) at the Boom Height Limitation (15) Jog Dial to select the ODM screen control, then press Radius Limitation (16)
Page 221 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES THIS PAGE BLANK Grove 4-91 Published 3-22-2021, Control # 702-02...
Page 222 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL 10254-1 10254-2 FIGURE 4-76 4-92 Published 3-22-2021, Control # 702-02...
Page 223 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Item Description Page Item Description Page Camera Menu Group Icon 4-94 Emergency Telescope Mode Icon 4-130 Telescope Recovery Mode Icon - Camera View 1 Icon 4-94 4-44 Resetting Telescope Configuration Camera View 2 Icon 4-94 Faults Menu Group Icon 4-141 Camera View 1/2 Icon...
Page 224: Camera Menu Group
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Camera Menu Group The Camera Menu Group (1, Figure 4-77) includes the following camera view function icons: • Camera View 1 – Rear View (2) • Camera View 2 – Right Side View (3) • Camera Views 1/2 –...
Page 225: Tele-Automation Menu Group
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Tele-automation Menu Group The image shown in Figure 4-82 shows the status of the section and cylinder pins. Green (1) indicates that the pin is The Tele-automation Menu Group (1, Figure 4-80) includes locked, Yellow (2) shows that it is in an intermediate position the following boom telescoping function icons: and Red is unlocked.
Page 226 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Main Boom Length Display Current telescope Status Display Extended length of the telescopic sections in percentage Current extended length of the main Display: boom (1, Figure 4-84) Display of telescopic sections 1 to 6 1 - 6 Unit of Displayed depending on setting, m (Figure 4-86)
Page 227: Boom Configurator Mode
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Pre-selection for Individual Telescopic Sections Confirm Pre-selection Display of telescopic sections 1 to 6 Confirm request to use entered telescoping values 1 - 6 (Figure 4-85) (Figure 4-90) Once a new set of values are entered for telescoping, the question-mark appears until the OK is confirmed.
Page 228 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL 10254-22a FIGURE 4-92 Item Description Lift plan radius entry box Lift plan hook load entry box Lift plan boom length entry box Symbol indicating radius for first column of the table. Symbol indicating hook load for second column of the table. Symbol indicating boom length for third column of the table.
Page 229: Crane Function Menu Group
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Crane Function Menu Group The Outrigger Extend/Retract function screen (Figure 4-94) allows the operator to set the outriggers and level the crane The Crane Function Menu Group includes the following using either a manual or semi-automatic mode. The function icons: Outrigger Extend/Retract function screen is also used to retract and stow the outriggers as well as operate the side...
Page 230 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL 10269-1 FIGURE 4-94 Item Description Item Description Left Front Beam/Jack Menu Screen Icon Right Front Beam/Jack O/R Beams Icon Right Rear Beam/Jack O/R Jacks Icon Left Rear Beam/Jack O/R Jacks x4 Icon Percentage Outrigger Beam is Extended Auto-level Icon Steering Wheel (to indicate front of crane) Side Mounted Carrier Work Lights On/Off Icon...
Page 231 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Extending/Retracting the Outriggers Beams To extend or retract the O/R beams, perform the following procedure: Using the Jog Dial, or the Arrow Buttons at the Navigation Control Pad, select the O/R Beam icon (6, Figure 4-96) (icon will turn orange when selected). Press the Jog Dial, or the OK Button at the ODM, to make the O/R Beam icon active (icon will turn green when active).
Page 232 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Extending/Retracting Individual Outrigger Jacks appear to indicate whether the jack is extending or retracting. In the following example (Figure 4-98), the top image shows To extend or retract an individual O/R jack, perform the the Left-Front O/R jack is extending and the bottom image following procedure: shows the Left-Front O/R jack is retracting.
Page 233 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Extending/Retracting the Outrigger Jacks - x4 When extending or retracting all four outrigger jacks at the same time, the four O/R jack images turn orange to indicate To extend or retract all four O/R jacks at the same time, that they are active.
Page 234 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Leveling the Crane Using Auto-level To begin the auto-level function, position the Outrigger Extend/Retract Switch (17, Figure 3-9) on the left To level the crane using the auto-level function, perform the armrest to the extend or retract position, then press and following procedure: hold the button (1, Figure 4-102) at the Jog Dial or Navigation Control Pad that corresponds to the...
Page 235: 360° Swing Lock (Optional)
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Operating the Side Mounted Carrier Work Lights The carrier has four side lights which can be used to illuminate the area around the crane (refer to Side Mounted Carrier Work Lights, page 3-48 for more information). Switch the carrier side lights on and off by doing the following: Using the Jog Dial or Arrow Buttons on the Navigation...
Page 236: Boom Extension Deployment/Stowage
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Press the Jog Dial or the OK Button to start the locking process. When the lock is disengaged, the Unlock Status Indicator (4, Figure 4-105) will appear. Boom Extension Deployment/Stowage Select the Boom Extension Deployment/Stowage icon (1, Figure 4-107) under the Crane Function Group to show the Boom Extension Deployment/Stowage function screen.
Page 237: Working Range Limiter Menu Group
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Working Range Limiter Menu Group Introduction The Working Range Limiter (WRL) is a feature of the Crane Control System, located on the ODM, that allows the FIGURE 4-108 operator to define boundaries or limits for crane operation. 9478 With obstacles and limits accurately defined, the WRL will WRL Menu Group...
Page 238 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL also done with the screen and buttons on the ODM, as well the controller may be reduced or suspended depending as possibly operating the boom to define particular locations. upon the weight of the load and the swing speed. With the limitation enabled and defined, the control system can then provide the needed feedback and warnings based upon the defined limitations.
Page 239: Accessing A Wrl Limitation Screen
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Table 4-8 – WRL Alarm Characteristics LIMITATION POSITION ALARM INDICATOR Swing Angle Limitation 10 deg before limit Slow beeping Amber 5 deg before limit Fast beeping At limit Solid sound Boom Angle Limitation 10 deg before limit Slow beeping Amber 5 deg before limit...
Page 240 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Table 4-9 – WRL Limitation Screen Symbols Symbol Description Symbol represents the Working Range Limitation (WRL) Menu Group. Symbol represents the Swing Angle Limitation. Symbol represents the Boom Angle Limitation. Symbol represents the Boom Height Limitation. Symbol represents the Working Radius Limitation.
Page 241 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Symbol Description Enable/Disable Switch (ON/OFF) Symbol - The Enable/Disable (ON/OFF) Switch Symbol with the orange box indicates the Icon is active and can change. The box in orange next to the “I” would indicate enabled. The orange box next to the “O” indicates disabled. This symbol is used for all of the WRL Limitation Screens.
Page 242 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Symbol Description Working Range Limiter (WRL) Boom Angle Indicator - Stop. Working Range Limiter (WRL) Boom Height Indicator - Active. Working Range Limiter (WRL) Boom Height Indicator - Enabled. Working Range Limiter (WRL) Boom Height Indicator - Stop. Working Range Limiter (WRL) Radius Icon - Active.
Page 243 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Symbol Description Working Range Limiter (WRL) Wall Icon - Stop. This is the inner or Minimum Radius Limitation Indicator. This is the outer or Maximum Radius Limitation Indicator. Virtual Wall Number - this is used to indicate the virtual wall that is being defined or altered (there can be up to 5 virtual walls).
Page 244: Boom Height Limitation
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Boom Height Limitation (5, Figure 4-63) changes the Icon highlighted on the screen. As the arrow keys are pressed, the highlight will move If the Boom Height Limitation is selected from the menu of between the Icons, with the color orange typically meaning WRL Limitations, then the Boom Height Limitation Screen t ha t th e ob j e c t i s s el e c t ed a nd c a n b e a ff ec t e d b y will be shown (Figure 4-109).
Page 245 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Move the Boom tip to the desired position. This position move to the Enable/Disable Switch (1, Figure 4-109). will indicate the boom height current value (2 and 4) NOTE: Switch (1, Figure 4-109) positions. Enable/Disable Switch and is a toggle switch. Click OK (5, Figure 4-62), or the Jog Dial (5, Figure 4-63) to Enable Limitation...
Page 246: Boom Angle Limitation
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Boom Angle Limitation If the Boom Angle Limitation Menu is selected from the Main Menu of WRL Limitations (3, Figure 4-108), then the Boom Angle Limitation Screen will be shown (Figure 4-110). Boom Angle Limitation Screen 9841-10 FIGURE 4-110 Example Only - Display Values May Vary...
Page 247 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Setting the Boom Up Angle Limitation by Crane Icon (8, Figure 4-110) is shown on the top left side of the ODM screen. Position Move the Boom to the desired position. This position will To set parameters and enable the Boom Up Angle Limitation, indicate the boom angle current value B (5) position.
Page 248 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL tenths) desired boom angle value (5, Figure 4-62), or the Jog Dial (5, Figure 4-63) to set (3, Figure 4-110). the switch. NOTE: The Limitation is dependent on the accuracy of the Use the Jog Dial (5, Figure 4-63), or the Right Arrow Key Boom Angle Sensor, which can be ±1 degrees.
Page 249: Radius Limitation
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Radius Limitation If the Radius Limitation is selected from the Menu of WRL Limitations, then the Radius Limitation Screen will be shown (Figure 4-111). Working Radius Limitation Screen 8882-9c Example Only - Display Values May Vary FIGURE 4-111 WRL - Working Radius Limit Menu Using the Left Arrow and Right Arrow function on the display...
Page 250 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Setting the Inner/Outer Working Radius Limitation by Set the RDM screen parameters first. Refer to Using the Rated Capacity Limiter Display Module (RDM), page Crane Position 4-158. To define and enable the Inner Radius Limitation using the Using the Jog Dial (5, Figure 4-63), go to the ODM Main crane current hook radius as the limitation, the following Menu Screen.
Page 251: Swing Angle Limitation
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Swing Angle Limitation highlighting. Table 4-9 lists all of the symbols for the Limitation Menus that are available on the WRL Limitation If the Swing Angle Limitation is selected from the menu of Screens. WRL Limitations, then the Swing Angle Limitation Screen will Setting the Swing Angle Limitation be shown (Figure 4-112).
Page 252 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL The Swing Angle Limitation Menu Repeat Steps 4 thru 6 to set the Limitation B (4, Figure 4-112) Swing (Right) Direction value. The Swing Angle Limitation Menu allows the operator to set NOTE: The boom is now at the limitation so an alarm will the limits for the boom to operate within.
Page 253 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Swing Angle Limitation Disable Procedure Swing Angle Limitation with Lock-Out Function Enabled To disable an active Swing Angle Limitation, the following steps are to be used: For cranes that are equipped with the WRL Lock-Out Function, when the swing angle is within 10°...
Page 254: Virtual Walls Limitation
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Virtual Walls Limitation If the Virtual Wall Limitation is selected from the menu of WRL Limitations, then the Virtual Wall Limitation Screen will be shown (Figure 4-113). Using the Left Arrow and Right Arrow (4, Figure 4-62) Function Keys on the Display or the Jog Dial (5, Figure 4-63) changes the object highlighted on the screen.
Page 255 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES The Virtual Walls Limitation Menu allows the operator to should now be shown on the screen with a label of '1a' define up to five walls or barriers in which the boom is not as indicated in the yellow box in the sample in expected to operate.
Page 256 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Virtual Walls Limitation Screen with 2 Virtual Walls already active 8797-37 FIGURE 4-114 EXAMPLE ONLY- Display Values May Vary Defining Subsequent Virtual Walls The location of the point should now be shown on the screen with a label that shows the wall number and the To define and enable further Virtual Walls (such as Virtual letter 'a' as shown in the yellow highlight in the sample Walls 2 through 5), the following steps can be used:...
Page 257 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES that the boom is now at the wall limitation, so Use the Left Arrow and/or Right Arrow (4, Figure 4-62) alarms will sound. The boom can now be moved keys or the Jog Dial (5, Figure 4-63) to highlight the away from the wall to cease the alarm.
Page 258: Emergency Program Menu Group
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Emergency Program Menu Group Telescoping Cylinder Locked/Released The Emergency Program Menu Group (1, Figure 4-115) Display Locking pins intermediate position Yellow: includes the following boom telescoping function icons: Figure 4-117 Green: Telescoping cylinder locked • Manual Mode (2) Red: Telescoping cylinder unlocked...
Page 259 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Lock/release Telescopic Section Indication Telescoping Cylinder Length Display Display Locking pins intermediate position Current extended length of the Yellow: Display: (Figure 4-119) telescoping cylinder (Figure 4-121) Green: Telescopic section locked Unit of Displayed depending on setting, mm measurement: (millimeters) or ft (feet) and percent (%) Red:...
Page 260: Emergency Telescope Mode
Telescoping • If Manitowoc Crane Care or Local Distributor has emergency program. provided a passcode for the extended emergency program, then the passcode can be entered by using the...
Page 261 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Operator can cancel the entry at any time using the (6 or 7, After the correct entry has been made, the Telescoping Figure 4-126) buttons. emergency program is started. The emergency program has a time limit. The display (1, Figure 4-128) shows the remaining time for operating the emergency program.
Page 262 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Access Telescoping Emergency Program Menu Enter a password to open the telescoping emergency program menu. 8882-21b FIGURE 4-127 Item Description Refer to Enter the password HELP to access the Telescoping emergency program with basic controls. To enter the password, highlight a letter, select Enter to alter the letter, dial the new letter,...
Page 263 FIGURE 4-128 Determining the Error Type an error on the precision length sensor length indicator of the CCS. Contact Manitowoc Crane Care or your Local Distributor to determine if you are permitted to start the CAUTION telescoping process. Item 1 is the time remaining to correct Machine Damage Hazard! the error.
Page 264 The arrow buttons on the display or the jog dial Manitowoc Crane Care or your Local Distributor to can be used to highlight this, and hitting the OK/Enter button determine if you are permitted to start the telescoping will then attempt to execute the command.
Page 265 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES capabilities is intended to be able to get the tele cylinder to the configuration where the tele cylinder CAUTION pinning head can be serviced from the access hole Machine Damage Hazard! in the base section, not to fully retract the boom a f t e r f a i l u r e s o f s e n s o r s o r m e c h a n i c a l When a override switch is used there is no monitoring of components.
Page 266 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Checks Before Telescoping representation of the tele cylinder - refer to Item 1 in Figure 4-129. Before telescoping, the following conditions are expected to The telescoping boom section is unlocked (the unlock be met (but depending on what components may have failed symbol is shown near the graphical representation of the the conditions may not be met): section pins - refer to Item 2 in Figure 4-129.
Page 267 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Retracting and Locking a Telescopic Section CAUTION During telescoping motion you are not to select Lock. Under no circumstances, while the tele cylinder is moving, should Machine Damage Hazard! you select and press the symbol (4, Figure 4-129). If you select Lock during telescoping, the locking pins on the telescopic section are slid out immediately and they can damage or tear the electrical or hydraulic components...
Page 268 Risk of Damage to Main Boom! You can select and confirm the symbol for unlocking the telescopic section. If this does not start the unlocking procedure, contact your local distributor or Manitowoc Crane Care. • Select and confirm the symbol (3, Figure 4-129).
Page 269 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Extending and Locking the Telescoping Cylinder • a telescopic section. Locking Points for the Telescoping Cylinder Under no circumstances should you select and press the lock symbol (1, Figure 4-132) while the tele cylinder is in Table 4-3 shows the extended length for locking the motion.
Page 270 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL When this switch is triggered, the symbol shown in emergency program is being used, then it is still possible to Figure 4-136 should appear on the left side of the ODM still extend the cylinder (such as when the switch is display or in the middle of the Emergency Mode screen malfunctioning or disconnected), but this should only be Figure 4-137.
Page 271: Faults Menu Group
FIGURE 4-140 mobile devices. Crane fault codes with an “X” beside them can be cleared by To look up a fault code with the Manitowoc Diagnostic Code the operator. Crane fault codes with an “X” surrounded by a mobile application:...
Page 272 Find the fault code you want to research in the Fault Click CCS. Code function screen of the Operator Display Module The CCS screen appears. (ODM). Open the Manitowoc Diagnostics Code Application on your mobile device. The Diagnostic Code Application splash screen appears. FIGURE 4-144...
Page 273 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Click Continue. The Fault code information is displayed. 10158 FIGURE 4-145 Click OK to return to the main screen. Grove 4-143 Published 3-22-2021, Control # 702-02...
Page 274: Engine Faults
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Engine Faults If several fault codes are active, use the Jog Dial or Arrow Buttons on the Navigation Control Pad to select the arrow at Select the Engine Faults icon (1, Figure 4-146) under the the top or bottom of the screen to scroll through the codes Faults Menu Group to view active engine fault codes.
Page 275 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES 9902-21 Item Description Item Description Swing Operating Hours Engine Operating Hours Boom Telescope Operating Hours Transmission Operating Hours Boom Lift Operating Hours Boom Pinning Count Main Hoist Operating Hours Reset All Icon Auxiliary Operating Hours FIGURE 4-149 Grove 4-145...
Page 276: Software Versions
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL The top number for each crane function shows the total To reset all crane function operating hours and counts to accumulated hours (1, Figure 4-150). The bottom number is zero (0), select the Reset All icon (9, Figure 4-149) (icon will a trip meter and shows total hours since the last reset (2).
Page 277: User Settings Menu Group
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES User Settings Menu Group Controller Curve Select the Controller Curve icon (1, Figure 4-152) under the The User Settings Menu Group includes the following User Settings Menu Group to show the Controller Sensitivity function icons: function screen.
Page 278 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Five different sensitivity curves are available to select from Sensitivity curve 1 (default) is the most sensitive and (curves 1 through 5). Sensitivity curve 1 is the default curve sensitivity curve 5 is the least sensitive (Figure 4-156). and causes the function speed to increase or decrease equally with an equal amount of movement of the controller (Figure 4-154).
Page 279: Controller Speed
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Controller Speed Select the Controller Speed icon (1, Figure 4-157) under the User Settings Menu Group to show the Controller Speed function screen. 10254-4 FIGURE 4-157 The Controller Speed function screen (Figure 4-158) allows the operator to adjust the crane function speeds relative to the position of the controllers.
Page 280 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL 10254-59 Item Description Item Description Swing Speed Auxiliary Hoist Speed Boom Lift Speed Reset All Icon Main Hoist Speed FIGURE 4-158 A setting of 100% results in the crane function moving at full Press the Jog Dial or OK Button to accept the new rated speed relative to the position of the controller.
Page 281: Eco Mode
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES ECO Mode Select the ECO Mode icon (1, Figure 4-159) under the User Settings Menu Group to show the ECO Mode function screen. 9741-4 FIGURE 4-160 Item Description ON/OFF icon Idle Speed 1 Time Delay Setting 10254-4 FIGURE 4-159 Idle Speed 2 Time Delay Setting...
Page 282 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL The following terms are related to the ECO Mode function: Working Engine Speed using Increment/Decrement Switch. Term Definition Engine speed will automatically increase from idle to the Working Engine Speed when a craning ECO Mode is disabled and will ECO Mode OFF function is operated (controller is moved out of not control engine speed.
Page 283: Boom Position Indicator Light
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Boom Position Indicator Light S e l e c t t h e B o o m P o s i t i o n I n d i c a t o r L i g h t i c o n (1, Figure 4-162) under the User Settings Menu Group to show the Boom Position Indicator Light function screen.
Page 284 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL T h e E x h a u s t S y s t e m C l e a n i n g f u n c t i o n s c r e e n Press the Jog Dial or OK Button on the Navigation (Figure 4-165) allows the operator to initiate or inhibit the Control Pad to start the cleaning process.
Page 285: Service Menu
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Service Menu To inhibit, or prevent, the exhaust system from entering the active cleaning mode or to stop the exhaust cleaning Select the Service Menu icon (1, Figure 4-168) under the process that was manually initiated, do the following: User Settings Menu Group to show the Service Menu Using the Jog Dial or the Up/Down Arrow Buttons on the function screen.
Page 286: Display Settings Menu Group
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Display Settings Menu Group Display Screen Brightness Select the Display Screen Brightness icon (1, Figure 4-171) The Display Settings Menu Group includes the following under the Display Settings Menu Group to show the Display function icons: Screen Brightness function screen.
Page 287: Time Set
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Time Set Coordinated Universal Time (UTC) is used as the basis for setting the time. The usage of UTC is based upon a twenty Select the Set Time icon (1, Figure 4-173) under the Display four hour clock and the 0 degrees longitude meridian, Settings Menu Group to show the Time Set function screen.
Page 288: Using The Rated Capacity Limiter Display Module (Rdm)
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL USING THE RATED CAPACITY LIMITER “auxiliary boom nose installed” in the RCL. The predicted radius will be that of the main boom nose DISPLAY MODULE (RDM) and the mass of the auxiliary boom nose will be NOTE: Refer to Rated Capacity Limiter Display Module considered part of the load.
Page 289 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES When re-entering the rigging mode completely, you can • Confirm the selection. prevent already entered components from changing by Direction arrows appear on the display. making entries in the following order: Input mode is switched on. Counterweight (2, Figure 4-177) Selecting Values Boom system (1)
Page 290 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL After the selection procedure, there are three options: Enter the other components of the current rigging mode in the same way. • Cancel input mode: Counterweight Press the button (3, Figure 4-181) or (4) once – the •...
Page 291 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Boom System Outrigger Span • Select and confirm the symbol (1, Figure 4-183). • Select and confirm the symbol (1, Figure 4-184). • Use the buttons (2) or (3) to select the rigged outrigger span. •...
Page 292 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Overriding the Outrigger Monitoring System Swing Range The outrigger span is monitored when the Outrigger • Select and confirm the symbol (1, Figure 4-186). Monitoring System (OMS) is installed. You must check the • Use the buttons (2) or (3) to select the required swing outrigger span when entering the rigging code.
Page 293: Entering The Rcl Code
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Entering the RCL Code Selecting the Hoist and Entering the Reeving Entering the reeving does not have an effect on any other You may enter the RCL code for the rigging mode according component that has already been entered. to the Lifting capacity table.
Page 294 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Confirming and Applying the Rigging Code Entering the Telescoping Mode Number • Select the symbol (1, Figure 4-189). After the RCL has been initialized, and the rigging mode screen is re-entered, and the telescoping function has been •...
Page 295: Checks Before Operating The Crane
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Checks Before Operating the Crane Hoists Display Open the Menu The symbol bar symbol (1, Figure 4-192) must appear over top of the hoist with which the load is to be lifted. Crane operation is only enabled when the Monitoring menu is open.
Page 296 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Switch over the hoists as follows: • Switch off both hoists by selecting no hoist indicator. Switch on the auxiliary hoist indicator. The hoist indicator will now be displayed above the auxiliary hoist icon (1, Figure 4-194). WARNING Overload Hazard! When operating the crane with two hoists reeved, ensure...
Page 297: Displays During Crane Operation
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Displays During Crane Operation If the displayed RCL code does not apply to a lattice extension, nothing will be displayed. The following information is constantly displayed in addition to the displays of the rigging mode: Current Overall Height Overall height is the approximate vertical distance between the lower edge of the outrigger pad and the highest point of...
Page 298 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL The Current Swing Angle Currently Raised Load Shows the swing angle (1, Figure 4-198) of the current The display (Figure 4-200) shows the sum of the payload + superstructure position. lifting gear + hook block. 0°...
Page 299: Rcl Early Warning
GRT8120 OPERATOR MANUAL OPERATING PROCEDURES RCL Early Warning Display (3) shows the current degree of utilization, e.g. 100%; the bar is red. If approximately 90% of the maximum permissible load is The value on display (1) is equal to or greater than exceeded, an RCL early warning will be issued.
Page 300: Load Chart And Miscellaneous Alerts
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL The crane movements are reactivated when you have Momentary Limit Bypass Switch (Non-CE Certified returned to a normal operating state below the maximum Cranes), page 3-10 permissible load capacity – lamps (1, Figure 4-205) and (2) Limit Bypass Set-Up Switch (CE Certified Cranes), page go out.
Page 301 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES 10254-56a FIGURE 4-206 Grove 4-171 Published 3-22-2021, Control # 702-02...
Page 302 OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Item Description Graphic Explanation RCL Bypass Active Alert (Red - Constant Indicates the RCL system is bypassed Indicates that limiter systems have been bypassed by way of the Limit Bypass Switch located on the right overhead control panel. Bypass 1 Pressed Alert Refer to Momentary Limit Bypass Switch (Non-CE Certified Cranes), (Constant On)
Page 303 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES Item Description Graphic Explanation Indicates the radius is smaller than the minimum radius in the Radius Too Short Alert selected load chart. Indicates the load is smaller than the minimum load in the selected Load Too Small Alert load chart Boom - No Load Chart Indicates the main boom load chart is not available for the given...
Page 304: Hoist Camera
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL Hoist Camera The Hoist Camera View can also be set to show continuously in full screen on the RDM (Figure 4-209). The Hoist Camera View can be set to show on the Main The full screen view of the hoist camera is enabled in the Screen of the Rated Capacity Limiter Display Module (RDM).
Page 305 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES From the Menu Screen, select and confirm the Hoist Camera Icon (1, Figure 4-209) to open the full screen view of the hoist camera (2). 10254-58a FIGURE 4-209 Grove 4-175 Published 3-22-2021, Control # 702-02...
Page 306: Preload Check
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL PRELOAD CHECK With a load applied, fully retract the boom while keeping the hook block/overhaul ball at near ground level. After crane has been readied for service, an operational Once boom is fully retracted, raise block/ball up to boom check of all crane functions (with no load applied) should be tip.
Page 307 GRT8120 OPERATOR MANUAL OPERATING PROCEDURES AXIS OF ROTATION BOOM ANGLE HORIZONTAL 4605 OPERATING RADIUS TERMS TO KNOW FIGURE 4-210 A lifting diagram is included for over-side, over-rear, and boom must be extended to 18.9 m (62 ft) to reach a height of over-front lifting areas.
Page 308: Stowing And Parking
OPERATING PROCEDURES GRT8120 OPERATOR MANUAL STOWING AND PARKING 12. Set battery disconnect switch (1, Figure 4-211) to the OFF position if machine will be inactive for over 24 hours. DANGER Tipping Hazard! Never park crane near holes, on rocky surfaces, or on soft spots.
Page 309: Section 5
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION SECTION 5 SET-UP AND INSTALLATION SECTION CONTENTS Setup of Crane Before and After Transporting . . 5-2 Removing the Folding Boom Extension..5-34 Hoist Camera ......5-3 Erecting the 17.6 m (57.6 ft) Boom Extension .
Page 310: Setup Of Crane Before And After Transporting
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL 10086-1 Item Description Page Hoist Camera page 5-3 Hoist Platform page 5-4 Beacon Lights (Optional) page 5-5 Cab Mirrors page 5-6 RCL Light Tower (Optional) page 5-7 Access Ladders page 5-8 Outrigger Floats page 5-9 8994 Hydraulic Hose Drum (Optional) page 5-9...
Page 311: Hoist Camera
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Hoist Camera Lower the rear and side hoist platform railings. For more information, see Hoist Platform, page 5-4. The hoist camera (1, Figure 5-2) is located at the rear of the Raising the Hoist Camera for Operation superstructure.
Page 312: Hoist Platform
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Hoist Platform The hoist platform is located at the rear of the superstructure near the main and auxiliary hoists. Raise the hoist platform railings (1 and 2, Figure 5-3) when maintaining the hoists. The platform railings must be lowered prior to transport. Lowering the Hoist Platform Railings for Transport Lower the hoist camera.
Page 313: Beacon Lights (Optional)
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Beacon Lights (Optional) Lowering the Beacon Light for Transport Loosen the wing nut (2). Lower the beacon light (1). The optional beacon lights (1, Figure 5-4) can be installed as part of the optional Auxiliary Lighting and Convenience Tighten the wing nut (2) to secure the beacon light (1) in Package.
Page 314: Cab Mirrors
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Cab Mirrors behind the left side of the cab. The cab mirrors must be retracted for stowed and moved to working position for Figure 5-5 shows the working and transport positions for the operation. top (1) and side (2) cab mirrors.
Page 315: Rcl Light Tower (Optional)
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION RCL Light Tower (Optional) Install the pin (3) in the mounting bracket (4) and tower post. Secure the pin with the retaining clip (2). The RCL Light Tower (1, Figure 5-6) is an optional feature Extending the RCL Light Tower for Operation located on the front right of the crane cab.
Page 316: Access Ladders
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Access Ladders Install pins (2). Install retaining clips (3) to secure the pins. The access ladders (1, Figure 5-7) are located on the front Lowering the Access Ladder and rear outrigger boxes. The access ladders must be raised for transport and must be lowered during operation.
Page 317: Outrigger Floats
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Outrigger Floats Stowing an Outrigger Float for Transport NOTE: An outrigger float weighs approximately 30 kg The outrigger floats (1, Figure 5-8) are stowed on the (65.0 lbs). outrigger boxes. The outrigger floats must be stowed prior to transport.
Page 318: Installing Cable On The Hoist
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL INSTALLING CABLE ON THE HOIST Refer to Figure 5-9. DANGER Do not use platform for hauling passengers. Death or serious injury could occur. No storage of components is allowed on the platform. Only one person at a time is allowed on the platform. 8627 CAUTION If cable is wound from storage drum, rotate reel in same...
Page 319: Locking
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Locking DANGER Two-Block Hazard! To avoid death or serious injury, keep load handling devices away from the tip of the boom or boom extension when extending the boom and when hoisting up. If the A2B switch is locked (disabled), the hook block could hit the main boom head or extension.
Page 320 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL and the A2B switch weight must be mounted on the main Using the main hoist, pull hook block slowly against the boom. A2B switch weight. As soon as the hook block raises the weight, the acoustic alarm should be triggered, the A2B If the crane is operated with a main boom extension and the indicator should display, and the main hoist should main boom is equipped with a hoist rope, then the...
Page 321: Hoist Rope Reeving
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION HOIST ROPE REEVING 5-sheave hook block NOTE: 35 x 7 (rotation resistant) hoist rope is used on this crane. Within load and range chart limits and permissible line pull, multi-part line reeving allows the operator to raise a greater load than can be raised with a single line part.
Page 322: 3-Sheave Hook Block
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL 3-sheave hook block 1-sheave hook block FIGURE 5-13 FIGURE 5-14 Reeving Reeving 7-parts line 3-parts line 6-parts line 2-parts line 5-parts line 1-parts line 4-parts line 5-14 Published 3-22-2021, Control # 702-02...
Page 323: Hook Tackle
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Hook tackle 9137-1 FIGURE 5-17 FIGURE 5-15 Reeving 1-part line Auxiliary Boom Nose 9137-2 FIGURE 5-18 Reeving 1-part line 2-part line 9137 FIGURE 5-16 12-part line Grove 5-15 Published 3-22-2021, Control # 702-02...
Page 324 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL 8996-3 Boom Extension Shown at 45° Boom Extension Shown at 20° 8996-4 Offset Offset FIGURE 5-19 5-16 Published 3-22-2021, Control # 702-02...
Page 325: Quick Reeving The Hook Block
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Quick Reeving the Hook Block Aux Hoist Rope To quick reeve the hook block without removing the wedge socket on end of hoist rope, remove the retaining clips from Main the two pins (1, Figure 5-20), then lower the two rope guards Hoist Rope (2) to their lowered positions.
Page 326: Dead-End Rigging/Wedge Sockets
If alternate methods are selected, the user is responsible and should proceed in compliance with the regulations in force. If there are any questions, contact your local Grove distributor or Manitowoc Crane Care 5337 Do not mix components from different manufacturers. The...
Page 327 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Insert wedge in loop. Pull live end of rope until wedge dead end. DO NOT CLAMP LIVE END. U-bolt should bear and rope are snug inside socket. It is recommended against the dead end. Clip saddle should bear against the wedge be seated inside socket to properly secure the short extra piece.
Page 328: Boom Extension
The GRT8120 can be used with the following boom To use a single boom extension on several Grove cranes, extensions: contact Manitowoc Crane Care or your authorized Grove • 10.5 m to 17.6 m (34.5 ft to 57.6 ft) manual offsettable Distributor.
Page 329: General Warnings
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION General Warnings Boom Extension Pin Interlock Mechanism T h e b o o m e x t e n s i o n p i n i n t e r l o c k m e c h a n i s m (1, Figure 5-26) interlocks the front mounting pin (3) and boom installation pins (4) to ensure that the boom extension DANGER...
Page 330: Front Mounting Pin Handle
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Front Mounting Pin Handle • Handle up—The front mounting pin (3) is extended in th e fro nt mou nt in g b rac ke t an d t he bo om no se The front mounting pin handle (5, Figure 5-26) moves in installation pins (4) are unlocked.
Page 331: Boom Extension Mounting Brackets
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Boom Extension Mounting Brackets fly section is secured to the side of the main boom with the electrically actuated pin (2). NOTE: The fly section and boom extension base section • Front Boom Extension Mounting Bracket—Located must be connected together in the stowed position nearest the boom nose is the front boom extension to secure the boom extension to the side of the...
Page 332 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL 10088-5b 10088-2a 10088-1 Rear Front Item Description Rear Boom Extension Mounting Bracket Rear Boom Extension Pin Rear Mounting Pin Sensor 10088-3a Rear Boom Extension Side Sensor Boom Nose Sensor Front Boom Extension Mounting Bracket Front Mounting Pin Sensor Front Boom Extension Side Sensor...
Page 333: Boom Extension Sensors
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Boom Extension Sensors • Front Side Sensor (8, Figure 5-27)—Sends a signal to the crane control system when the boom extension base The front and rear boom extension mounting brackets section is against the front stowage bracket. feature the following sensors: •...
Page 334: About The Boom Extension Group In The Odm
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL About the Boom Extension Group in the Figure 5-29 shows the Boom Extension screen in the ODM. Table 5-2 describes the icons on the Boom Extension screen. For more information about the Alerts Area, Active Screen Indicator Area, and Status Bar, see Using the Operator Display Module (ODM), page 4-68.
Page 335: Accessing The Boom Extension Deployment/Stowage Function
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Table 5-2 Boom Extension Group Icons (Continued) Item(s) Icon Description 1 and 2 Boom Extension Rear or Front Mounting Pin Locked (Unselected) Rear Boom Extension Mounting Pin (pin #1). Front Boom Extension Mounting Pin (pin #2). 3 and 4 Boom Extension Rear or Front Mounting Pin Status: Locked 3 and 4...
Page 336: Boom Extension Alert And Warning Screens
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Boom Extension Alert and Warning Screens place. This can result in damage to the boom extension or boom extension stowage system. During the deployment and stowage of the boom extension, the Crane Control System (CCS) uses five proximity CAUTION sensors, in addition to the Boom Extension Pin Interlock Mechanism, to help ensure that the boom extension is...
Page 337 If additional assistance is needed, contact your Grove Distributor or Manitowoc Crane Care for help. Grove 5-29 Published 3-22-2021, Control # 702-02...
Page 338: Installing The Folding Boom Extension
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Installing the Folding Boom Extension Fully retract and lower the boom to horizontal. Attach a tag line to the end of the boom extension base section with the nose sheave. DANGER Make sure the connecting link (1, Figure 5-33) is in place that connects the fly section to the boom extension Boom Extension Hazard! base section.
Page 339 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION If necessary, raise the front mounting pin handle 11. Lower the front mounting pin handle (1, Figure 5-36) to (1, Figure 5-35) unlock boom extension lock the boom extension installation pins. installation pins. 9967 FIGURE 5-35 If necessary, turn the jack screw (3, Figure 5-39) clockwise to fully retract the boom extension installation...
Page 340 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Install the fourth pin. Secure the fourth pin with 15. If installing the hydraulic boom extension, connect retaining clip. hydraulic hoses. For more information, see Hydraulic Boom Extension Connections, page 5-52. 16. Remove the slings from the boom extension. CAUTION 17.
Page 341 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION 10088-7b FIGURE 5-39 Grove 5-33 Published 3-22-2021, Control # 702-02...
Page 342: Removing The Folding Boom Extension
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Removing the Folding Boom Extension Using a sling attached to an auxiliary crane, attach the auxiliary crane to the boom extension attaching points. For more information about attaching points for the sling, see Lifting Points, page 5-25. DANGER Attach a tag line to the end of the boom extension base Boom Extension Hazard!
Page 343: Erecting The 17.6 M (57.6 Ft) Boom Extension
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Connect boom extension electrical connectors. For more information, see Boom Extension Electrical Connections, page 5-51. DANGER If erecting a hydraulic boom extension, connect When removing the boom extension, make sure the boom hydraulic hoses. For more information, see Hydraulic extension is properly supported by the auxiliary crane and Boom Extension Connections, page 5-52.
Page 344 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Make sure the connecting link (1, Figure 5-43) is in place that connects the fly section to the boom extension base section. 8969-23 FIGURE 5-44 10. Tie a tag line to the end of the boom extension base section.
Page 345 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION 12. Detach fly section from main boom base by doing the Use the ODM control pad arrow buttons or jog dial following: to highlight the unlock icon. T h e u n l o c k i c o n i s h i g h l i g h t e d ( o r a n g e ) Remove retaining clip (1, Figure 5-46) from pin (2) (Figure 5-48).
Page 346 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL b. Press and hold the OK on the ODM control pad or press down on the jog dial. The lock status icon turns yellow, indicating the pin DANGER is retracted. The boom extension is displayed as Crush Hazard d e t a c h e d f r o m t h e s i d e o f t h e m a i n b o o m (Figure 5-52).
Page 347: Erecting The Fly Section
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION 20. Install four pins (5, Figure 5-39) and retaining clips (6) to secure the boom extension to the boom nose. If necessary, use the jack (1, Figure 5-53) to install the fourth pin: 10035-9 FIGURE 5-54 22.
Page 348 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL fly section and the boom extension base section together. 8969-23 FIGURE 5-56 FIGURE 5-58 8969-22 Tie a tag line to the end of the fly section. Detach the fly section from the boom extension base section by removing the retaining clip (2, Figure 5-55) DANGER and pin (3) securing the connecting link (1) to the boom...
Page 349: Stowing The Fly Section
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION end of the fly section. For more information, see Remove the retaining clip and pin (3, Figure 5-60) that is Anemometer/Boom Position Light (Optional), page 5-63. inserted in to the left side fittings (1, 2). Place the pin in its holder on the boom extension base section and Remove the tag line from the end of the fly section.
Page 350: Stowing The 17.6 M (57.6 Ft) Boom Extension
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Disconnect the electrical connections between the boom Use this procedure to stow the boom extension to the side of extension base section and the fly section: the main boom. NOTE: This procedure assumes the fly section is stowed on the boom extension base section.
Page 351 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION 10088-9a Stowed 10088-8a Deployed FIGURE 5-64 Make sure rear boom extension ramp (3, Figure 5-64) is in erected position. If the ramp is not erected, retract the retaining pin (1) DANGER from the bracket (2) to release the rear boom extension Boom Extension Hazard! ramp (3) from the stowed position.
Page 352 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL b. Press and hold the OK on the ODM control pad or press down on the jog dial. Pin #2 is extended. The pin status indicator icon DANGER turns green when the pin is fully extended and the When stowing the boom extension, make sure that all boom extension is displayed in the intermediate personnel and equipment are kept clear of the swing path.
Page 353: Erecting The 10.5 M (34.5 Ft) Boom Extension Base Section Only
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION 10035-12 Use the ODM control pad arrow buttons or jog dial to highlight lock icon. The lock icon highlights (orange). b. Press and hold the OK on the ODM control pad or press down on the jog dial. The lock status indicator icon turns green, indicating the pin is extended.
Page 354 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL NOTE: This procedure assumes the boom extension and In the ODM, verify that the front (Pin #2) and rear (Pin fly section are installed on the side of the main #1) boom extension pins are securely installed. Visually boom.
Page 355 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION 11. Remove retaining clip (1, Figure 5-67) and pin (2) to Use the ODM control pad arrow buttons or jog dial detach the boom extension base section from the fly to highlight unlock icon. section.
Page 356: Stowing The 10.5 M (34.5 Ft) Boom Extension Base Section Only
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL 17. Install four pins (5, Figure 5-39) and retaining clips (6) to 22. Remove the anti-two block switch from the main boom secure the boom extension to the boom nose. If nose. For more information, see Anti-Two Block (A2B) necessary, use the jack (1, Figure 5-68) to install the Switch, page 5-10.
Page 357 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION If necessary, adjust the boom extension offset to 0° depending on the type of boom extension: • If stowing a mechanical boom extension, make sure CAUTION the offset is set to 0°. For more information, see After removing the four retaining clips and pins, the boom Offsetting the Mechanical Boom Extension, page extension is free to swing to the side of the main boom.
Page 358 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL b. Press and hold the OK on the ODM navigation pad or press down on the jog dial. When front extension pin is locked, the status indicator show a green lock icon. 10035-13 10088-15a FIGURE 5-70 15.
Page 359: Boom Extension Electrical Connections
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Boom Extension Electrical Connections Wind the cable around the storage location (3) such that it will not be damaged during crane operation. Use the following procedures to disconnect and connect the Disconnecting Electrical Connection at Boom Nose boom extension electrical connections at the boom nose.
Page 360: Hydraulic Boom Extension Connections
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Hydraulic Boom Extension Connections Locking the Drum Turn the hose drum until a hole is aligned with the latch Use the following procedures to connect and disconnect the (2, Figure 5-73). optional hydraulic boom extension to the main boom. Rotate the latch (2) counterclockwise to position (B), Disconnect and retract the hydraulic lines from the boom until the latch fully engages the hole.
Page 361: Establishing The Hydraulic Connection
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Fold down the guide sheaves (2) and secure them with Establishing the Hydraulic Connection the hinged pins (1). If necessary, bring the connections (1, Figure 5-76) into the position for boom extension operations. Remove the hose line (2) from the clamp (4). Feed the hose lines towards the left hand side through the lower opening (3) in the boom extension base section under the boom head.
Page 362: Disconnecting The Hydraulic Connection
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Disconnecting the Hydraulic Connection Remove the hose lines (2, Figure 5-77) from the connections (1). Close off the hose lines and the connections (1) with the protective caps. Secure hoses in holder (3) on the boom extension base section.
Page 363: Reeving The Hoist Rope
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Reeving the Hoist Rope Remove the retaining clips and rope retaining pins (1, Figure 5-78). Use the following to reeve the hoist rope on the mast sheave Guide the rope over the mast sheave (3), and over the assembly.
Page 364: Offsetting The Mechanical Boom Extension
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Offsetting the Mechanical Boom Extension Refer to Figure 5-79. The GRT8120 boom extension features manual offset or - 0° hydraulic offset. The standard boom extension can be offset manually to 0°, 20°, or 45°. The hydraulic boom extension can be offset from 0°...
Page 365: Setting The Offset Angle Without An Auxiliary Crane
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Setting the Offset Angle without an Auxiliary Crane The superstructure must be in a working position permitted by the Load Chart for the RCL rigging code that was entered. If an auxiliary crane is not available, the extension head must Inclining the Crane rest on the ground before the angle is changed.
Page 366: Anti-Two Block Switch On The Boom Extension
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Anti-Two Block Switch on the Boom Remove the retaining clip from the mounting pin and remove the anti-two block switch assembly. Extension The anti-two block switch can now be moved to another Use the following procedures to install and remove the location and connected.
Page 367: Folding Mast Sheave
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Folding Mast Sheave Hold the mast sheave by the handle (2, Figure 5-82) and pull out the pin (1). Use the following procedures to erect and stow the mast sheave on the boom extension base section. Erecting the Mast Sheave The mast sheave shall be erected when the boom extension is used.
Page 368: Auxiliary Single Sheave Boom Nose
The auxiliary single-sheave boom nose should only be Use an auxiliary crane attached to the lifting eye (3) on adjusted by your Grove distributor or Manitowoc Crane the auxiliary boom nose and lift it to the front of the main Care.
Page 369: Removing The Auxiliary Single-Sheave Boom Nose
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Working Position Intermediate Position Transport Position FIGURE 5-85 8994-1 Removing the Auxiliary Single-Sheave Boom Nose Attach an auxiliary crane to the lifting eye of the boom nose. In the working position, the auxiliary single-sheave boom nose is positioned in front of the main boom head and is Remove the retaining clips and remove all the pins out of the bores and lugs.
Page 370: Rigging The Auxiliary Single-Sheave Boom Nose
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL RIGGING THE AUXILIARY SINGLE-SHEAVE Remove the retaining clip and take out the pin (6). BOOM NOSE Swing the auxiliary boom nose into position in front of the main boom head. Insert pins (3) into the lugs and Rigging in Transport Position secure with the retaining clips.
Page 371: Anemometer/Boom Position Light (Optional)
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION ANEMOMETER/BOOM POSITION LIGHT Switching the boom position indicator light on and (OPTIONAL) Select symbol (1, Figure 5-87) and To switch on: confirm – symbol ON is displayed CAUTION Select symbol (2) and confirm – symbol To switch off: Machine Damage! OFF is displayed...
Page 372 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Removing Remove the rod with the anemometer/boom position indicator light before driving on the road. • Switch off the boom position indicator light. • Remove the plug and close the sockets (4, Figure 5-88) and (5) with the protective caps.
Page 373 GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Item Description Mounting Arm Holder Clamps Anemometer Connector A2B Switch Connector Boom Position Light Connector 10023 10012 10013 FIGURE 5-89 Grove 5-65 Published 3-22-2021, Control # 702-02...
Page 374: Counterweight Removal And Installation
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL COUNTERWEIGHT REMOVAL AND Counterweight is installed and removed using hydraulic cylinders controlled by a counterweight control panel located INSTALLATION on each side of the superstructure. The counterweight assembly is held in place by a hydraulic cylinder and locking pins with pin clips.
Page 375: Counterweight Control Panel
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Counterweight Control Panel Flashing green LED (1) indicates main power is on. Enable and Horn buttons are illuminated and active. Counterweight control panels are located on each side of the Three LED’s above each button indicate: superstructure between the boom pivot and main hoist.
Page 376: Removing The Counterweight
SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL Removing the Counterweight CAUTION Refer to Figure 5-91. To prevent machine damage, make sure that the Lock Cylinder Pins are fully retracted and the counterweight is CAUTION hanging freely from the lifting cylinders before lowering When raising or lowering the counterweight, make sure the counterweight that the weight remains level by using the left and right...
Page 377: Installing The Counterweight
GRT8120 OPERATOR MANUAL SET-UP AND INSTALLATION Installing the Counterweight Refer to Figure 5-91. DANGER Hand Crushing Hazard! CAUTION Do not place hand between counterweight cylinders and When raising or lowering the counterweight, make sure the top of the counterweight while cylinders are in motion. that the weight remains level by using the left and right cylinder control buttons Press and release Enable button (2).
Page 378 SET-UP AND INSTALLATION GRT8120 OPERATOR MANUAL THIS PAGE BLANK 5-70 Published 3-22-2021, Control # 702-02...
Page 379 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION SECTION 6 MAINTENANCE AND LUBRICATION SECTION CONTENTS General ........6-2 Steering and Suspension –...
Page 380: General
Do not apply chassis grease lubricants with air pressure crane. Additional copies are available through the Grove devices, as chassis contains sealed fittings. distributor network or Manitowoc Crane Care. Use of non-approved lubricant may damage components Refer to your Service Manual for specific maintenance and and/or invalidate published lubricant intervals.
Page 381 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Standard Lubricants Standard lubricants are used on all Grove cranes. Cranes can also be ordered with Cold Weather lubricants. The Standard lubricants listed in Table 6-1 are effective in ambient temperatures down to -9°C (+15°F). Table 6-1 : Standard Lubricants [Down to -9°C (+15°F)] Recommended Lubricant Lubricant/Fluid...
Page 382 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Table 6-1 : Standard Lubricants [Down to -9°C (+15°F)] Recommended Lubricant Lubricant/Fluid Grove Spec. Type Grade Classification Fleetguard StableGuard™ Urea 32 Premix Diesel Exhaust Fluid (DEF) 80019225 AdBlue® TerraCair Ultrapure® DEF Citgo Lithoplex CM2 NLGI 2 Extreme Pressure 3% Moly Mobil Mobilgrease CM-P...
Page 383: Arctic Lubricants And Conditions
-40°C (-40°F). Refer to Table 6-3 for a list of these check with an authorized Grove distributor or Manitowoc recommended Cold Weather lubricants. Crane Care.
Page 384 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Table 6-2 : Cold Weather Lubricants in Arctic Conditions [Down to -29°C (-20°F)] Recommended Lubricant Lubricant/Fluid Grove Spec. Type Grade Classification CITGO Synthetic Gear Lube Eaton Roadranger EP Mobil Mobilube SHC OEM Meritor Mobil Delvac Synthetic Gear 076N Synthetic Axle Gear Oil 6829014058...
Page 385 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Table 6-2 : Cold Weather Lubricants in Arctic Conditions [Down to -29°C (-20°F)] Recommended Lubricant Lubricant/Fluid Grove Spec. Type Grade Classification Mobil Mobilith SHC 220 Extreme Pressure 3% Moly 6829104275 NLGI 2 Petro-Canada Precision Grease Synthetic EP1 Windshield Washer fluid...
Page 386 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Table 6-3 : Cold Weather Lubricants in Arctic Conditions [Down to -40°C (-40°F)] Recommended Lubricant Lubricant/Fluid Grove Spec. Type Grade Classification Fleetguard DCA4 Liquid Coolant Conditioner 6829012858 Fleetguard DCA2 Penray Pencool 3000 Fleetguard StableGuard™ Urea 32 Premix Diesel Exhaust Fluid (DEF) 80019225...
Page 387: Cylinder Rod Surface Protection
Boeshield® T-9 Premium Metal Protectant. (1 lb) grease gun equals 28 grams (1 oz) of EP-MPG. Manitowoc Crane Care has Boeshield® T-9 Premium Metal Over-lubrication on non-sealed fittings will not harm fittings Protectant available in 12 oz. aerosol cans by ordering part or components, but under-lubrication will definitely lead to a number 9999101803 through the Parts Department.
Page 388: Cranelube
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL CraneLUBE Safety Grove highly recommends use of Manitowoc CraneLUBE lubricants to increase crane reliability and performance. Contact your Grove distributor for information about the WARNING Manitowoc CraneLUBE lubrication program. Crushing Hazard! Cummins Oil Registration List Movement of the superstructure the boom, and outriggers may create a crushing and/or pinching hazard.
Page 389 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Table 6-4 : Approved Lubricant Reference Table Lube Specification Lube Specification Lube Specification Ref. Approved Lubricant Down To -9˚C Down To -29˚C Down To -40˚C (+15˚F) (-20˚F) (-40˚F) Extreme Pressure Multipurpose Grease 6829003477 6829104275 6829104275 Gear Lube (GL-5) 6829014058...
Page 390: Drive Train
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Drive Train REPLACE air When engine fault Engine Air cleaner filter shows in ODM Cleaner Filter for QSBT4F-275 HP See NOTE 3. See NOTE 1.
Page 391 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application NOTE 8: Engine Oil Fill (3 ) is on top of the valve cover. Engine Oil Filter (3 ) is located on inside left side of the frame, adjacent to the engine.
Page 392 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Drive Train (Continued) PERFORM every REPLACE fuel filter 500 hours of service, Fuel Filter Figure 6-2 — — or 6 months, which- See NOTE 10.
Page 393 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application CAUTION Possible Equipment Damage! Do not operate torque converter at stall condition for longer than 30 seconds at one time. Shift to neutral for 15 seconds, and repeat procedure until desired fluid temperature is reached.
Page 394 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Drive Train (Continued) REPLACE filter PERFORM after first 50 hours of service See NOTE 14. REPEAT after REPLACE filter another 50 hours of Transmission and service for a total of See NOTE 14.
Page 395 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION FRONT 10024-02 SIDE VIEW OF CARRIER 10024-02c RIGHT SIDE OF CARRIER (TRANSMISSION DIPSTICK) FIGURE 6-3 10024-02b 10024-02a LEFT REAR SIDE OF CARRIER LEFT UNDERSIDE OF CARRIER FIGURE 6-4 Grove 6-17 Published 3-22-2021, Control # 702-02...
Page 396: Steering And Suspension - Meritor Axles
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Steering and Suspension – Meritor Axles Lockout Cylinder Every 500 hours, or LUBRICATE Until grease Pivot Pins Figure 6-5 3 months, whichever 2 fittings per axle, extrudes interval comes first...
Page 397 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-03 MERITOR AXLE FIGURE 6-5 10024-04 KESSLER AXLE FIGURE 6-6 Grove 6-19 Published 3-22-2021, Control # 702-02...
Page 398: Steering And Suspension - Fifth Wheel Pivots
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Steering and Suspension – Fifth Wheel Pivots LUBRICATE Every 500 hours, or Fifth Wheel Until grease 2 service points Figure 6-7 3 months, whichever Pivot Pins extrudes...
Page 399 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-05 FIFTH WHEEL PIVOTS FIGURE 6-7 Grove 6-21 Published 3-22-2021, Control # 702-02...
Page 400: Axle Lubrication - Meritor Axles
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Axle Lubrication – Meritor Axles Every 250 hours, or CHECK and FILL 1 month, whichever 2 service points interval comes first (10.6 gal) ea DRAIN and FILL NOTE 20.
Page 401 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-06 MERITOR DRIVE AXLE – FRONT VIEW FIGURE 6-8 LEGEND - OIL FILL - OIL DRAIN 10024-06a MERITOR AXLE SIDE VIEW – AXLE HUB – PLANETARY DRAIN AND FILL PORTS FIGURE 6-9 Grove 6-23 Published 3-22-2021, Control # 702-02...
Page 402: Axle Lubrication - Kessler Axles
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Axle Lubrication – Kessler Axles Every 100 hours, or CHECK and FILL 1 month, whichever 2 service points interval comes first PERFORM after first (9.8 gal) ea DRAIN and FILL...
Page 403 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-07 KESSLER DRIVE AXLE – FRONT VIEW 10024-07a KESSLER DRIVE AXLE DETAIL VIEW FIGURE 6-10 Grove 6-25 Published 3-22-2021, Control # 702-02...
Page 404: Turntable (Swing Drive) And Cab Tilt Lubrication
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Turntable (Swing Drive) and Cab Tilt Lubrication CHECK oil level After first 50 hours FILL swing drive of service gearbox brake Thereafter, every assembly to 50 hours of service,...
Page 405 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Turntable (Swing Drive) and Cab Tilt Lubrication – Continued NOTE 30: Apply grease to six (6) fittings at front of superstructure. Then rotate superstructure 90° and apply grease to fittings once more.
Page 406 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Turntable (Swing Drive) and Cab Tilt Lubrication – Continued SPRAY ON Every 500 hours, or LUBRICATION Turntable Swivel 6 months of service, Figure 6-12 SPRAY ON 1 service point...
Page 407 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-10 UNDERSIDE OPERATOR CAB DOOR TRACK AND ROLLERS FIGURE 6-13 10024-09 REAR OF OPERATOR CAB – AIR CONDITIONER CONDENSER FILTER FIGURE 6-14 Grove 6-29 Published 3-22-2021, Control # 702-02...
Page 408: Outrigger Lubrication
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Outrigger Lubrication BRUSH ON beam top plate as beam Every 50 hours, or is fully extended. Outrigger Beams 1 week of service, Figure 6-15 Brush on See NOTE 35.
Page 409 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-13 OUTRIGGER BOX 10024-13a OUTRIGGER BOX INTERIOR FIGURE 6-15 Grove 6-31 Published 3-22-2021, Control # 702-02...
Page 410: Lift Cylinder Lubrication
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Lift Cylinder Lubrication LUBRICATE 1 grease fitting, Every 500 hours, or Lower Lift Until grease 1 service point Figure 6-16 3 months, whichever Cylinder Pivot Pin extrudes...
Page 411: Boom Lubrication
GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Boom Lubrication READ FIRST! IMPORTANT CRANE SET-UP INFORMATION! With crane set on a firm level surface and a minimum 29,200-lb counterweight installed, fully extend the outriggers, and level the crane. Center the boom over the front of the crane, engage the turntable swing lock pin, and disable the swing function. Fully retract the boom and set boom angle to 70°.
Page 412 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Telescope Section 5 (Tele 5) Telescope Section 3 (Tele 3) Make sure that the tele cylinder is locked to Tele 5. Make sure that the tele cylinder is locked to Tele 3. Extend and lock Tele 5 to the 100% pinning location. Extend and lock Tele 3 to the 100% pinning location.
Page 413 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION Telescope Section 1 (Tele 1) Grease locking pins on both sides (2, Figure 6-17). NOTE: To grease the rear upper wear pads of Tele 1 at the Make sure that the tele cylinder is locked to Tele 1. or 89% pinning locations, extend and lock Tele 1 to Extend and lock Tele 1 to the 100% pinning location.
Page 414: Boom Lubrication (Continued)
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Boom Lubrication (Continued) Hook Block, CHECK sheaves on 1 Sheave, Swivel each of four (4) Bearing – 26MT hook blocks listed CHECK sheaves Hook Block, for dry points of...
Page 415 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-15 10024-16 10024-17 10024-18 10024-19 10024-20 HOOK BLOCKS, OVERHAUL BALL, OVERHAUL CYLINDER FIGURE 6-18 10024-21 TELESCOPIC SECTION SLIDE FRONT FACES FIGURE 6-19 Grove 6-37 Published 3-22-2021, Control # 702-02...
Page 416 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Boom Lubrication (Continued) Only until Every 500 hours, or LUBRICATE Tele 6 Rear Upper Figure 6-20 resistance 6 months, whichever 2 service points Wear Pad is felt...
Page 417 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-22 LEFT SIDE BOOM – REAR UPPER WEAR PADS AND LOCK PINS FIGURE 6-20 Grove 6-39 Published 3-22-2021, Control # 702-02...
Page 418 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Boom Lubrication (Continued) Every 500 hours, or Coat areas Tele Cylinder Sled 6 months of service, BRUSH ON Figure 6-21 that the wear Wear Pad whichever interval...
Page 419 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-24 10024-23 TELE CYLINDER WEAR PAD BOOM EXTENSION SCREW 10024-25 BOOM EXTENSION FIGURE 6-21 Grove 6-41 Published 3-22-2021, Control # 702-02...
Page 420 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Interval Service Item Figure No. Description Lubricants Capacity Application Boom Lubrication (Continued) Every 250 hours, or 3 months of service, LUBRICATE Boom Extension whichever interval 2 service points Figure 6-22 Brush on Attachment Pins comes first...
Page 421 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 10024-24a 10299 FIGURE 6-22 Grove 6-43 Published 3-22-2021, Control # 702-02...
Page 422: Hoist Lubrication
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Approximate Service Item Figure No. Service Interval Description Lubricant Capacity Application Hoist Lubrication CHECK oil level 2 service points REMOVE vent or hose from top of the sight glass to FILL Every 50 hours of FILL hoist drums service, or weekly,...
Page 423 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION HOIST DRUM – RIGHT SIDE HOIST DRUM – LEFT SIDE HOIST DRUMS – (MAIN and AUXILIARY) FIGURE 6-23 Grove 6-45 Published 3-22-2021, Control # 702-02...
Page 424: Hydraulics Lubrication
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Lube Point Approved Lube Item Figure No. Lube Interval Application Description Lubricant Capacity Hydraulics Lubrication REPLACE hydraulic REPLACE hydraulic filter element filter when restriction Hydraulic Filter Figure 6-24 — — indicator gauge on the See NOTE 53.
Page 425 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 9900-26a HYDRAULIC TANK FIGURE 6-24 Grove 6-47 Published 3-22-2021, Control # 702-02...
Page 426: Rust Protection
MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL RUST PROTECTION In addition to the factory-applied treatment, Grove crane owners must provide proper maintenance and care to help Protecting Cranes From Rusting ensure long-term protection of their crane against corrosion. This procedure provides information and guidelines to help Grove cranes are manufactured to high quality standards, maintain the paint finish on Grove cranes.
Page 427: Cleaning Procedures
- t y p e s c r a t c h r e m o v e r. I t i s Manitowoc Crane Care recommends washing the crane at recommended that a good coat of automotive wax be least monthly to remove all foreign matter.
Page 428: Application
Depending on the environment in which a crane is used ladders/steps and all crane access areas, as necessary. ® and/or stored, initial factory application of Carwell Contact your local Grove distributor or Manitowoc Crane (CP-90) should help inhibit corrosion for approximately Care should you have any questions. 12 months.
Page 429 GRT8120 OPERATOR MANUAL MAINTENANCE AND LUBRICATION 7650-75 Picture may not be same model as your crane, it is Figure 6-25 for reference only. Grove 6-51 Published 3-22-2021, Control # 702-02...
Page 430 MAINTENANCE AND LUBRICATION GRT8120 OPERATOR MANUAL Picture may not be same model as your crane, it is for reference only. Figure 6-26 Table 6-1 Rust Inhibitor Application Locations Boom Extension Pins, Clips Entire underside of crane Boom Nose Pins, Clips Turntable Bearing Fasteners Hook Block/Overhaul Ball Powertrain Hardware Inside Compartment...
Page 431: Appendix 1 - Decals
GRT8120 OPERATOR MANUAL APPENDIX 1 DECALS Figure A-1 shows the locations of the decals on the GRT8120. Published 3-22-2021, Control # 702-02...
Page 432 10087-1 FIGURE A-1 Published 3-22-2021, Control # 702-02...
Page 433 10087-2 FIGURE A-1 continued Published 3-22-2021, Control # 702-02...
Page 434 10087-3 FIGURE A-1 continued Published 3-22-2021, Control # 702-02...
Page 435 10087-4 FIGURE A-1 continued Published 3-22-2021, Control # 702-02...
Page 436 FIGURE A-1 continued 10087-5 Published 3-22-2021, Control # 702-02...
Page 437 10087-6 FIGURE A-1 continued Published 3-22-2021, Control # 702-02...
Page 438 GRT8120 OPERATOR MANUAL Table A-1 — Legend for Figure A-1 (Continued) Table A-1 — Legend for Figure A-1 Item Description Item Description CAUTION–Trans Damage Reflector Striping No Step Nameplate, Crane DANGER–Super Structure Swing Hazard Patent Symbol ID Swing (Single Axis) Armrest Adjustment Swing/Aux Hoist (Dual Axis) CAUTION–Armrest Position...
Page 439 Boom Extension Wiring Connect 2 Boom Extension Wiring Connect 3 Boom Extension Wiring Connect GRT8120 ID GRT8120 Grove 6.5’’ Gray Grove 7.7’’ Gray Grove 5’’ White Chevron, Outrigger Jack Manitowoc Gray/Red-3’’ Grove 4.5’’ Gray CAUTION–Fluids Special Lube Fuel Published 3-22-2021, Control # 702-02...
Page 440 GRT8120 OPERATOR MANUAL THIS PAGE BLANK A-10 Published 3-22-2021, Control # 702-02...
Page 441: Word Index
GRT8120 OPERATOR MANUAL WORD INDEX Numerics 17.6m, Stowing ............5-42 About the ODM ............5-26 10.5m Boom Extension Accessing ODM Screen ..........5-27 Erecting ..............5-45 Anti-Two Block Switch ..........5-58 Stowing ..............5-48 Electrical Connections ..........5-51 120V/220V Engine Block Heater and Outlet ....3-44 Fly Section, Erecting ..........5-39 12-Volt Outlet ............3-15 3-16...
Page 442 Decals ................A-1 Power ..............3-53 Degree Indicator ............3-56 Right Side Motion ........... 3-53 Diagnostics Swing ............3-53 3-54 Manitowoc Mobile Application ......4-141 Swing Brake Release ........3-21 3-25 Diagrams, Reeving ............5-13 Buzzer ..............3-34 3-37 Dial, Jog .............. 3-21 3-22 Differential Lock Operation ..........4-18...
Page 443 GRT8120 OPERATOR MANUAL Fuse and Relay Panel (In Cab) ......3-34 3-36 Emergency Stop (On Remote Control Unit) ...3-56 Enable ..............3-56 Engine Wait-To-Start ........3-7 Internal Temperature Warning ...... 3-17 3-19 Grab Handles ..........3-32 3-33 3-49 Left Motion Command ..........3-56 Parking Brake (On Remote Control Unit) ....3-56 RCL Early Warning ........
Page 444 Service Brake ..........3-29 3-30 Main Hoist Rope, Lowering and Raising ....... 4-47 Swing Brake ..........3-29 3-30 Manitowoc Throttle ............3-29 3-30 Mobile Application, Diagnostics Codes ....4-141 Pin Interlock Mechanism, Boom Extension ....5-21 Manual Holder, User ..........3-34 3-35 Boom Nose Installation Pins ........5-21...
Page 445 GRT8120 OPERATOR MANUAL Rope, Hoist ..............5-55 Auxiliary Light ..........3-13 3-14 RPM Indicator ............... 3-56 Battery Disconnect ..........3-45 Boom Lift Enable/Disable ......3-21 3-23 Boom Mounted Lights (Optional) ...... 3-7 Boom Mounted Lights Motor (Optional) .... 3-7 Seat Adjustment Control Panel ......3-21 3-25 Boom Telescope Enable/Disable ....
Page 446 GRT8120 OPERATOR MANUAL Extended ..............4-16 Forward ..............4-16 Vents, Heater/Air Conditioner ... 3-13 3-14 3-21 3-22 General Information ..........4-12 Visor, Sun ............3-32 3-33 on Slopes ............... 4-14 Reverse ..............4-17 Towing/Pulling ............4-13 Wait-To-Start Indicator, Engine ....... 3-7 with Boom Extension Erected ........

Manitowoc Grove GRT8120 Operator's Manual

Quick Links

Related Manuals for Manitowoc Grove GRT8120

Summary of Contents for Manitowoc Grove GRT8120