Manitowoc National Crane NBT50L Series Operator's Manual
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Manitowoc National Crane NBT50L Series Operator's Manual

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National Crane NBT50L Series
Operator Manual
9695

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Summary of Contents for Manitowoc National Crane NBT50L Series

  • Page 1 National Crane NBT50L Series Operator Manual 9695...
  • 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 An untrained operator subjects himself and others to death or serious injury. Do not operate this crane unless: • You have been trained in the safe operation of this crane. Manitowoc is not responsible for qualifying personnel • You read, understand, and follow the safety and operating recommendations contained in the crane manufacturer’s manuals and...
  • Page 4 THIS PAGE BLANK...

  • Page 5: Table Of Contents

    NBT50L SERIES OPERATOR MANUAL TABLE OF CONTENTS SECTION 1 ..........Introduction General .
  • Page 6 TABLE OF CONTENTS NBT50L SERIES OPERATOR MANUAL Lifting ............2-33 Hand Signals .
  • Page 7 NBT50L SERIES OPERATOR MANUAL TABLE OF CONTENTS Diagnostic Connector—Display USB-B Port......3-15 PC1 Interface Connector .
  • Page 8 TABLE OF CONTENTS NBT50L SERIES OPERATOR MANUAL Activating the Crane Remote Control ........3-34 Camera System (Optional) .
  • Page 9 NBT50L SERIES OPERATOR MANUAL TABLE OF CONTENTS Lubrication Points ............5-3 Internal Cable Sheave Lubrication .
  • Page 10 About Faults and Real-Time I/O Diagnostics......7-22 About the Manitowoc Diagnostic Code Mobile Application ....7-23...

  • Page 11: Section 1

    If you are the new owner of a National Crane, please register local regulations, safety codes or insurance requirements. it with Manitowoc Crane Care so we have the ability to The NBT50L Series cranes have been designed for h t t p s : / / c o n t a c t y o u i f t h e n e e d a r i s e s .
  • Page 12 INTRODUCTION NBT50L SERIES OPERATOR MANUAL 9734 FIGURE 1-1 NBT55L Shown. Your crane may be different. Published 09-04-2019 Control # 664-02...
  • Page 13 NBT50L SERIES OPERATOR MANUAL INTRODUCTION FIGURE 1-2 9589 9590 9591 9592 7450 Item Component Item Component Cab Crane Controls (Inside Cab) Turret Bearing Hoist Rope RCL, Display Screen (Inside Cab) Ground Outrigger Control Rated Capacity Limiter (RCL) Reel Hydraulic Pump Boom Cab Outrigger Control (Inside Cab) Boom Nose...
  • Page 14 Care. 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 local National Crane distributor or Manitowoc Crane Care. Published 09-04-2019 Control # 664-02...

  • Page 15: Safety Messages

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS SECTION 2 SAFETY PRECAUTIONS SECTION CONTENTS Safety Messages......2-1 Environmental Protection.

  • Page 16: General

    National Crane distributor must be immediately advised of the incident and consulted on necessary inspections and repairs. Should the distributor not be immediately available, contact should be made directly with Manitowoc Product CAUTION Safety at the address below. The equipment must not be...

  • Page 17: Operator Qualifications

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS The Operator Manual supplied with and considered part of Make sure that all personnel working around the equipment your equipment must be read and completely understood by are thoroughly familiar with safe operating practices. You each person responsible for assembly, disassembly, must be thoroughly familiar with the location and content of operation and maintenance of the equipment.

  • Page 18: Operational Aids

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL Training is ESSENTIAL for proper equipment operation. • When a Boom Angle or Radius Indicator is inoperative Never jeopardize your own well-being or that of others by or malfunctioning, the radius or boom angle shall be attempting to operate a equipment on which you have not determined by measurement.

  • Page 19: Anti-Two-Blocking Device

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Anti-Two-Blocking Device to prevent two-blocking the boom tip(s) and the hook block, etc. The closer the load is carried to the boom nose the more This equipment should have a functional Anti-Two-Block and important it becomes to simultaneously let out hoist rope as Control Lock-Out System.

  • Page 20: Load Charts

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL Load Charts Load Charts represent the absolute maximum allowable loads, which are based on either tipping or structural limitations of the equipment under specific conditions. Knowing the precise load radius, boom length, and boom angle should be a part of your routine planning and operation.

  • Page 21: Wind Speeds

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS NOTE: The wind speed corresponding to the Beaufort scale in the table is mean wind speed at 10 m (33 ft) elevation over a period of 10 minutes. Table 2-1 Beaufort Wind Scale Maximum Wind Speed Beaufort Visible Indicator Description...
  • Page 22 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL 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 23 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS 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 24 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL 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)
  • Page 25 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Table 2-2 Wind Drag Coefficient Maximum Permissible Wind Speed If the wind resistant area of the load Awr is greater than (load) Shape the allowable wind resistant area Awr , the ratio can be (allow) used to determine a permissible wind speed V(z) for the load 1.1 to 2.0...
  • Page 26 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL Rated Load Chart Example - Metric 8383-1 FIGURE 2-3 2-12 Published 09-04-2019 Control # 664-02...
  • Page 27 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS 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 28 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL At wind speeds greater than 13.4 m/s, it is not permissible to lift a load greater than 12,040 kg, even if the wind resistance Load example 1.3a: area of the load is less than 14.45 m With large wind resistance area of the load Awr (load) Refer to the information from the above equipment...
  • Page 29 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS 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 30 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL Rated Load Chart Example - Non-metric 8382-1 FIGURE 2-4 2-16 Published 09-04-2019 Control # 664-02...
  • Page 31 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Refer to the above equipment configuration for the following load conditions: Example and Sample Calculations (Non-metric) Load example 2.1: The following example illustrates how to calculate allowable load while operating in wind speed (3-second wind gust With known Wind Drag Coefficient of the load Cd, speed) above 13.4 m/s (30 mph) and maximum permissible •...

  • Page 32: Lifting Operations

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL the wind resistance area of load can be estimated as: • Is Awr less than Awr (load) (allow) 216 ft ≤ 149 ft ......NO = Ap x Cd = 180 x 1.2 = 216 ft (load) Conclusion: This load is NOT permissible to lift in wind...

  • Page 33: Counterweight

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Always keep the load as near to the equipment and as close Always use enough parts-of-line to accommodate the load to to the ground as possible. be lifted. Lifting with too few parts-of-line can result in failure of the hoist rope.

  • Page 34: Tilt-Up Panel Lifting

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL • Make sure that all signals are coordinated through the lift • The wire rope and sheaves shall be inspected prior to director or person in charge of the lift. and following the lifting operations for chaffing or scrubbing.

  • Page 35: Equipment

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS In addition to the operating requirements that are detailed in showing inspections were performed on the equipment the operating manuals and on the load capacity chart, pile during the time it was used for pile driving or extraction. driving and extracting operations are approved by National •...

  • Page 36: Set-Up And Operation

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL Example decal. For reference only. 8822 Equipment operation is dangerous when close to an The safest way to avoid electrocution is to stay away from energized electrical power source. Exercise extreme caution electrical power lines and electrical power sources. and prudent judgment.

  • Page 37: Electrocution Hazard Devices

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS 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 38: Special Operating Conditions And Equipment

    • If a thunder storm is forecast damaged parts are repaired or replaced as authorized by your National Crane distributor or Manitowoc Crane Care. Use electrically conducting material for grounding. Special Operating Conditions and Hammer a metal rod (3, Figure 2-5) (length of Equipment approximately 2.0 m (6.6 ft)) at least 1.5 m (5 ft) into the...
  • Page 39 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS section. Also see the optional equipment manual titled • The equipment operator must remain at the equipment Personnel Basket Manual which addresses safety, controls at all times when personnel are off the ground. inspection, testing, operation, installation, and lubrication. •...

  • Page 40: Environmental Protection

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL The following standards and regulations regarding personnel S h u t d o w n t h e e q u i p m e n t w h i l e m a k i n g r e pa i r s o r handling are available by mail at the following addresses: adjustments.

  • Page 41: Lubrication

    If any hydraulic fluid is injected into the skin, obtain medical attention immediately or gangrene may result. • Consult with Manitowoc Crane Care to determine if load testing is required after a structural repair is performed. • Do not attempt to repair or tighten any hydraulic hose or...

  • Page 42: Hoist Rope

    For detailed information concerning synthetic hoist rope, than two (2) broken wires at an end connection. refer to K100™ Synthetic Crane Hoist Line Manual P/N 9828100734 available by contacting Manitowoc Crane Care. • Core deterioration, usually observed as a rapid...

  • Page 43: Sheaves

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS ASME and similar organizations. See the Service • Operate the new rope—first through several cycles at Manual for inspection procedures. light load—then through several cycles at intermediate load, to allow the rope to adjust to operating conditions. When inspecting ropes and attachments, keep all parts of your body and clothing away from rotating hoist drums When using a wedge socket:...

  • Page 44: Batteries

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL TRANSPORTING THE EQUIPMENT upon the user’s experience and the demands of his application. Before transporting the equipment, check the suitability of Batteries the proposed route with regard to the equipment height, width, length, and weight. Battery electrolyte must not be allowed to contact the skin or Check load limits of bridges on the travel route and make eyes.

  • Page 45: Work Practices

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS WORK PRACTICES Follow the instructions in this manual when preparing the equipment for travel. Personal Considerations If using a boom dolly/trailer, thoroughly read and understand all the steps and safety precautions in this manual for setup Always adjust the seat and lock it in position, and fasten the and travel.

  • Page 46: Job Preparation

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL access steps, or walking/working surfaces could cause a Make sure that all persons are away from the equipment and slipping accident. A shoe that is not clean might slip off a the Travel Select Lever is in the “N” (Neutral) position with control pedal during operation.

  • Page 47: Lifting

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Make sure that the rope is properly routed on the hook block Make sure that the load is well secured and attached to the and boom nose and that all rope guards are in place. hook with rigging of proper size and in good condition.

  • Page 48: Hand Signals

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL Use tag lines (as appropriate) for positioning and restraining Do not remove right side boom nose pins unless the jib is loads. Check the load slings before lifting. properly pinned and secured on front and rear stowage brackets.
  • Page 49 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS 9580 FIGURE 2-6 NATIONAL CRANE 2-35 Published 09-04-2019 Control # 664-02...

  • Page 50: Parking And Securing

    SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL PARKING AND SECURING • Lock the operator’s cab (if applicable) and install vandal guards, if used. COLD WEATHER OPERATION WARNING Cold weather operation requires additional caution on the Tipping Hazard! part of the operator. When parking the equipment and leaving it unattended Check operating procedures in this manual for cold weather follow the instructions for the Controls and Operating...
  • Page 51 NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS 8]. A cylinder extended 1.5 m (5 ft) in which the oil cools cool. The load will lower as the telescope cylinder(s) retracts 15.5°C (60°F) would only retract approximately 38 mm (1 1/ allowing the boom to come in. Also, the boom angle will 2 in).

  • Page 52: Model Specific Information

    Manitowoc Crane Care immediately for overloads of These inspections apply only to overloads up to 50%. For 50% and higher. overloads of 50% or higher, equipment operation must be stopped immediately and Crane Care must be contacted for...

  • Page 53: Boom Inspection

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Boom Inspection 8836-2 9, 10 2, 3 9, 10 8836-1 Illustration for reference only. Your crane may be different. NATIONAL CRANE 2-39 Published 09-04-2019 Control # 664-02...
  • Page 54 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL NOTE: The following checklist includes all features that can be found on National Crane. Your crane may not have some features. Overload less than 25% Sheaves, Inspect all for damage. Rope Guides Collar-Wear Pads, Pad Inspect for damage.

  • Page 55: Superstructure Inspection

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Superstructure Inspection 9, 10 10,11 10,11 8836-1 Illustration for reference only. Your crane may be different. NATIONAL CRANE 2-41 Published 09-04-2019 Control # 664-02...
  • Page 56 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL NOTE: The following checklist includes all features that can be found on National Crane. Your crane may not have some features. Overload less than 25% Lift Cylinder Inspect for leaks. See topic in Introduction section Wire Rope Inspect all for damage.

  • Page 57: Carrier Inspection

    NBT50L SERIES OPERATOR MANUAL SAFETY PRECAUTIONS Carrier Inspection 8836-1 Illustration for reference only. Your crane may be different. NATIONAL CRANE 2-43 Published 09-04-2019 Control # 664-02...
  • Page 58 SAFETY PRECAUTIONS NBT50L SERIES OPERATOR MANUAL NOTE: The following checklist includes all features that can be found on National Crane. Your crane may not have some features. Overload less than 25% Stabilizer Inspect for leaks. Cylinders Outrigger Inspect for deformation and cracked welds. Pads Overload from 25% to 49% Stabilizer...

  • Page 59: Section 3

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES SECTION 3 CONTROLS AND OPERATING PROCEDURES SECTION CONTENTS General ........3-2 Diagnostic Connector—Crane USB-B Port .

  • Page 60: Jump Starting Hazard

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Hoist System Operation ....3-25 Shut Down and Preparation for Road Travel..3-27 Work Site Location .

  • Page 61: Getting Started

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES For example, if the crane operator moves the swing left • Ignition State = 1: truck key on joystick to rotate the machine, the “input” from the joystick is • Ignition State = 2: Lower control active. Used to run read by the control modules but the crane server module lower outrigger controls.

  • Page 62: Truck Cab Controls

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL TRUCK CAB CONTROLS Neutral Start/Safety Switch The truck cab controls described here are those controls that The truck must be equipped with a neutral/start safety switch are used in conjunction with the crane controls. on transmission.

  • Page 63: Cab Outrigger Control Panel

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES For more information about the cab outrigger controls, see outrigger functions can be controlled from the cab control “Cab Outrigger Control Panel” on page 3-5. For more panel. information about the ground station outrigger controls, see NOTE: The operator must be in the crane cab seat with left “Ground Station Outrigger Control Panels”...
  • Page 64 CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL 9594 7459-16 7448-1 Illustration for reference only. Your crane may be different. 9697 9593 FIGURE 3-1 Item Description Item Description Outrigger Midspan Selector Pin Outrigger Extend/Retract Cylinder Outrigger Beam Assy Long Console Panel Outrigger Beam Assy Short Emergency Stop Switch Level Indicator...

  • Page 65: Cab Outrigger Control

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES CAB OUTRIGGER CONTROL FRONT LEFT R I G H T SIDE SIDE 8232-5 REAR Item Description Outrigger Beam Selector Button Outrigger Jack Selector Button Extend Button Retract Button Single Front Outrigger (SFO) Button (if equipped) 9593 Enable Button...

  • Page 66: Outrigger Selector Valve

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Enable Button NOTE: The following details apply to both ground station control panels as indicated. The enable button is located on cab outrigger control panel The ground control outrigger beam selector buttons (Figure 3-2) and is used in conjunction with Pre-selection of (Figure 3-1 and Figure 3-3) are used to operate the front or outrigger selector switches control the outrigger functions.

  • Page 67: Ground Station Outrigger Control Panel

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES NOTE: To ensure a true reading always make sure the cab After pushing the desired selector button, pushing the extend tilt is completely lowered. or retract button energizes the control solenoid to allow hydraulic fluid to flow through the control solenoid valve and the individual solenoid valve and move the selected compo- Ground Station Outrigger Control Panel...
  • Page 68 CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL 9697 Item Description Outrigger Beam Selector Button Outrigger Jack Selector Button Extend Button Retract Button Single Front Outrigger (SFO) Button (if equipped) Enable Button Module Power Indicator Console Panel Emergency Stop Switch Level Indicator 9595 FIGURE 3-3...

  • Page 69: Crane Controls

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES CRANE CONTROLS 9598 9597 9596 9593 FIGURE 3-4 Item Description Item Description Outrigger Control Panel Display Diagnostic Connector Swing Brake Pedal Crane Level Indicator Boom Telescope Pedal (Optional) Truck Engine Hi/Low Switch Foot Throttle Pedal Crane Function Power Switch Display Panel Assembly...
  • Page 70 CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL 9600 9599 7459-22 7459-23 FIGURE 3-5 Item Description Item Description Horn Button Dual Axis Controller- Boom Lift/Main Hoist AC/Heater Climate Control Unit Dual Axis Controller- Swing/Tele/ Aux Hoist Single Axis Controller-Boom Lift Lever Seat Belt Single Axis Controller- Main Hoist Lever Seat Back Adjustment...

  • Page 71: Swing Brake Pedal

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES the back half of the switch (1, Figure 3-6) to unlock the swing brake. Item Description The back half of the switch (1, Figure 3-6) is designed with a Cab Tilt Switch locking mechanism to secure the swing brake in the locked House Lock position and prevent accidental movement of the cab and...

  • Page 72: Boom Telescope Pedal (Standard With Aux Hoist)

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL RCL Display Panel The display panel (5, Figure 3-4) is for the Rated Capacity Limiter (RCL). For more information, see “Rated Capacity Limiter” on page 7-1. The RCL assists the crane operator with the information for the crane to perform safely within its design parameters.

  • Page 73: Emergency Stop Switch

    RCL Override information before using the RCL override connect tool, and the appropriate software are required. on/off switch. For information concerning the operation and Contact Manitowoc Crane Care to obtain the appropriate maintenance of the RCL system, see Section 7 - Rated diagnostic cable.

  • Page 74: Diagnostic Connector-Crane Usb-B Port

    A laptop computer with a USB connector and the appropriate Skylight Wiper Switch electrical system software is required. Contact Manitowoc The skylight wiper switch (20, Figure 3-4) is located in the Crane Care to obtain the appropriate diagnostic cables.

  • Page 75: Single Axis Controller (Swing/Boom Tele)

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES Single Axis Controller (Swing/Boom Tele) Dual Axis Controller (Swing/Tele/Aux Hoist) (Optional) CAUTION CAUTION Do not actuate the Swing Control Lever while the Swing Brake is engaged, as the turret may push through the Do not actuate the Swing Control Lever while the Swing brake.

  • Page 76: Main Hoist Speed

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Main Hoist Speed The 3rd wrap indicator icon appears on the RCL display. For more information about the icon, see Table 7-3 on page 7-5. The main hoist speed selector switch (30, Figure 3-5) is located on the right seat armrest.

  • Page 77: Heater Cold Weather Fuel Mixture

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES Heater Coolant The heater coolant bottle (1, Figure 3-12) is mounted to the air conditioner. The coolant should contain a minimum 50/50 ratio mixture of water and antifreeze to prevent freezing or slushing.

  • Page 78: Operating Procedures

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Turn clockwise to open valve 9608 FIGURE 3-13 9607 OPERATING PROCEDURES by other means. When done, release the ladder using release handle (5) and lift and rotate to the stowed position. You need to be familiar with the safety precautions outlined Deploying the Cab Ladder in the section titled Safety Precautions, page 2-1 before operating the crane.
  • Page 79 NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES 9636 9610 9609 FIGURE 3-14 Ladder Insert Bushing (2 per location) Note: If optional step not installed Stowed Position Parts of crane not shown for clarity Possible Ladder Locations 9612 FIGURE 3-15 9611 Using the Movable Ladder to Access Decking The movable ladder (1) can also be used to access different...

  • Page 80: Accessing The Boom And Hoists

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Lift and remove the ladder pins (2, Figure 3-15) from the bushings in the deck. CAUTION Lift the ladder and install the ladder pins (2) in the Failure to stow and secure the movable ladder with linch bushings in the top of the rear bumper.

  • Page 81: Cold Weather Operation

    Lubrication section of your crane’s Operator Manual, by 6-3. contacting your local National Crane distributor, or by contacting Manitowoc Crane Care directly). • To see that the hydraulic hoses and fittings are in good condition and show no signs of leaking. The hoses...

  • Page 82: Hoist

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL • driving with an unloaded crane while not exceeding that all crane functions be cycled to remove cold fluid 1500 engine RPM and not exceeding half throttle. from all components and cylinders of the hydraulic system.

  • Page 83: Hoist System Operation

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES • Check that the display of the operating radius of the • Position the truck transmission to one of the following: crane agrees with the actual radius. Park available (common automatic Check the load display by lifting a load of known weight. The transmissions).

  • Page 84: Unattended Crane

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Put all operating controls in the neutral position. load chart. Overloading can create safety hazards, cause structural damage, and shorten the service life of the crane. Position the Crane Function switch to OFF. You must understand how to use the load charts located in the crane cab.

  • Page 85: Lifting The Load

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES • The load chart is used to determine the weight limit of Perform the lift. Use light variable movements of the the load based on the load radius and boom angle. All controls when moving the load to avoid sudden stops.
  • Page 86 CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Retract and place the boom in boom rest. 14. Turn off the ignition and all other switches in the crane cab. Engage the swing brake. 15. Close and/or secure all windows and doors. Engage the house lock.
  • Page 87 NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES FIGURE 3-19 NATIONAL CRANE 3-29 Published 09-04-2019 Control # 664-02...
  • Page 88 CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL FIGURE 3-20 3-30 Published 09-04-2019 Control # 664-02...

  • Page 89: Standard Remote Control

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES STANDARD REMOTE CONTROL When the standard Remote Control (1) is in the stowed position as shown in Figure 3-21 the remote control charging The crane is equipped with a standard hand held radio cable (3, Figure 3-21) should be plugged into the remote remote control.

  • Page 90: Operation

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL Operation Item Description Main Hoist Up Auxiliary Hoist Up Center Front Stabilizer Retract Blank Frequency Change Stop/Off The remote control (Figure 3-23) operates only when the crane is running and the “Crane Power” switch is turned OFF, the boom length is less than 10ft extended, and the boom angle is less than 10 degrees.

  • Page 91: Crane Remote Control (Optional)

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES CRANE REMOTE CONTROL (OPTIONAL) 7648 FIGURE 3-24 The optional Crane Remote Control (Figure 3-24) will allow Item Description full remote control of the crane. The standard Remote Main Hoist High Speed Control is disabled when using the optional Crane Remote Control.

  • Page 92: Activating The Crane Remote Control

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL The LCD Screen (27, Figure 3-24 and Figure 3-25) on the If any interference is present in the area and the remote does display is used to communicate signal strength, battery level, not function properly, the radio's channel can be changed.

  • Page 93: Camera System (Optional)

    NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES LCD SCREEN LAYOUTS Screen1 Screen 3 Screen 2 Actual Load Boom Length Load Radius Max Load Feedback Indicators Sample Screen Screen 5 Screen 6 Screen 4 Tip Height Reeving Boom Angle FIGURE 3-26 CAMERA SYSTEM (OPTIONAL) If equipped, the crane features two cameras: DANGER...

  • Page 94: Wind Speed Indicator (Optional)

    CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL In Operator Cab 9617 9619 FIGURE 3-27 9620 9618 WIND SPEED INDICATOR (OPTIONAL) The cranes feature an optional wind speed indicator to measure wind speed at the end of the boom. The wind speed indicator features a radio anemometer assembly and a wireless gateway router.
  • Page 95 NBT50L SERIES OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES Install the bushing (2) over the mast (3) and rod keeper (4). Align the bushing and keeper holes so the safety pin can be installed. Install the safety clip (1) in the bushing (2) and keeper holes (4).
  • Page 96 CONTROLS AND OPERATING PROCEDURES NBT50L SERIES OPERATOR MANUAL 9699 9700 FIGURE 3-30 In the cab, remove the safety pin (1, Figure 3-30) and Install the bushing (2) over the mast (4) and rod keeper bushing (2) from the anemometer stowage bracket (3). (5).

  • Page 97: Section 4

    NBT50L SERIES OPERATOR MANUAL SET-UP SECTION 4 SET-UP SECTION CONTENTS Outrigger Setup ......4-1 Possible Multi-Part Line Reeving Combinations.

  • Page 98: Bubble Level Adjustment

    SET-UP NBT50L SERIES OPERATOR MANUAL the crane, fully lowered to horizontal and fully retracted (for cranes fitted with a boom rest, the boom shall be stowed onto the rest). If necessary, relevel the crane using the procedures under Setting the Outriggers, page 4-2. Bubble Level Adjustment The bubble level adjustment should be checked periodically;...

  • Page 99: Jib Safety Information

    NBT50L SERIES OPERATOR MANUAL SET-UP NOTE: The RCL will automatically preselect the outrigger Operate with jib by boom angle when main boom is not position based on inputs from the four outrigger fully extended. Do not exceed rated jib capacities at any beam extension monitoring sensors.

  • Page 100: Erecting And Stowing The Jib

    SET-UP NBT50L SERIES OPERATOR MANUAL ERECTING AND STOWING THE JIB General Warnings DANGER To prevent serious injury or death, always wear personal protective equipment; i.e., a hard hat, eye protection, gloves, and metatarsal boots. DANGER Boom angles are used to control speed at which jibs swing during erecting and stowage.

  • Page 101: Jib Operation

    NBT50L SERIES OPERATOR MANUAL SET-UP JIB OPERATION Check that the jib is engaged on stowage brackets (front and rear) with the stow pin (1) installed and fully seated The NBT50L Series cranes can support the following jibs: before removing the swing pin (5) from the boom nose. •...

  • Page 102: Stowing Procedure

    SET-UP NBT50L SERIES OPERATOR MANUAL 19. Disconnect A2B/RCL cord (18) going to boom A2B extendable 2 section into the tele 1. Retraction of 2 switch and attach to quick coupler on jib A2B/RCL wire section may be facilitated by attaching loadline wedge (12, Figure 4-3) on rear of jib between the upper and socket to jib nose.

  • Page 103: Jib Removal

    NBT50L SERIES OPERATOR MANUAL SET-UP 18. Reinstall loadline over boom sheave case. CAUTION NOTE: When the jib is stowed on side of crane, always leave the ram and handle sleeve of the alignment Use caution when swinging the jib to avoid unnecessary jack pushed all the way in to reduce exposure to impact between the jib side plates or lacings and the hook rusting.
  • Page 104 SET-UP NBT50L SERIES OPERATOR MANUAL Retaining Pin Retaining Pin and Spring Clip 9627 9629 9626 Stowed Position 9628 for pin when jib is erected. Stow Pin Jib Stowage Bracket Hook Bracket Boom Jib Swing Pin Right Side Attachment Pins Left Side Attachment Pins Jib Retaining Pin Alignment Jack Jack Handle...
  • Page 105 NBT50L SERIES OPERATOR MANUAL SET-UP 9632 FIGURE 4-4 NATIONAL CRANE Published 09-04-2019 Control # 664-02...

  • Page 106: Jib Installation

    SET-UP NBT50L SERIES OPERATOR MANUAL JIB MAINTENANCE Item Description Lubricate as outlined in the section titled Lubrication Boom Base Section Procedure and Charts, page 5-1. Tele 1 Check for free rotation of jib sheave daily when using jib. Tele 2 Setting the Offset on the Telescopic Jib Tele 3 Jib Swing Pin...

  • Page 107: Setting The Offset On The Lattice Jib

    NBT50L SERIES OPERATOR MANUAL SET-UP d. Slowly elevate and telescope the boom at the same Use the following procedures to set the offset on the 36.5 ft time until the offset shaft takes the full load of the jib. lattice jib. To set the offset from thirty degrees (30°) to zero Setting Offset from 0°...
  • Page 108 SET-UP NBT50L SERIES OPERATOR MANUAL Setting Offset from 0° to 15° Install the offset pins (1, Figure 4-8), washers (2), and lock pins (3) in the 0° offset position. Secure with lock pin If not done, extend and set the outriggers. See “Setting spring clips.

  • Page 109: Setting The Offset Mast

    NBT50L SERIES OPERATOR MANUAL SET-UP Setting the Offset Mast Deploy the jib as outlined in (Jib Operation, page 4-5). Remove the pin (3) from the mast stowage bracket. The mast must be set for 0 degree and 30 degree for telescoping offset jib operation.

  • Page 110: Anti-Two-Block Weight Installation

    SET-UP NBT50L SERIES OPERATOR MANUAL Anti-Two-Block Weight Installation sheaves on the boom nose and the hook block. Install the clamp and nuts to the rope before To prevent the hoist rope from slipping out of the A2B weight, performing a lift. rig the weight as shown in Figure 4-10.
  • Page 111 NBT50L SERIES OPERATOR MANUAL SET-UP Table 4-1 Possible Multi-Part Line Reeving Combinations Line Parts Assembled View Reference Drawing Top Boom Nose Sheaves Top Boom Nose Sheaves Bottom Boom Bottom Boom Nose Sheaves Nose Sheaves 1-Part Line Reeving Overhaul Connect to Ball Overhaul Ball 9640...
  • Page 112 SET-UP NBT50L SERIES OPERATOR MANUAL Table 4-1 Possible Multi-Part Line Reeving Combinations (Continued) Line Parts Assembled View Reference Drawing Top Boom Nose Sheaves Top Boom Nose Sheaves Bottom Boom Nose Sheaves Bottom Boom Nose Sheaves 3-Part Line Reeving Connect to Hook Block Hook Block 1-Sheave...
  • Page 113 NBT50L SERIES OPERATOR MANUAL SET-UP Table 4-1 Possible Multi-Part Line Reeving Combinations (Continued) Line Parts Assembled View Reference Drawing Top Boom Nose Sheaves Top Boom Nose Sheaves Bottom Boom Bottom Boom Nose Sheaves Nose Sheaves 5-Part Line Reeving Connect to Hook Block 3-Sheave Hook Block...
  • Page 114 SET-UP NBT50L SERIES OPERATOR MANUAL Table 4-1 Possible Multi-Part Line Reeving Combinations (Continued) Line Parts Assembled View Reference Drawing Top Boom Nose Sheaves Top Boom Nose Sheaves Bottom Boom Bottom Boom Nose Sheaves Nose Sheaves 7-Part Line Reeving Connect to Hook Block 3-Sheave Hook Block...

  • Page 115: Lifting The Rated Load

    NBT50L SERIES OPERATOR MANUAL SET-UP Table 4-1 Possible Multi-Part Line Reeving Combinations (Continued) Line Parts Assembled View Reference Drawing Top Boom Nose Sheaves Top Boom Bottom Boom Nose Sheaves Nose Sheaves Bottom Boom Nose Sheaves Sheave Auxiliary Case 9-Part Line Reeving Sheave Case Hook Block Sheaves...

  • Page 116: Wedge Sockets

    SET-UP NBT50L SERIES OPERATOR MANUAL Install rope on the hoist drum in accordance with the Install the remainder of the rope, as applicable. following procedure: WEDGE SOCKETS Position the rope over the boom nose sheave and route to the hoist drum. To install a wedge socket: Position the hoist drum with the rope anchor slot on top.

  • Page 117: Wedge Socket Installation

    NBT50L SERIES OPERATOR MANUAL SET-UP Terminator Wedge Socket Torque Value Table Cable Size (inches) 7/16 9/16 1-1/8 1-1/4 Torque ft/lbs Torque values shown are based upon clean dry threads free of lubrication. FIGURE 4-12 Wedge Socket Installation Wedge Socket Inspect the wedge and socket. Remove any rough Live edges and burrs.
  • Page 118 SET-UP NBT50L SERIES OPERATOR MANUAL After final pin connections are made, increase the loads to cableways, cranes, derricks, hoists, hooks, jacks, and gradually until the wedge is properly seated. s li ng s. I t stat es , in s ec ti on 5 - 1 .7 .3, “ ( c) S w ag ge d, compressed, or wedge socket fittings shall be applied as The wire rope and wedge must be properly secured recommended by the rope, crane or fitting manufacturer.”...

  • Page 119: Removable Counterweights

    NBT50L SERIES OPERATOR MANUAL SET-UP REMOVABLE COUNTERWEIGHTS DANGER Ensure that all mounting pins are properly installed and locked during and after operating the counterweight removal system. C l e a r a l l p e r s o n n e l f r o m t h e c o u n t e r w e i g h t a n d superstructure area when mounting or removing the Counterweight counterweight(s).

  • Page 120: Mounting The Top Counterweight (Nbt50L/Ntc50L, Nbt55L/Ntc55L)

    SET-UP NBT50L SERIES OPERATOR MANUAL holes to not align with holes in counterweight. If this occurs, rotate the cylinder rod using your hand or counterweight pin. Raising the Counterweight Cylinders Press and hold a Power Button. Press and hold the left and right Counterweight Removal Cylinder Raise Buttons.

  • Page 121: Stowing The Top Counterweight (Nbt50L/Ntc50L)

    NBT50L SERIES OPERATOR MANUAL SET-UP counterweights. For more information, see House Lock, Attach the counterweight to cylinders using pins (5, page 3-13. Figure 4-20). The Counterweight Removal Slew Position Indicator 10. Using the counterweight switch panel, fully raise (yellow arrows) (1, Figure 4-19) appears in the RCL counterweight cylinders.

  • Page 122: Mounting The Bottom Counterweight (Nbt55L/Ntc55L)

    SET-UP NBT50L SERIES OPERATOR MANUAL Fully extend and set the outriggers, then level the crane information, see Lowering the Counterweight Cylinders, (see Setting the Outriggers, page 4-2). page 4-24. (Optional) Set the camera display to view the rear view 10. Secure the counterweight to the carrier deck with pins. camera as necessary.
  • Page 123 NBT50L SERIES OPERATOR MANUAL SET-UP display, which indicates the rear of the superstructure is If necessary, retract left and right pins (5, Figure 4-20) nearly directly above the counterweight stowage area on from the cylinder on the top counterweight. the carrier deck. Remove the left and right pins that secure the bottom Ensure vertical alignment of counterweight to the counterweight to the carrier deck.

  • Page 124: Stowing The Bottom Counterweight (Nbt55L)

    SET-UP NBT50L SERIES OPERATOR MANUAL Using counterweight control panel (Figure 4-16) located on either side of superstructure, lower the counterweight removal cylinders. For more information, see Lowering the Counterweight Cylinders, page 4-24. DANGER Ensure that all mounting pins are properly installed and 10.
  • Page 125 NBT50L SERIES OPERATOR MANUAL SET-UP in aligning the counterweights. For more information, see House Lock, page 3-13. The Counterweight Removal Slew Position Indicator (yellow arrows) (1, Figure 4-19) appears in the RCL display, which indicates the rear of the superstructure is nearly directly above the counterweight stowage area on the carrier deck.

  • Page 126: Stowing The 1500 Lb (680.4 Kg) Counterweight (Nbt50L) (Optional)

    SET-UP NBT50L SERIES OPERATOR MANUAL Using the counterweight control panel (Figure 4-16) counterweights are over the counterweight stowage located on either side of turntable, lower the area. Pull the House Lock handle on the console to counterweight removal cylinders. For more information, engage the house lock.

  • Page 127: General

    Specific recommendations of brand and grade of lubricants extreme condition lubrication, contact your local National are not made here due to regional availability, operating Crane Distributor or Manitowoc Crane Care. conditions, and the continual development of improved Environmental Protection products. Where questions arise, contact your National Crane Distributor or Manitowoc Crane Care.

  • Page 128: Chassis Grease

    NBT50L SERIES OPERATOR MANUAL Open Gear Lubricant suitability of a specific fluid, check with your authorized National Cranes distributor or Manitowoc Crane Care. This is a special high-graphite adhesive lubricant that helps NOTE: All fluids and lubricants may be purchased by...

  • Page 129: Arctic Hydraulic Oil

    Petroleum based fluids developed especially for low level and must meet John Deere Standard JDM J20C. temperature service may be used with satisfactory results. Contact your National Crane distributor or Manitowoc Crane However, certain fluids, such as halogenated hydrocarbons, Care if you have any questions.
  • Page 130 LUBRICATION PROCEDURE AND CHARTS NBT50L SERIES OPERATOR MANUAL National Crane Lube Specification Symbol Description Cold Weather Standard -40°C (-40°F) Antifreeze/Coolant (for Cab Heater) 6829101130 6829104212 EP-MPG Extreme Pressure Multipurpose Grease 6829003477 6829104275 GL-5 GL-5 Gear Lubricant 6829012964 6829014058 HYDO Hydraulic Oil 6829006444 6829006993 EP-OGL...
  • Page 131 NBT50L SERIES OPERATOR MANUAL LUBRICATION PROCEDURE AND CHARTS Lubrication Points (4 places) Telescoping 9669 Tilt Cab 9670 Lattice 9667 9671 9668 10a, 11, 12 7449-1 Illustrations for reference only. FIGURE 5-1 Your crane may be different. NATIONAL CRANE Published 09-04-2019 Control # 664-02...
  • Page 132 LUBRICATION PROCEDURE AND CHARTS NBT50L SERIES OPERATOR MANUAL Recommended Item Application Procedure Frequency Lubricant Check and Fill Weekly, Fill as required Hydraulic oil tank reservoir HYDO Change Semi-Annually After first 40 Hrs, Quarterly Hydraulic tank Oil filter Change or clean thereafter.

  • Page 133: Internal Cable Sheave Lubrication

    A 0.25 in (6.35 mm) diameter nozzle grease gun tip (National P/N 955045). Outrigger Beam Lubrication • Contact Manitowoc Crane Care to obtain this tip. Lubrication of the extend and retract sheaves is as follows: DANGER Locate the fittings as listed in the table above.

  • Page 134: Hoist Gearbox And Brake Oil

    -23° C to 66° C (-10° F to Drain the Gearbox and Brake Oil +150° F). For operation outside this range, contact Manitowoc Crane Care for recommendations. Remove the vent plug (2, Figure 5-3). Clean with solvent as needed. Set aside for later use.

  • Page 135: Swing Gearbox Oil

    NBT50L SERIES OPERATOR MANUAL LUBRICATION PROCEDURE AND CHARTS Fill the Gearbox and Brake Oil Rotate the hoist drum so the plug aligns with the oil fill access hole at the 3 o’clock position (4, Figure 5-3). Access hole Using a 5/16 inch (8 mm) Allen wrench, remove the Drain and fill plug drain and fill plug (Figure 5-4).

  • Page 136: Hydraulic Oil Reservoir Level

    LUBRICATION PROCEDURE AND CHARTS NBT50L SERIES OPERATOR MANUAL outside this range, contact Manitowoc Crane Care for If the oil level is too low, add the recommended hydraulic oil recommendations. until the oil level is even with the upper mark. If the oil level is high, drain oil until the oil level is even with the upper mark.

  • Page 137: Wire Rope Lubrication

    NBT50L SERIES OPERATOR MANUAL LUBRICATION PROCEDURE AND CHARTS WIRE ROPE LUBRICATION • not be soluble in the medium surrounding it under the actual operating conditions (example: Water). Wire rope is lubricated during manufacture and the lubricant • have a high film strength. applied does not last the life of the rope.

  • Page 138: Cleaning Procedures

    24 To help protect against corrosion of National cranes, hours after application. Manitowoc Crane Care recommends washing the crane at Once applied, treatment can appear to leave a slightly “oily” least monthly to remove all foreign matter. More frequent...

  • Page 139: Application

    Use of original paint colors is recommended necessary. to ensure the best color match possible. Please contact Manitowoc Crane Care should you have any For scratches and marks in areas of low visibility: questions. •...
  • Page 140 LUBRICATION PROCEDURE AND CHARTS NBT50L SERIES OPERATOR MANUAL 9883 Illustrations for reference only. Your crane may be different. 9734 FIGURE 5-8 5-14 Published 09-04-2019 Control # 664-02...
  • Page 141 NBT50L SERIES OPERATOR MANUAL LUBRICATION PROCEDURE AND CHARTS Item Description Item Description Counterweight Pins Downhaul Weight/Hook Block Tiedown Hoist Plumbing Connections Mirror Mounting Hardware Tension Spring Powertrain Hardware Pivot Shaft Outrigger Hose Connections Valve bank, Hose Connections inside turntable Outrigger Pins, Clips Wire Rope Entire underside of unit Boom Nose Pins, Clips...
  • Page 142 LUBRICATION PROCEDURE AND CHARTS NBT50L SERIES OPERATOR MANUAL THIS PAGE BLANK 5-16 Published 09-04-2019 Control # 664-02...

  • Page 143: Crane Inspection And Maintenance

    NBT50L SERIES OPERATOR MANUAL MAINTENANCE CHECKLIST SECTION 6 MAINTENANCE CHECKLIST SECTION CONTENTS Crane Inspection And Maintenance ... 6-1 Jib Jack Service and Maintenance ... . 6-6 Inspections .
  • Page 144 MAINTENANCE CHECKLIST NBT50L SERIES OPERATOR MANUAL Daily Inspections/Pre-use 26. Control and drive mechanisms for excessive wear and/ or contamination from lubricants, water or other foreign Check the following items: matter. Engine oil level. 27. All air, hydraulic, and working mechanisms before operating the PTO.

  • Page 145: Special Boom Inspection

    Drift from oil leaking by piston state and local regulatory agencies. d. Leaks at rod seals, welds, or holding valves. NOTE: Hoist rope may be purchased through Manitowoc Crane Care. PTO drive line system for proper alignment, lubrication, and tightness per PTO manufacturer’s specifications.

  • Page 146: Dynamic Shock Loads

    MAINTENANCE CHECKLIST NBT50L SERIES OPERATOR MANUAL chemicals or vapors or subjecting the rope to abrasive • Loss of rope diameter in a short rope length or material may shorten normal rope life. Frequent/periodic unevenness of outer strands indicates the rope needs to inspections and maintenance of rope is recommended for be replaced.

  • Page 147: Wire Rope Replacement

    NBT50L SERIES OPERATOR MANUAL MAINTENANCE CHECKLIST • Inspect rope in areas subjected to rapid deterioration • Wear of one-third the original diameter of outside such as: individual wires. Worn rope, usually indicated by flat spots on the outer wires is unsafe for further use when Sections in contact with saddles, equalizer sheaves, less than two-thirds the thickness of the outer wire or other sheaves where rope travel is limited.

  • Page 148: Replacement Rope

    If a cable replacement is required for the boom extension system, the replacement cable must be obtained through the Oil Cooler Manitowoc Crane Care. Extension cables are pre-stretched and have special connections for proper operation. The heat exchanger must be kept clean for efficient...

  • Page 149: Tire Load And Inflation Table

    NBT50L SERIES OPERATOR MANUAL MAINTENANCE CHECKLIST TIRE LOAD AND INFLATION TABLE NOTE: The values in the tables below are as published by the Tire and Rim Association 2005. Your vehicle Definite tire inflation pressures are established for each tire may be equipped with other tire sizes or the same size depending upon the load imposed on the tires.
  • Page 150 MAINTENANCE CHECKLIST NBT50L SERIES OPERATOR MANUAL Radial Ply Metric Tires for Trucks, Busses, and Trailers Used in Normal Highway Service Radial Ply Tires Mounted on 15° Drop Center Rims Tire and Rim Association Standard Radial Ply Metric Tires for Trucks, Busses, and Trailers Used in Normal Highway Service Radial Ply Tires Mounted on 15°...
  • Page 151 NBT50L SERIES OPERATOR MANUAL MAINTENANCE CHECKLIST Metric Wide Base Tires for Trucks, Busses, and Trailers Used in Normal Highway Service Tires Used as Singles Mounted on 15° Drop Center Rims Tire and Rim Association Standard Radial Ply Tires for Trucks, Busses, and Trailers Used in Normal Highway Service Radial Ply Tires Mounted on 15°...

  • Page 152: Specifications

    MAINTENANCE CHECKLIST NBT50L SERIES OPERATOR MANUAL SPECIFICATIONS Hydraulic Hydraulic Pump ..............286 l/min (75.5 gpm) 2200 rpm, Variable displacement, axial piston with load sense Pump Displacement ............130 cc/rev (7.93 in /rev) Pump Max Pressure............338 bar (4900 psi) Load Sense Relief Valve ..........332 bar ±3.45 (4663 psi ±50) Pump Load Sense Margin..........

  • Page 153: Swing Gearbox

    NBT50L SERIES OPERATOR MANUAL MAINTENANCE CHECKLIST Maximum Line Pull per Layer @ 310.2 bar (4500 psi) Layer Low Speed KG (lb) 7824 (17250) 7008 (15450) 6350 (14000) 5801 (12790) 5343 (11780) Swing Gearbox Output Torque................ 6779.1 N-m (60,000 in-lbs) Brake Release Pressure............12.1 bar (175 psi) Brake Torque (Static and dynamic)........

  • Page 154: Camera (Optional)

    MAINTENANCE CHECKLIST NBT50L SERIES OPERATOR MANUAL Alkaline Battery Life ............1 year for 40 hr/week or 6 months for continuous use Gateway Router (Crane Cab) Frequency (FCC) ............915 MHz Camera (Optional) Monitor (Crane Cab) Input Voltage ................. 12 volts to 60 volts (±10%) Size ..................
  • Page 155 Setting the Boom Angle Limit ....7-15 About the Manitowoc Diagnostic Code Mobile Setting the Tip Height Limit....7-15 Application .

  • Page 156: Rcl System Overview

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL FIGURE 7-1 9677 RCL SYSTEM OVERVIEW compares the actual conditions with the load chart. If an overload condition is sensed, audible and visual warnings The Rated Capacity Limiter (RCL) is an operational aid that are generated and the crane function controls that worsen warns the operator of an impending dangerous overload the overload condition (boom down, telescope out, and hoist...

  • Page 157: About The Rcl Display

    NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Main Menu RCL Setup Tools Diagnostics Return to Operating Mode Screen 8717-2 FIGURE 7-2 About the RCL Display Table 7-1 Main Menu Options The Main Menu screen displays when: Icon Description • The display first powers up, or RCL Set-Up —...
  • Page 158 “Diagnostics” on page 7-20. NOTE: On start up of the RCL, the Manitowoc splash The RCL display (Figure 7-2) shows available button screen and the National Crane logo screen functions based on the current screen and the current appears for a few seconds each before the Main system status.
  • Page 159 NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Table 7-3 RCL Screen Symbols (Continued) Table 7-3 RCL Screen Symbols Icon Description Icon Description RCL WADS Limit — The work area definition RCL Capacity Warning — Continuous visual (WADS) limit is measured as a straight line from and audible warning that an overload condition point A to point B anywhere in the work area.
  • Page 160 RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL Table 7-3 RCL Screen Symbols (Continued) Table 7-3 RCL Screen Symbols (Continued) Icon Description Icon Description Horn Silence — When highlighted blue, Hoist 1 (Main) Raise High Speed indicates the RCL warning horn is temporarily disabled for 15 seconds.

  • Page 161: About The Rcl And Atb Override Warnings

    NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER FIGURE 7-4 About the RCL and ATB Override Warnings Table 7-4 RCL and ATB Override Warnings Table 7-4 shows the RCL and ATB warning overrides that Icon Description appear on the RCL screen. The RCL override bypasses the RCL Override Warning (Red) —...

  • Page 162: Rcl Setup

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL RCL SETUP Step 2: Configuring the Boom If the crane is not configured with a jib, the following set up The RCL setup is where the lifting configuration of the crane screens will not appear. The system detects that no jib has is entered into the system.

  • Page 163: Step 3: Configuring The Counterweight(S)

    NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Screen 3-2 Screen 4-1a (NBT50L Series Only) 8807-11 9678 Selected 2 on Screen 2. Now select 1 or 2: is the jib retracted Selected 2 on Screen 3-2. Now select 1, 2, or 3: is the or extended? retracted jib straight (0°), midpoint offset (15°), or full offset (30°)?

  • Page 164: Step 4: Configuring The Outriggers

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL Step 4: Configuring the Outriggers 7521-10a Use one of the following procedures to configure the outriggers: • Outrigger Configuration Without Jib or Personnel Platform • Outrigger Configuration with a Personnel Platform • Outrigger Configuration with a Jib Outrigger Configuration Without Jib or Personnel Platform FIGURE 7-6...
  • Page 165 NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Extended range, the left-hand O/R graphic changes from appropriate left-hand O/R graphic changes from GRAY to GRAY to BLUE. BLUE. Screen 6-3 Screen 6-1 8807-18 8807-17 If the user attempts to select OK before Fully Extended, 75% If the user attempts to select OK before Fully Extended (NTC models only), or 50% Extended condition is met, the condition is met, the OK button is colored RED when...

  • Page 166: Step 6: Confirming The Configuration

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL Step 5: Configuring Hoist and Reeving Screen 9 Screen 7 8807-21 8807-23 OPERATING MODE Select 1 to show the Main Hoist enabled. Select 2 to show the auxiliary hoist enabled. After the RCL is setup is complete, the RCL Operating Mode screen is displayed.

  • Page 167: Accessing Operating Mode Screen

    NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Accessing Operating Mode Screen Overriding the RCL System Use this procedure to access the Operating Mode screen. The Operating Status key appears only after the DANGER RCL configuration and set-up is complete. The Operating Status icon configuration shows current approximate Use extreme caution when operating the crane with the percentage of load capacity.

  • Page 168: Setting The Slew Angle Limit

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL Setting the Slew Angle Limit Setting the WADS Limit Table 7-6 Operational Limits Selections Use the following procedure to set the Work Area Definition Icon Description Set (WADS).The WADS limits allow the operator to create virtual “walls”...

  • Page 169: Setting The Boom Angle Limit

    NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER RCL Limit #4 • Select DEL function key to remove the current XXXX-XX settings. • Select OK to store each position after input. • to return to previous screen with no inputs. Setting the Boom Angle Limit Use the following procedure to set the boom angle limit.

  • Page 170: Deleting All Limits

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL Deleting All Limits To access the Tools Menu: • Use the directional arrows to highlight the Tools icon. RCL Limit #6 Press the OK key. 8807-34 The Tools Menu appears. Tools Screen 8807-36 The RCL Limit #6 screen allows the operator to delete all limit values that exist.

  • Page 171: Setting Rcl Screen Brightness

    NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Accessing the Joystick Output Setup Screen Table 7-8 Hydraulic Filter Reminder Icons • Select the Joystick Output Setup icon to display Icon Description the Joystick Output Setup screen. Configure—Highlight and press OK to change the interval of the hydraulic filter Joystick Output Setup reminder.

  • Page 172: System Configuration

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL Joystick Output #2 Table 7-10 System Configuration Menu Icons Icon Description Software Update — Select this icon to load software updates. For more information, see the Service Manual. Crane Function Configuration — For more information, see the Service Manual.

  • Page 173: Setting System Date And Time

    NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER To enter the calibration password: In the System Configuration menu, select the Time Set Access the Sensor Calibration Menu. icon The Password screen appears. The Time Set screen appears. 9683 Enter the following. Use the directional arrow key, Do the following to update the field(s): highlight the number, then press to populate the...

  • Page 174: Component Addressing

    RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL COMPONENT ADDRESSING Table 7-12 Sensor Calibration Warnings Table 7-13 shows the component addressing warning icons. Icon Description These icons may appear after a component is replaced. For more information about component addressing, see the Slew Angle —...
  • Page 175 NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Table 7-15 describes the icons and data that populate the Table 7-15 Diagnostics Screen Icons (Continued) Diagnostics screen. Module Fault — Turns RED when any Table 7-15 Diagnostics Screen Icons CANbus is missing, including sensors and modules.

  • Page 176: Accessing The Diagnostics Menu

    “X” can be pressed. Tools Diagnostics Definitions of fault codes are available on the Manitowoc Diagnostics Code Mobile Application. Enter the fault code in the application to retrieve the definition. For more information, see “About the Manitowoc Diagnostic Code...

  • Page 177: About The Manitowoc Diagnostic Code Mobile Application

    Apple stores and compatible with most Android and Apple through the list of faults. mobile smart devices. To access the fault codes menu: To look up a fault code with the Manitowoc Diagnostic Code mobile application: Press the function key.
  • Page 178 Click NBT. diagnostics screen. For more information, see “About The NBT - Boomtrucks screen appears. Faults and Real-Time I/O Diagnostics” on page 7-22. Open the Manitowoc Diagnostics Code Application on your smart device. The Diagnostic Code Application splash screen appears.
  • Page 179 NBT50L SERIES OPERATOR MANUAL RATED CAPACITY LIMITER Click Continue. The Fault code information is displayed. 9616 Click OK to return to the main screen. NATIONAL CRANE 7-25 Published 09-04-2019 Control # 664-02...
  • Page 180 RATED CAPACITY LIMITER NBT50L SERIES OPERATOR MANUAL THIS PAGE BLANK 7-26 Published 09-04-2019 Control # 664-02...
  • Page 181 NBT50L SERIES OPERATOR MANUAL Alphabetical Index Accidents ............. 2-2 Cab Outrigger Control .
  • Page 182 OPERATOR MANUAL NBT50L SERIES Safety Messages ............2-1 Shut Down and Preparation for Road Travel .

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