Page 1 102BE-OM2009-00 Operation Manual Mini-Crawler Crane...
Page 2 Improper use of this machine can lead to serious injury. The operators and maintenance personnel must carefully read this manual and sufficiently understand its contents before operation / inspecting / maintaining the machine. Keep this manual at hand to read it over anytime.
Page 3: Table Of Contents
Rated Total Load Chart–4 Falls ................3-13 Rated Total Load Chart–2 Falls ................3-14 Rated Total Load Chart–Single Fall ................ 3-14 Rated Total Load Chart for Searcher Hook ............. 3-15 Rated Total Load Chart for Searcher Hook-SH1............. 3-16 9/2020 MC285CB-3...
Page 4 COLD WEATHER OPERATION ..................4-25 STARTING ......................... 4-26 Starting the Machine ....................4-26 WARM-UP ......................... 4-27 STOPPING ........................4-28 Normal Stopping ...................... 4-28 Emergency Stopping ....................4-28 TRAVELLING POSITION ....................4-29 TRAVELLING CONTROLS AND OPERATION ..............4-29 Directional Controls ....................4-31 9/2020 MC285CB-3...
Page 5 Boom Telescoping Operation .................. 4-65 Safety Precautions ....................4-65 Boom Telescoping Procedure ................4-66 Slewing Operation....................4-66 Safety Precautions ....................4-66 Slewing Procedure ....................4-67 Crane Stowing Operation ..................4-67 Safety Precautions ....................4-67 Stowing Procedure ....................4-68 9/2020 MC285CB-3...
Page 6 RADIO REMOTE CONTROL SYSTEM OPERATION ............ 4-107 Powering ON ......................4-108 Starting/Stopping the Machine ................4-108 Starting the Machine ..................4-108 Stopping the Machine ..................4-108 Operation after Machine Is Started ................ 4-108 Operation before Work..................4-108 Switching Operation Mode ................4-108 9/2020 MC285CB-3...
Page 7 HOISTING ........................4-129 Recommended Hoisting Attachments ..............4-129 Hoisting Procedure ....................4-129 MAINTENANCE AND INSPECTION Section 5 GENERAL MAINTENANCE INFORMATION AND PRECAUTIONS ........5-2 MACHINE BREAK-IN ......................5-5 LEGAL INSPECTION ......................5-6 CONSUMABLES ......................... 5-6 LUBRICATING OIL ......................5-7 9/2020 MC285CB-3...
Page 8 E-Boom, Frame and Hook .................. 5-56 Greasing ......................5-56 Searcher Hook Fix Bolts ..................5-56 Position Pin and Lynch Pin ................. 5-56 Pre-Start – After Starting Machine ................5-57 Moment Limiter for Operation (Searcher Hook Mode) ........5-57 9/2020 MC285CB-3...
Page 9 Mini-Crawler Crane M A E D A Table of Contents TROUBLESHOOTING....................... 5-58 Machine Body ......................5-58 Electrical Components ..................... 5-59 Battery ........................5-59 Electric Motor ......................5-60 Radio Remote Control System ................5-61 Error Codes ......................5-62 Slewing Position Calibration ..................5-63 9/2020 MC285CB-3...
Page 10 Table of Contents Mini-Crawler Crane M A E D A This Page Intentionally Left Blank viii 9/2020 MC285CB-3...
Page 11: Introduction
Section 1 INTRODUCTION 9/2020 MC285CB-3...
Page 12 Machine maintenance procedures may be retrieval systems - without the written permission updated by Maeda at any time. Always obtain the of Maeda Seisakusho Co., Ltd. latest information from Maeda or a Maeda sales ©...
Page 13 Section 2 SAFETY 9/2020 MC285CB-3...
Page 14: Safety Definitions
Section 2 – SAFETY DEFINITIONS Mini-Crawler Crane M A E D A SAFETY DEFINITIONS SAFETY PRECAUTIONS Maeda is concerned for your safety and the There is no substitute for common sense and condition of your mini-crawler crane. Safety careful practices. Improper practices or...
Page 15 Look at the level gauge when making adjustments during operation. Always keep the machine body level when operating. ・Sudden or jerky movement of the travel, crane or outrigger controls can cause the machine to tip over. Always operate these controls smoothly. 9/2020 MC285CB-3...
Page 16 ・Never hoist more than one load at a time. ・When you hoist a long load, such as pipes, clamp the load vertically or secure it at both ends. 9/2020 MC285CB-3...
Page 17 Any modification can affect the safe operation of the machine. Exposure Hazard Always wear personal protective equipment, including appropriate clothing, gloves, work shoes, and eye and hearing protection, as required by the task at hand. 9/2020 MC285CB-3...
Page 18 ・Never check for a hydraulic fluid or fuel leak with your hands. Always use a piece of wood or cardboard. Have your authorised Maeda dealer or distributor repair the damage. Flying Object Hazard Always wear eye protection when cleaning the machine with compressed air.
Page 19 ・Do not climb on the boom, outrigger or other machine surface. ・Where necessary, wear protective equipment and a safety harness. 9/2020 MC285CB-3...
Page 20 Retrieve any tools or parts that may have dropped inside of the machine to avoid improper machine operation. Never dispose of hazardous materials by dumping them into a sewer, on the ground, or into groundwater or waterways. 9/2020 MC285CB-3...
Page 21: Safety Label Locations
M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS SAFETY LABEL LOCATIONS Machine Body Fig. 2-1 9/2020 MC285CB-3...
Page 22 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A Fig. 2-2 2-10 9/2020 MC285CB-3...
Page 23 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [8] 102-3324500 [5] 102-4748700 (2 places) [9] 350-4539700 (4 places) [6] 102-4784300 [7] 553-4267400 (2 places) [10] 103-4592500 9/2020 MC285CB-3 2-11...
Page 24 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [15] 350-4432100 [16] 553-4268000 2-12 9/2020 MC285CB-3...
Page 25 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [17] 102-2223200 9/2020 MC285CB-3 2-13...
Page 26 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [20] 353-4488700 (3 places) [18] 349-4427100 [21] 893-4239100 [19] 102-4785100 [22] CL000200010 (2 places) 2-14 9/2020 MC285CB-3...
Page 27 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [26] 353-3235200 [23] 553-4267300 (2 places) [24] 102-4791800 [29] 349-4422000 [30] 553-4267500 (2 places) [25] 353-4488400 9/2020 MC285CB-3 2-15...
Page 28 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [32] 102-4792200 [39] 101-4593300 (4 places) [40] 553-4267700 (3 places) [33] 353-4488600 2-16 9/2020 MC285CB-3...
Page 29 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [42] 102-2223300 9/2020 MC285CB-3 2-17...
Page 30 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [45] 553-4267600 [48] 102-4619800 [50] 584-4581700 (2 places) [46] 349-4427200 [47] 103-4604800 2-18 9/2020 MC285CB-3...
Page 31 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [51] 102-3441100 [53] 102-4749400 [55] 102-4750600 9/2020 MC285CB-3 2-19...
Page 32 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [58] 102-4788200 [59] 102-4788400 [62] 102-4792300 (3 places) 2-20 9/2020 MC285CB-3...
Page 33: Searcher Hook (Option)
M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS Searcher Hook (Option) Fig. 2-3 9/2020 MC285CB-3 2-21...
Page 34 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [1] 102-4621200 (2 places) [5] 102-4608500 (2 places) [2] 102-3340000 [4] 102-4620300 (2 places) 2-22 9/2020 MC285CB-3...
Page 35 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [10] 102-2224000 9/2020 MC285CB-3 2-23...
Page 36 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A This Page Intentionally Left Blank 2-24 9/2020 MC285CB-3...
Page 37: Specifications, Terminology And Capacity Charts
Section 3 SPECIFICATIONS, TERMINOLOGY AND CAPACITY CHARTS 9/2020 MC285CB-3...
Page 38: Machine Features
Working envelope limited • Two-travel lever operation enables direction Working Status Lamp • changes forward, backward and right/left, and also pivot and spin turns. A battery is provided to allow operation without exhaust gas emissions. 9/2020 MC285CB-3...
Page 39: Crane Terminology
A vertical distance between the hook bottom and Working Radius the ground with the hook raised to the upper limit. A horizontal distance between the axis of slewing and the hook centre. Fig 3-5 Fig 3-2 9/2020 MC285CB-3...
Page 40: Principle Specifications List
Overall width of extended outriggers (Lateral) 4782 mm x (Front) 4718 mm x (Rear) 3990 mm Type Hydraulic motor driven, stepless speed changer, variable speed Travel speed Forward/backward: 0 – 2.0 km/h Travelling System Gradeability 20 degrees Ground pressure 51.0 kPa 9/2020 MC285CB-3...
Page 41 • Storage temperature: -20°C to 55°C • Operating humidity: Max. 85% RH (no condensation) • Atmosphere: Outdoor environment free from explosive, flammable and corrosive gases, moisture and excessive dust particles For details on storage, see “STORAGE” on page 5-52. 9/2020 MC285CB-3...
Page 42: Radio Remote Control System Specifications
Outrigger 2 GROUND/STOWAGE / Boom EXTEND/RETRACT Outrigger 1 GROUND/STOWAGE / Slew Transmitter power switch Micro speed switch Boom raising cancel switch Operation switch Horn switch Emergency stop (EMO)/Transmitter power OFF switch Rotary switch Operation mode selector switch Dial switch Display operation switch 9/2020 MC285CB-3...
Page 43: Searcher Hook Specifications
Stowed 3000 × 750 × 1470 mm length × width × height Crane capacity 850 kg Performance Maximum working radius 9.7 m Maximum lifting height above ground 8.9 m Only the searcher hook dedicated values are given here. 9/2020 MC285CB-3...
Page 44: Dimensional Drawings
Section 3 – DIMENSIONAL DRAWINGS Mini-Crawler Crane M A E D A DIMENSIONAL DRAWINGS Machine Dimensional Drawing Fig 3-6 Searcher Hook Dimensional Drawing Fig 3-7 9/2020 MC285CB-3...
Page 45: Outrigger Width Dimensional Drawing
M A E D A Mini-Crawler Crane Section 3 –DIMENSIONAL DRAWINGS Outrigger Width Dimensional Drawing Fig 3-8 9/2020 MC285CB-3...
Page 46: Rated Total Load Charts
Fig. 3-9 operation should proceed with respect to the values specified in the Rated Total Load Chart corresponding to “When the crane is used with the outriggers extended at the other than maximum.” 3-10 9/2020 MC285CB-3...
Page 47: Boom Length
3) 4.080-5.575 m Boom: With boom ② fully extended, and when boom ③ begins to extend, until boom ③ is extended until the first mark on boom ③ is visible at the end of boom ②. Fig. 3-12 9/2020 MC285CB-3 3-11...
Page 48 ②. Fig. 3-13 5) 7.080-8.575 m Boom: When boom ③ begins to extend past the second mark until booms ①+ ② + ③ + ④ + ⑤ are fully extended. Fig. 3-14 3-12 9/2020 MC285CB-3...
Page 49: Rated Total Load Chart For Standard Specification
53.5 1220 19.0 47.0 46.0 57.0 39.0 52.5 60.0 29.5 47.5 56.0 15.5 41.5 52.0 34.5 47.5 26.5 43.0 14.0 37.5 31.5 24.0 13.0 Hook block mass weight 30 kg standard supplied Maeda hook block or ball. 9/2020 MC285CB-3 3-13...
Page 50: Rated Total Load Chart-2 Falls
14.0 37.5 31.5 24.0 13.0 Hook block mass weight 30 kg standard supplied Maeda hook block or ball. Rated Total Load Chart–Single Fall Rated Total load Chart - 1 Parts of Line The unit of loads: kg 2.535 m Boom 2.536 –...
Page 51: Rated Total Load Chart For Searcher Hook
In SH2 position, do not operate above 75 is lifted. degree boom angle. Deductions from Searcher Hook Rated Total Load must be made for the weight of the searcher hook (22 kg), as well as block/ball and all rigging. 9/2020 MC285CB-3 3-15...
Page 52: Rated Total Load Chart For Searcher Hook-Sh1
10.0 48.5 more 50.0 or Prohibited 46.5 more 50.0 or Prohibited 37.0 more 35.5 25.0 46.5 41.0 31.5 47.5 21.0 42.0 37.0 48.5 36.0 47.5 29.0 43.0 19.5 38.0 Prohibited 34.0 32.5 26.5 Prohibited 17.5 8.95 8.95 3-16 9/2020 MC285CB-3...
Page 53: Rated Total Load Chart For Searcher Hook-Sh2
50.0 48.0 58.0 38.0 52.5 36.0 51.0 61.5 24.5 46.0 58.0 64.0 41.0 54.5 61.0 31.5 48.0 56.5 21.0 42.5 52.5 37.5 49.0 36.5 48.0 29.0 43.5 18.5 38.5 Prohibited 34.0 33.0 26.0 Prohibited 16.0 8.82 8.82 9/2020 MC285CB-3 3-17...
Page 54: Rated Total Load Chart For Searcher Hook-Sh3
47.5 60.0 36.0 54.0 34.0 53.0 62.0 17.5 47.5 58.0 64.0 11.0 41.5 54.0 61.0 30.0 48.0 56.5 11.5 42.0 52.5 41.0 51.5 35.5 48.0 27.0 43.0 13.0 38.0 Prohibited 33.0 32.0 24.0 Prohibited 10.0 8.61 8.61 3-18 9/2020 MC285CB-3...
Page 55: Working Radius/Lifting Height
The boom (4) represents a condition where half of the “ mark” passes boom (3). For more information, see "RATED TOTAL LOAD CHARTS" on page 3-10. Fig 3-18 9/2020 MC285CB-3 3-19...
Page 56 This is load radius. The rated total load decreases with increase in the working radius. Actual crane operation requires planning of work, allowing for sufficient clearance more than that provided in the diagram. Fig 3-20 3-20 9/2020 MC285CB-3...
Page 57: Working Radius/Lifting Height For Searcher Hook
• When using the searcher hook, be sure to set searcher hook mode for moment limiter. • When using the searcher hook, the searcher hook position must always be switched to suit the actual conditions. • Never use the searcher hook and the crane hook simultaneously. Fig 3-21-1 9/2020 MC285CB-3 3-21...
Page 58 Section 3 –WORKING RADIUS/LIFTING HEIGHT Mini-Crawler Crane M A E D A Fig 3-21-2 3-22 9/2020 MC285CB-3...
Page 59 M A E D A Mini-Crawler Crane Section 3 – WORKING RADIUS/LIFTING HEIGHT Fig.3-21-3 9/2020 MC285CB-3 3-23...
Page 60 Section 3 –WORKING RADIUS/LIFTING HEIGHT Mini-Crawler Crane M A E D A This Page Intentionally Left Blank 3-24 9/2020 MC285CB-3...
Page 61: Operation
Section 4 OPERATION 9/2020 MC285CB-3...
Page 62: Machine Components
7 - Post 20 - Carrier Roller 8 - Travel Control 21 - Travelling Motor and Sprocket 9 - Outrigger 22 - Monitor 10 - Outrigger Cylinder 11 - Machinery Cover 12 - Rubber Track 13 - Hook Hanger 9/2020 MC285CB-3...
Page 63 A device for stabilizing the vehicle body horizontally, composed of 4 units. For outrigger setup, see “OUTRIGGER SETTING” on page 4-43; for stowage see “OUTRIGGER STOWING” on page 4-53. Outrigger Cylinder A cylinder for extending the outrigger. Machinery Cover A left-right splitting machinery cover. 9/2020 MC285CB-3...
Page 64: Battery Components
Mini-Crawler Crane M A E D A BATTERY COMPONENTS Fig. 4-2 1 - Battery 5 - Charger 2 - Battery Charging Port 6 - Electric Motor 3 - Power Supply Cable 7 - Motor Controller 4 - Disconnect Switch 9/2020 MC285CB-3...
Page 65 Lights up when charging is in progress. • End Charge lamp (6) Lights up when charging is complete. Electric Motor A motor that converts electrical energy into mechanical energy. Motor Controller A controller for controlling the electric motor. 9/2020 MC285CB-3...
Page 66: Travel Controls
1 - Motor Speed Adjuster Dial 5 - Emergency Stop Switch (EMO) 2 - L. H. Travel Lever/Locking lever 6 - Horn Switch 3 - R. H. Travel Lever/Locking lever 7 - Working Light Switch 4 - Starter Switch 9/2020 MC285CB-3...
Page 67: Switches
1 2 B operations and crane/outrigger operations. • Travel: Pull up the lever while releasing the lock to allow travel operations. • Crane/Outrigger: Push in and stow the lever while releasing the lock to allow crane/outrigger operations. 9/2020 MC285CB-3...
Page 68: Emergency Stop Switch (Emo)
The Horn Switch is used to sound the horn. Fig. 4-11 NOTICE: • The horn sounds only for as long as the switch is pressed down. Release the switch to silence the horn. • The horn switch is provided on the crane operation side as well. 9/2020 MC285CB-3...
Page 69: Crane And Boom Controls
Section 4 – CRANE AND BOOM CONTROLS CRANE AND BOOM CONTROLS Control Location Fig. 4-13 1 - Slewing Lever 4 - Boom Lift Lever 2 - Boom Telescoping Lever 5 - Emergency Stop Switch (EMO) 6 - Horn Switch 3 - Winch Lever 9/2020 MC285CB-3...
Page 70: Controls
The switch returns to its original position, and the emergency stop state is reset. When restarting after an emergency stop, return all of the levers to their neutral positions, then return the emergency stop switch to the “OFF” position. 4-10 9/2020 MC285CB-3...
Page 71: Monitor
If operation lock password entry is activated then crane and outriggers cannot be operated. after the startup screen is displayed, the operation lock password screen will display. Next, a standby screen appears before switching to the home screen. Fig. 4-16 9/2020 MC285CB-3 4-11...
Page 72: 6 B W Arning Display
12 - Moment Limiter Status Display 5 - Motor Speed Adjuster Switch 13 - Warning Display 6 - Level Gauge 14 - Normal/Multi Mode Display 7 - Time Display 15 - Eco Mode Display 8 - Hour Meter Display 4-12 9/2020 MC285CB-3...
Page 73 “Home Screen” on page 4-12. Fig. 4-19 H ook Stowage/Boom Stowage Switch 2 0 B Used when stowing the hook or the boom Fig. 4-22 Press the switch to display the selection for hook stowage and boom stowage. Fig. 4-20 9/2020 MC285CB-3 4-13...
Page 74 Time Display Displays the time set. H our Meter Display 2 4 B Displays cumulative hours of operation. Fig. 4-23 Motor speed Icon 900 rpm 1300 rpm 1700 rpm 2100 rpm 2500 rpm 4-14 9/2020 MC285CB-3...
Page 75 Fig. 4-27 intermittently by an interval of 30 seconds when the charge is 20% or less. • The alarm buzzer emits a short beep intermittently by an interval of 30 seconds when the charge is 10% or less. 9/2020 MC285CB-3 4-15...
Page 76 Eco Mode Display Displays the eco mode status currently set. • STD: Standard mode • ECO1: Eco mode 1 • ECO2: Eco mode 2 For information on the eco mode settings, see "User Mode" on page 4-17. Fig. 4-29 4-16 9/2020 MC285CB-3...
Page 77 (2-3) Travel Alarm ON/OFF Selection (2-11) Warming Up ON/OFF Selection (2-4) Error History Display (2-12) Radio Remote Control System Accelerator (2-5) Consumables Display Switch (2-6) Monitor Brightness Adjustment (2-13) Home Switch (2-7) Time Setting (2-14) Display Page Change (2-8) Language Change 9/2020 MC285CB-3 4-17...
Page 78 • Eco Mode 2: This limits the maximum motor speed for all operations. The maximum motor speed is limited for all operations, so operating speed may be reduced. On the other hand, battery consumption is minimized. Fig. 4-32 4-18 9/2020 MC285CB-3...
Page 79 NOTICE: We recommend setting the consumable icon display selection (2-5C) to “Always.” Always: Consumable icons are constantly displayed on the Home screen if the replacement time is approaching or has been exceeded. 9/2020 MC285CB-3 4-19...
Page 80 Switches to the default language is completed. setting. Fig. 4-39 Fig. 4-42 24/12 Hour Display Change When the switch (2-7C) is pressed, time display can be changed to either 24 hour display or 12 hour display. Fig. 4-40 4-20 9/2020 MC285CB-3...
Page 81 Fig. 4-45 NOTICE: It is recommended that warming-up be turned on in cold conditions, as the machine and the hydraulic oil may take time to warm up. 9/2020 MC285CB-3 4-21...
Page 82 10 - Emergency Stop Reset Guide Display 11 - Emergency Stop Reset Switch If warning and/or error code is displayed, check the warning content and error content. If an error code is displayed, see “Error Codes” on page 5-62 and correct the problem. 4-22 9/2020 MC285CB-3...
Page 83 A warning is displayed if the slewing angle is Displayed when the machine is warming up. offset. If a warning appears, see “Slewing Position Calibration” on page 5-63 and calibrate the slewing angle. Fig. 4-52 Fig. 4-49 9/2020 MC285CB-3 4-23...
Page 84 To operate the levers on the machine while the guide is displayed, press the emergency stop reset switch at the bottom right of the monitor. Fig. 4-54 4-24 9/2020 MC285CB-3...
Page 85: Cold Weather Operation
20°C. Increase the hydraulic oil temperature by relieving the oil pressure. Allow the oil to flow to the hydraulic oil tank by using the operation lever. This will improve the machine hydraulic actions and prevent abnormal operation. 9/2020 MC285CB-3 4-25...
Page 86: Starting
Keep the key in your possession when the machine is not operating. CAUTION: Only use the starting procedure as described in this manual to start the machine. 4-26 9/2020 MC285CB-3...
Page 87: Warm-Up
If not, correct it as SETTING” on page 4-43. necessary. Loosen the wire rope which has been locking the hook block before disengaging the hook block from its hanger. See “Before Crane Operation” on page 4-61. Fig. 4-62 9/2020 MC285CB-3 4-27...
Page 88: Stopping
When restarting after an emergency stop, return all of the levers to their neutral positions, then return the emergency stop switch to the “OFF” position. 4-28 9/2020 MC285CB-3...
Page 89: Travelling Position
Do not allow a person to sit or stand on the travelling dolly or boom while moving the machine. Do not travel with a load placed on the travelling dolly or boom. 9/2020 MC285CB-3 4-29...
Page 90 • Soft or lose ground • Ground near cliffs • Roadsides • Deep gullies • Wet ground • Ground disturbed by dynamite or Fig. 4-71 earthquake • Filled holes • Uneven ground 4-30 9/2020 MC285CB-3...
Page 91: Directional Controls
Push the left and right travelling levers slowly at the same time to move forward. Fig. 4-75 Travelling in Reverse Pull the left and right travelling levers slowly at the same time to move in reverse. Fig. 4-76 9/2020 MC285CB-3 4-31...
Page 92 Only make spin turns at a safe, controlled speed. NOTICE: Stop the machine, then adjust the motor speed to low before performing spin turns. Operate the left and right levers in the opposite directions. 4-32 9/2020 MC285CB-3...
Page 93: Parking
NOTICE: Always set the travelling lever to the NEUTRAL position when parking the machine. Move the left and right travelling levers to the NEUTRAL position at the same time. This automatically brakes and stops the machine. Fig. 4-81 9/2020 MC285CB-3 4-33...
Page 94 Section 4 – PARKING Mini-Crawler Crane M A E D A Always park on solid, level ground. If you must park on a slope, place a chock in front of the tracks. Fig. 4-82 4-34 9/2020 MC285CB-3...
Page 95: Outrigger Safety Devices
• Check the level with the level gauge. (Working Status Lamp [red] flashes) When the machine tilts 3 degrees or more • Warning alarm buzzer sounds Crane inclination alarm device is during outrigger setting operation continuously activated. 9/2020 MC285CB-3 4-35...
Page 96 • Rotate (Stow) the outrigger and secure flash with position pin. (Working Status Lamp [red] flashes) • Stop the machine. When the machine tilts 3 degrees or more Crane inclination alarm device is Warning alarm buzzer sounds continuously during outrigger stowing operation activated. 4-36 9/2020 MC285CB-3...
Page 97: Outrigger Components
10 - Inner Box 3 - Rotary 4 - Rotary Positioning Pin 11 - Pad 5 - Outrigger Base Box 12 - Snap Pin 6 - Stay (of damper type) 13 - Snap Pin 7 - Outrigger Top Positioning Pin 9/2020 MC285CB-3 4-37...
Page 98: Outrigger Indicators
6 - Outrigger Angle Setting Light 2 3 - Outrigger Ground Set-Up Light 3 7 - Outrigger Angle Setting Light 3 4 - Outrigger Ground Set-Up Light 4 8 - Outrigger Angle Setting Light 4 9 - Boom Stowing Light 4-38 9/2020 MC285CB-3...
Page 99 The conditions of the outrigger pad are detected outrigger pivot. by the detection switch (1) at the bottom of the outrigger cylinder. There is a detection switch at the bottom of all four outrigger cylinders. Fig. 4-88 Fig. 4-86 9/2020 MC285CB-3 4-39...
Page 100 (1) on the travel undercarriage (fixed side). Fig. 4-90 Boom Fully Lowered Stowage Position The boom is determined to be stowed once it has stopped at the fully lowered stowage position. Boom movement is detected based on the boom angle. 4-40 9/2020 MC285CB-3...
Page 101: Outrigger Mode
(1-14) Outrigger Combined Ground Set-Up (1-6) Outrigger 3 Ground Set-Up Switch Switch (1-7) Outrigger 4 Stowage Switch (1-15) Outrigger Operation Lamp (1-8) Outrigger 4 Ground Set-Up Switch (1-16) Home Switch (1-9) Outrigger 1 and 4 Stowage Switch (1-17) Display Page Change 9/2020 MC285CB-3 4-41...
Page 102 O utrigger 1 and 4 / 2 and 3 Stowage 3 4 B Switches Allow front and rear outriggers to be stowed. • Front outrigger 1 and 4 simultaneous operation Fig. 4-98 • Rear outrigger 2 and 3 simultaneous operation 3 8 B Fig. 4-95 4-42 9/2020 MC285CB-3...
Page 103: Outrigger Setting
If the ground is not stable or the outriggers sink during operation, stop crane operations immediately. WARNING! Tip Hazard. Do not operate the machine if the outriggers are not set on stable ground. Set the outriggers on stable ground before operating the machine. Fig. 4-102 9/2020 MC285CB-3 4-43...
Page 104: Setting Outriggers (Normal Outrigger State)
Fig. 4-106 placed. Turn the rotary (3) so that the seal “Standard” affixed to its side and the seal “Standard” affixed to the side of frame are aligned. Fig. 4-107 4-44 9/2020 MC285CB-3...
Page 105 “Extended to maximum” at the pin of the same manner. coupled bracket, operate the machine in accordance with the rated total load for the "Other than MAX" outrigger position in “RATED TOTAL LOAD CHARTS” on page 3-13. Fig. 4-112 9/2020 MC285CB-3 4-45...
Page 106 3 degrees. Once the outriggers are in place, return to the Home screen on the monitor. Fig. 4-114 Check the outrigger number on the monitor against the actual outrigger number to determine the outrigger used. Fig. 4-115 4-46 9/2020 MC285CB-3...
Page 107: Setting Outriggers (Multi Outrigger State)
Multi outrigger automatically switches to “M: Multi Outrigger state. State” If “M: Multi Outrigger State” is flashing, the above outrigger angle state are not satisfied and the outriggers must be redeployed. Fig. 4-117 Fig. 4-120 Fig. 4-118 9/2020 MC285CB-3 4-47...
Page 108: Outrigger Setting Modes
See “OUTRIGGER SETTING” on page 4-43 for regardless of the load size. The machine proper setting of the outriggers. could become unsteady if a short working radius is not used and the motor is operating at a high speed. 4-48 9/2020 MC285CB-3...
Page 109: Other Than Max" Outrigger Position
Fig. 4-127 If one or more outriggers are retracted to other than maximum point, see the rated total load for the "Other than MAX" outrigger position in “RATED TOTAL LOAD CHARTS” on page 3-10 for correct capacities. 9/2020 MC285CB-3 4-49...
Page 110: Crane Operation Prohibited Zones Due To Outrigger Rotary Angle
(diagonally shaded zones in the illustration below) causes the machine to tip over, leading to serious personal injury. Never perform crane operation in the shaded zones below. Fig. 4-128 4-50 9/2020 MC285CB-3...
Page 111: Working Areas Based On Outrigger Posture
4. The boom will lower below 50° boom angle Total Load Capacities (RTL) are either within the 340°-20° portion of the slewing “MAX” or “OTHER THAN MAX” based on radius. the corresponding outriggers posture, extension position. Fig. 4-129 9/2020 MC285CB-3 4-51...
Page 112 110 to 340° 156 to 204° 204 to 340° 110 to 156° Multi Angle Multi Angle 110 to 250° 156 to 204° 204 to 250° 20 to 60° Multi Angle 20 to 250° 60 to 204° 204 to 250° 4-52 9/2020 MC285CB-3...
Page 113: Outrigger Stowing
Switch. When the outrigger cylinder has retracted completely and the outrigger has reached its upper limit, take your hand off the Outrigger Stowage Switch. Fig. 4-130 Select outrigger mode on the Home screen. Fig. 4-133 Turn off the machine. 9/2020 MC285CB-3 4-53...
Page 114: Procedures When Stopping The Machine
(7) of the linkage bracket 10. Stow the other three outriggers in the same (1), pull out the position pin. manner. 11. After stowing the outriggers, make sure that each position pin has been securely inserted and retained. Fig. 4-136 4-54 9/2020 MC285CB-3...
Page 115: Operation In Emergencies
Fig. 4-141 Turn on the Emergency Outrigger Fig. 4-144 Operation Selection switch inside the WARNING! Be sure to check the operation monitor case. lever corresponding to the number of the outrigger to be operated before operating the levers. 9/2020 MC285CB-3 4-55...
Page 116: Crane Safety Devices
Immediately repair any problems with the auto-stop feature before operating the • Outrigger stowing operation ⇒ crane. • Machine travelling operation Review, understand and follow the following operation sequences, warning alarms and stopping procedures when operating the machine. 4-56 9/2020 MC285CB-3...
Page 117: Interlock Characteristics
If any problems are found, Contact us or our sales service agency to contact us or our sales service agency. request inspection and repair service. 9/2020 MC285CB-3 4-57...
Page 118: Crane Operations
Boom Stowing Light (green) on the • Fully retract the boom If the Boom Stowing Light (green) does not monitor on • Boom horizontal stowing position turn on, all the outrigger operations stop. • Boom slew and stow position 4-58 9/2020 MC285CB-3...
Page 119: Crane Operation
Be involved. sure people do not enter the area inside working radius while the crane and boom are operating. Take into consideration that the working radius increases when a load is hoisted and the boom deflects. 9/2020 MC285CB-3 4-59...
Page 120 If caught by an obstacle, do not forcibly wind the hoisted load. Untangle the caught item before winding the load. 4-60 9/2020 MC285CB-3...
Page 121: Before Crane Operation
Switch on the Home screen on the monitor. NOTICE: The crane cannot be operated while in Outrigger mode. NOTICE: The crane cannot be operated unless the outriggers are correctly positioned. 9/2020 MC285CB-3 4-61...
Page 122: Crane Operation Position
Fig. 4-158 NOTICE: Release your hand from the dial once the motor speed has increased to that required for the task. The dial will remain at that position. Fig. 4-156 Fig. 4-157 4-62 9/2020 MC285CB-3...
Page 123: Monitor (Only During Crane/Outrigger Operation)
If unstable, lower the load to the ground and readjust the position of the hook to stabilise the load while hoisting. Be sure the load is stable before continuing to hoist the load. 9/2020 MC285CB-3 4-63...
Page 124: Hook Raising / Lowering Procedure
Keep the hook block wound up and away from people if it is not in use. WARNING! Tip Hazard. Never allow a hoisted load to contact an outrigger. Always use caution to prevent the hoisted load from contacting an outrigger. 4-64 9/2020 MC285CB-3...
Page 125: Boom Lifting Operation
WARNING! Unsafe Operation Hazard. Do not continue to hoist a load if the overwind alarm detector sounds. Stop the operation immediately and return all operation levers to the NEUTRAL position. 9/2020 MC285CB-3 4-65...
Page 126: Boom Telescoping Procedure
360-degree slewing. Fig. 4-165 WARNING! Tip Hazard. Never allow a load to contact an outrigger during a slewing operation. Always use caution to prevent the hoisted load from contacting an outrigger. 4-66 9/2020 MC285CB-3...
Page 127: Slewing Procedure
If the Boom Stowing Light does not turn on, lower the boom to the maximum or slew the boom to verify the Boom Stowing Light turns on. The Hook Stowage Switch cancels the auto-stop function of the over winding detector. 9/2020 MC285CB-3 4-67...
Page 128: Stowing Procedure
Check by adjusting the slewing angle position and • Pressing the switch will not stow the hook unless boom angle. the hook block is overwound. • Continue pressing the switch until the hook is fully stowed. Fig. 4-169 4-68 9/2020 MC285CB-3...
Page 129: Moment Limiter (Overload Detector)
• (B) Working Status Lamp (yellow) 12 - Moment Limiter Override Switch (Pre-warning Light for load factor of 90 to 13 – Alarm Buzzer 100%) • (C) Working Status Lamp (green) (Working Light for load factor of less than 90%) 9/2020 MC285CB-3 4-69...
Page 130: Programmable Moment Limiter
Hazard concerning the moment limiter: • Avoid direct sunlight. Do not allow the temperature of the moment limiter body to exceed the specified range. • Avoid locations with strong acids or alkaline. • Avoid impact to the moment limiter body. 4-70 9/2020 MC285CB-3...
Page 131: Moment Limiter Operation
“Actual load/Rated total load = 90 to 100%”. If the calculation result is “Actual load/Rated total load = 100% or more”, the moment limiter issues an alarm and at the same time automatically stops the boom operation. Fig. 4-175 9/2020 MC285CB-3 4-71...
Page 132 “peep”. usage conditions. • The hook lowering action is automatically stopped. When hook lowering action is automatically stopped, immediately recover from the stop. Raise the hook to correct the problem. Fig. 4-178 Fig. 4-176 4-72 9/2020 MC285CB-3...
Page 133 ･The battery is not being charged while the starter switch is turned off. If the working status lamp is subject to multiple states, illumination takes priority, as follows: Flashing red > Flashing yellow > Flashing green 9/2020 MC285CB-3 4-73...
Page 134: Prohibited Actions After Auto-Stop
Operating at any motor speed other than low may cause an unstable operating condition. With load factor of less than 90%: The Working Status Lamp flashes in green, indicating normal operation status. Fig. 4-180 4-74 9/2020 MC285CB-3...
Page 135 Do not use this switch to lift loads off the ground under normal conditions. Using this switch to lift loads off the ground may damage the machine or cause toppling or other serious accidents. Fig. 4-185 9/2020 MC285CB-3 4-75...
Page 136: Moment Limiter Display
22 - Clockwise (Right) Slewing Angle Limit Switch 11 - Over Winding Display 23 - Counterclockwise (Left) Slewing Angle Limit Switch 12 - Over-Unwinding Stop Display 24 - Lever detection display 25 - Slew origin detection display 4-76 9/2020 MC285CB-3...
Page 137 • When the crane stops, the numerical value of actual load display changes if there is slewing of Fig. 4-191 load. 9/2020 MC285CB-3 4-77...
Page 138 The working radius refers to the horizontal Number of Falls Display distance from the centre of slewing of the crane to Displays the current number of falls when the the centre of the hook. crane is being operated. Fig. 4-193 Fig. 4-196 4-78 9/2020 MC285CB-3...
Page 139 • You can check the operating range limit Fig. 4-198 currently set. Pressing the switch displays the setting for approximately 5 seconds. • You can clear all operating range limit settings. Hold down the switch to clear all settings. Fig. 4-200 9/2020 MC285CB-3 4-79...
Page 140: Over Winding Detector
When an alarm buzzer sounds, move the winch lever immediately to LOWER or move the boom telescoping level to RETRACT to lower the hook block. For more information on control during stoppage caused by over winding, see “Over Winding Detector” on page 4-72. 4-80 9/2020 MC285CB-3...
Page 141: Moment Limiter Working Envelope Setting
“OFF” position. Cancel Press and hold the switch in a condition in which the upper limit value is set. The monitor display changes to the blue colour and the upper limit value setting is cancelled. 9/2020 MC285CB-3 4-81...
Page 142: Setting Or Cancelling The Boom Angle Upper Limit Value/Lower Limit Value
Cancel Press and hold the switch in a condition in which the upper limit value is set. The monitor display changes to the blue colour and the upper limit value or lower limit value setting is cancelled. 4-82 9/2020 MC285CB-3...
Page 143: Setting/Resetting Slewing Angle Limits
Each time the switch is pressed, the selection changes. Select the yellow indicator for the direction to be cleared, and hold down the switch. The monitor display changes to blue, indicating that the slewing angle limit setting has been cleared. 9/2020 MC285CB-3 4-83...
Page 144: Battery Handling
Otherwise there is a down the machine. Restart the machine as risk of damage due to fluid leakage, normal, and the Moment Limiter system will overheating, rupture, or fire. commence with normal start up sequence. 4-84 9/2020 MC285CB-3...
Page 145 • Cold or hot locations at temperatures medical attention. outside the operating temperature range of -20°C to 40°C • Locations where the humidity exceeds 85%RH • Locations where condensation may occur due to sudden temperature fluctuations 9/2020 MC285CB-3 4-85...
Page 146: Action When The Battery Is Drained
Be sure to turn the starter switch to “OFF” when the machine is stopped for extended periods. • Take care when using the battery at elevations above 1,000 m, as its cooling performance will be reduced. 4-86 9/2020 MC285CB-3...
Page 147: Battery Charging
Press the switch to switch to user mode. charged. For more information on user mode, see “User ON: The working status lamp flashes. Mode” on page 4-17. OFF: The working status lamp stays off. Fig. 4-211 9/2020 MC285CB-3 4-87...
Page 148: Charging Method
When unplugging, always unplug by holding the plug and not by pulling the cable. Fig. 4-213 Fig. 4-215 Unplug the power supply cable from the charging port, then close the cover on the charging port. 4-88 9/2020 MC285CB-3...
Page 149: Radio Remote Control System Introduction
Fig. 4-217 Holding Wear the waist belt, and operate the control levers and buttons with your thumb. Firmly grasp the grip with other fingers and hold the transmitter. Fig. 4-218 Always manipulate levers and switches with your fingers. 9/2020 MC285CB-3 4-89...
Page 150 WARNING! Electrical Shock Hazard. Do not use the transmitter if its case is damaged. Do not drop the transmitter or allow the case to become damaged. A damaged case may cause internal component damage and/or electrical failure. Fig. 4-222 4-90 9/2020 MC285CB-3...
Page 151 • Direct sunlight Do not disassemble or modify the battery. Doing • Near warm air outlets of vehicles so may cause electrolyte leakage, heat • Near heating system generation and rupture of the battery. • High humidity 9/2020 MC285CB-3 4-91...
Page 152: Operation Precautions
When performing welding repairs to the crane, weld in a location with good facility, and, only authorised personnel are permitted to weld. • Disconnect the electric wiring connection section with the receiver. Otherwise, the electric system of the receiver will be destroyed. 4-92 9/2020 MC285CB-3...
Page 153 • In emergencies or if even a minor problem arises within the machine operating area, press the Emergency Stop Switch (EMO) immediately to shut down the transmitter. 9/2020 MC285CB-3 4-93...
Page 154: Radio Remote Control System Features
“forced zero position” function is activated to return to the state in which no operation lever is pressed, to avoid Fig. 4-231 miss-operation or erroneous activation. • This radio remote control system detects an unused frequency automatically. 4-94 9/2020 MC285CB-3...
Page 155: Radio Remote Control System Components
L1 - LED Light (Front) 7 - Emergency Stop (EMO)/Transmitter Power L2 - LED Light (Control Panel) OFF Switch M1 - Left Display 8 - Cable Connection Port (Not used) M2 - Right Display 9 - No. 1 Outrigger/Slewing Operation Lever 9/2020 MC285CB-3 4-95...
Page 156 The horn keeps blowing while this switch is pressed. Boom Lift Bypass Switch Fig. 4-238 The boom can be lifted while this switch is pressed following an overload stop. Micro Speed Switch Used to operate the crane at slow speed when operating the crane. 4-96 9/2020 MC285CB-3...
Page 157 “Crane Operation” on page 4-112. Operation Mode Selector Switch Used to switch between Outrigger mode and Crane mode. Fig. 4-240 • Outrigger: Allows outriggers to be operated using levers. • Crane: Allows the crane to be operated using levers. 9/2020 MC285CB-3 4-97...
Page 158: Transmitter Display Components
Section 4 – RADIO REMOTE CONTROL SYSTEM COMPONENTS Mini-Crawler Crane M A E D A Transmitter Display Components Fig. 4-241 4-98 9/2020 MC285CB-3...
Page 159 (2) LED light (operation panel) ON/OFF ・RTL: Indicates the rated total load. (3) Move to the crane/outrigger screen ・AL: Indicates the actual load. (4) Move to radio remote control menu 9/2020 MC285CB-3 4-99...
Page 160 Section 4 – RADIO REMOTE CONTROL SYSTEM COMPONENTS Mini-Crawler Crane M A E D A [Radio Remote control menu list] Fig. 4-245 4-100 9/2020 MC285CB-3...
Page 161: Status Indications Of Display
Indicates the remaining battery levels as follows: Fig. 4-248 Error Icon An icon appears when an error is detected. Detailed information about the error icons can be checked from the radio remote control menu in the configuration menu. Fig. 4-247 9/2020 MC285CB-3 4-101...
Page 162: Receiver Components
Receiver Components Fig. 4-249 R1 - Control Box R3 - Connector Connection Port R2 - Monitor LED R4 - Antenna Control Box The control box contains the receiver and control devices. Do not dismantle the control box. 4-102 9/2020 MC285CB-3...
Page 163 Failure to do so may result in a machine failure caused by burn damage to the control box due to high voltage applied to it. 9/2020 MC285CB-3 4-103...
Page 164: Radio Remote Control System Verifications
Damage to these items may cause internal component damage and/or electrical failure. 4-104 9/2020 MC285CB-3...
Page 165 Fig. 4-254 • Ground Set-Up: The outriggers are lowered to the ground. • Stowage: The outriggers are lifted from the ground. 9/2020 MC285CB-3 4-105...
Page 166 Move the operation lever (12) to “Raise” and “Lower” side and check that the boom follows the lever operation. Fig. 4-256 Fig. 4-259 4-106 9/2020 MC285CB-3...
Page 167: Radio Remote Control System Operation
• In crane operation, when the transmitter has not been operated for a certain period of time after the last operation, it will be automatically turned “OFF”. When using the transmitter again, first turn on the transmitter power. 9/2020 MC285CB-3 4-107...
Page 168: Powering On
Transmitter Power Switch once again with power to the radio remote control system turned on. CAUTION: You must press the Transmitter Power Switch a total of three times to enable Fig. 4-265 crane operations using the radio remote control system. 4-108 9/2020 MC285CB-3...
Page 169: Outrigger Operation
WARNING! Tip Hazard. Do not operate the machine if the outriggers are not properly positioned. The outriggers must be properly positioned for proper operation of the machine. 9/2020 MC285CB-3 4-109...
Page 170: Outrigger Setting
Switch the operation mode selector switch to Once the machine has been lifted “Outrigger.” approximately 80 mm above the ground, check the position of the bubble in the monitor level gauge to level the machine body. Fig. 4-271 4-110 9/2020 MC285CB-3...
Page 171: Outrigger Stowage
Operations Performed with Machine Shut Down Stow the outriggers referring to “Procedures When Stopping the Machine” on page 4-54. Fig. 4-276 NOTICE: If the travel lever is not pushed in, the interlock engages, preventing outrigger operation. 9/2020 MC285CB-3 4-111...
Page 172: Crane Operation
Leaving the switch in Outrigger mode is • Hoisting: Pull the lever toward you. extremely dangerous, as the outriggers may NOTICE: Adjust the raising and lowering speed of operate unexpectedly. the winch by moving the lever forward or backward. 4-112 9/2020 MC285CB-3...
Page 173: Boom Lifting/Lowering Operation
NOTICE: Adjust the raising and lowering speed of • Retracting: Pull the lever toward you. the boom by moving the lever forward or backward. Fig. 4-282 NOTICE: Adjust the boom extension and retraction speed by moving the lever forward or backward. 9/2020 MC285CB-3 4-113...
Page 174: Slewing Operation
Fig. 4-283 • The Emergency Stop Switch (EMO) can also be used for turning OFF the power to the NOTICE: Adjust the crane slew speed by moving transmitter. the lever forward or backward. 4-114 9/2020 MC285CB-3...
Page 175: Horn Switch Operation
Serious accidents such as machine damage or toppling may occur if you use this switch to lift loads off the ground. Fig. 4-287 Horn Switch Operation The horn keeps blowing while this switch is pressed and held. Fig. 4-288 9/2020 MC285CB-3 4-115...
Page 176: Led Light Operations
Press the Emergency Stop (EMO)/ Transmitter Power OFF Switch to turn off power. Fig. 4-292 Fig. 4-293 Turn the Starter Switch on the machine main unit to “OFF” to turn off power. 4-116 9/2020 MC285CB-3...
Page 177: Inspection After Ending Remote Control System Operation
Turn OFF the power of the transmitter. Pressing the Emergency Stop (EMO)/ Transmitter Power OFF Switch will turn OFF the power. Fig. 4-295 2. Lift the battery upward while pushing it. The battery comes off. Fig. 4-296 9/2020 MC285CB-3 4-117...
Page 178: Charging Method Of Battery
• Keep the battery at room temperature. • Use the supplied protective cap to store the battery. Never short out the battery. 4-118 9/2020 MC285CB-3...
Page 179 Connect the battery charger (B1) to the cord (B3), and insert the cord plug into the power outlet. The battery status LED indicator (B4) on the charger starts blinking to indicate the charging has started. Fig. 4-300 9/2020 MC285CB-3 4-119...
Page 180: Searcher Hook Safety Precautions
Searcher hook position settings Actual machine position Selector switch Position display Stowing 4-120 9/2020 MC285CB-3...
Page 181: Searcher Hook Components (Option)
9 - Nut (M12× grade 1, strength 10) 4 - Position pin 10 - High tension washer (M12×26×3.2t) 5 - Lynch pin 11 - Shackle 6 - pin 12 - Hook 7 - Hexagonal bolt with washer 9/2020 MC285CB-3 4-121...
Page 182: Searcher Hook Monitor
Fig.4-303 Searcher Hook Position Display The display will change depending on the Fig.4-304 searcher hook position setting. For more information on the position and display details, see “Moment Limiter Settings” on page 4-120. 4-122 9/2020 MC285CB-3...
Page 183: User Mode
“User Mode” on page 4-17. Hook Hanging Number Selection/Searcher Hook Position Selection Used when switching the searcher hook position setting For more information on the actual position and position switching, see “Moment Limiter Settings” on page 4-120. Fig.4-306 9/2020 MC285CB-3 4-123...
Page 184: Searcher Hook Operation
If the position pin falls out searcher hook mounting plate bolts to the during operations, serious injury or damage designated tightening torque. to the machine may result. To install searcher hook, always use new genuine Maeda bolts, nuts, and washers. 4-124 9/2020 MC285CB-3...
Page 185 Do not exceed a boom angle of 50° when the E such as machine damage may result because boom position is SH1 or a boom angle of 75° the moment limiter will not operate correctly. when the E boom position is SH2. Fig.4-317 Fig.4-314 9/2020 MC285CB-3 4-125...
Page 186 If it becomes necessary to raise the boom while automatically stopped, the boom Fig.4-320 can be raised only while the Boom Lift Bypass Switch is depressed. 4-126 9/2020 MC285CB-3...
Page 187: Trailering
4-28. During travelling position setup, securely insert the four position pins to the outrigger pivot base before loading or unloading the machine. • Take road width, height and weight into consideration when determining a transportation route. 9/2020 MC285CB-3 4-127...
Page 188: Ramp Planks
Place wheel blocks under the wheels of the trailer to secure the trailer. Fig. 4-323 Fig. 4-321 Secure the ramp planks to the trailer and align the machine with the ramp planks and trailer. Verify the two ramp planks are at the same height. 4-128 9/2020 MC285CB-3...
Page 189: Hoisting
Recommended Hoisting cylinder (3), or there is no play at the hook Attachments hanger (4). • Equipment with an operating capacity sufficient for the total weight of the machine 9/2020 MC285CB-3 4-129...
Page 190 Section 4 – HOISTING Mini-Crawler Crane M A E D A This Page Intentionally Left Blank 4-130 9/2020 MC285CB-3...
Page 191: Maintenance And Inspection
Section 5 MAINTENANCE AND INSPECTION 9/2020 MC285CB-3...
Page 192: General Maintenance Information And Precautions
NOTICE: Check hour meters daily for maintenance items that have reached the obligatory maintenance period. Parts Always use Maeda genuine parts as specified in the parts catalogue. Cleaning Parts Clean parts with a noncombustible cleaning agent. Be sure to clean mating surfaces after removing a part to which an O-ring or gasket is attached.
Page 193 Exercise caution when handling loud noises to prevent hearing loss. electrical parts. • Always wear the appropriate gloves to Only Maeda-approved optional electrical parts protect your hands, especially when may be installed. handling extremely hot or cold equipment Handling and Service of Gearcase and fluids.
Page 194 • Unpack a replacement hydraulic oil filter seek medical attention immediately. Any fluid immediately before use. injected under the skin must be removed • Always use Maeda genuine hydraulic oil filters. surgically or gangrene may result. WARNING! The following safety messages address a potential Burn Hazard: •...
Page 195: Machine Break-In
Raise the rubber tracks a minimum of 80 mm appropriate maintenance. off the ground. Place square blocks underneath the tracks at both the front and back of machine. Use the outriggers and slowly lower the tracks until they rest firmly on the blocks. Fig. 5-1 9/2020 MC285CB-3...
Page 196: Legal Inspection
Check the winch wire rope end and wire clip efficiency. for damage. Replace the wire rope immediately if Always use Maeda genuine parts for part damaged. replacement. See the Maeda genuine parts book Check the hydraulic hoses for oil leaks and for part numbers when ordering parts.
Page 197: Lubricating Oil
Section 5 – LUBRICATING OIL LUBRICATING OIL Lubricating oil usage varies with ambient temperature changes. The machine is shipped with ISO VG32 hydraulic oil. When replenishing with oil of a different grade, be sure to replace all of the oil. Fig. 5-2 9/2020 MC285CB-3...
Page 198: Special Tools And Standard Tightening Torque
37.5 3.85 32.6-43.1 3.35-4.43 65.5 6.70 57.0-75.3 5.85-7.70 10.6 90.4-120 9.2-12.2 16.6 142-187 14.4-19.1 22.8 195-258 19.8-26.2 32.4 277-366 28.2-37.3 44.0 376-497 38.3-50.6 56.0 477-631 48.7-64.4 81.9 699-925 71.2-94.2 1090 948-1250 96.5-128 1485 1290-1710 131-174 1910 1660-2200 167-223 9/2020 MC285CB-3...
Page 199 2.72-3.70 62.5 6.40 53.1-71.9 5.44-7.35 11.1 92.7-125 9.44-12.8 17.7 148-200 15.0-20.4 27.7 230-312 23.5-31.9 38.1 317-429 32.4-43.8 54.0 450-608 45.9-62.1 73.4 612-828 62.4-84.4 93.3 778-1050 79.3-107 1340 1140-1540 116-156 1820 1550-2090 157-213 2470 2100-2840 214-290 3180 2700-3660 275-373 9/2020 MC285CB-3...
Page 200: Hose Connector Tightening Torque
Determine the appropriate tightening torque based on the hose connector width across flats (a). Fig. 5-4 Width Across Target value Tolerance Hose No. Flat (Mark “a”) N▪m kgf▪m N▪m kgf▪m 35-54 3.5-5.5 54-93 5.5-9.5 59-98 6.0-10.0 10.5 84-132 8.5-13.5 16.0 128-186 13.0-19.0 22.0 177-245 18.0-25.0 5-10 9/2020 MC285CB-3...
Page 201: Machinery Cover
“Removing Machinery Cover” on page 5-11. Upon completion, always check each part for interference. Fig. 5-5 NOTICE: The mounting bolts (2) are positioned with 3 at the top, 3 at the rear and 1 at the front left lower side. 9/2020 MC285CB-3 5-11...
Page 202: Fuses
15 A Starter switch 15 A Spare 15 A Monitor / Main controller / Sub controller / Motor controller / BMU power supply 15 A Spare 10 A Motor controller / BMU power supply 10 A Spare 5-12 9/2020 MC285CB-3...
Page 203: Inspection
See “Wire Rope - Boom Telescope Extension” on page 5-46. Check Air Breather See “Air Breather Inspection” on page 5-49. Drain Water and Sediment Inside Hydraulic Oil Tank See “Drain Water and Sediment Inside Hydraulic Oil Tank” on page 5-51. 9/2020 MC285CB-3 5-13...
Page 204: Pre-Start Visible Checks
(12) Winch Motor - See “Winch Motor” on page 5-15. (13) Winch Drum - See “Winch Drum” on page 5-15. (14) Hook Block - See “Hook Block” on page 5-15. (15) Operation Levers - See “Operation Levers” on page 5-15. 5-14 9/2020 MC285CB-3...
Page 205 Check for cracks, bent or damage sections in all areas, and check wear of support pins etc., and repair as necessary. Check for loose mounting bolts of the support pin lock plate portion and tighten it as necessary. 9/2020 MC285CB-3 5-15...
Page 206: Pre-Start Inspection
Check the oil level gauge (G) in the left side of the machinery cover and ensure that oil is sufficient to reach the level point (red point). Fig. 5-9 Fig. 5-10 5-16 9/2020 MC285CB-3...
Page 207 If the oil level is low, refill with the gear oil from the plug hole of the filler plug. After adding oil, install the filler plug and securely tighten. See “Installing Machinery Cover” on page 5-11 and install the machinery cover. 9/2020 MC285CB-3 5-17...
Page 208: Post-Start Inspection
See “Checking Rubber Track Tension” on page WARNING! Equipment Hazard. Always repair 5-39. parts or systems before operating the machine as needed. Check Rubber Tracks for Damage and Wear See “Inspection of Rubber Tracks” on page 5-37. 5-18 9/2020 MC285CB-3...
Page 209 Confirm that the Outrigger Angle Setting Light is lit in green on the monitor. Fig. 5-18 Set the outriggers to maximum extension. Start the machine to extend the outriggers. Verify that only the Boom Stowing Light remains green on the monitor. Fig. 5-19 9/2020 MC285CB-3 5-19...
Page 210 See “Starting the Machine” on page 4-26 and start the machine. Verify that the outrigger descends smoothly when the Outrigger Extend Switch is pressed. Also verify that the outrigger rises smoothly when the Outrigger Retract Switch is pressed. Fig. 5-23 Fig. 5-24 5-20 9/2020 MC285CB-3...
Page 211 Clockwise (right) (pull toward you). Verify the boom extends smoothly when the 14. Check for any abnormal sounds emitted from boom telescoping lever (2) is moved to the post. Repair as necessary before EXTEND (push forward). continuing operation. Fig. 5-27 9/2020 MC285CB-3 5-21...
Page 212 2 and no. 3 and boom angle is 29.2°, then measure the boom angle and working radius. If the measured value(s) do not match the moment limiter display value, contact us or our sales service agency to request inspection and repair service. 5-22 9/2020 MC285CB-3...
Page 213 If it does not light up in green even though the crane is moving, it is possible that the detection limit switch has failed or is improperly adjusted. In this case, please contact us or our sales service agency. Fig. 5-32 9/2020 MC285CB-3 5-23...
Page 214: Periodic Maintenance
Replace oil in slewing reduction Gearcase gearcase Replace oil in winch reduction gearcase Winch Gearcase Check oil level and refill oil in winch reduction gearcase Replace oil in travelling motor reduction gearcase Travel Gearcase Check/Refill oil in travelling motor reduction gearcase 5-24 9/2020 MC285CB-3...
Page 215: Periodic Maintenance Procedures
50 hours of operation. • Replace Oil in Hydraulic Oil Tank - See “Replace Oil in Hydraulic Oil Tank” on page 5-30. • Replace Hydraulic Oil Return Filter - See “Replace Hydraulic Oil Return Filter” on page 5-29. 9/2020 MC285CB-3 5-25...
Page 216 Greasing of the boom extending 4 places and retracting wire ropes Rope oil Greasing of the 1 piece winch wire rope Greasing of the Lithium 4 places outrigger top grease box pin 5-26 9/2020 MC285CB-3...
Page 217 M A E D A Mini-Crawler Crane Section 5 – PERIODIC MAINTENANCE Fig. 5-34 9/2020 MC285CB-3 5-27...
Page 218 Slowly turn the winch and stop it at a position Fig. 5-37 where the oil inspection plug (G) is visible through the inspection hole (A) on the post side. Fig. 5-35 5-28 9/2020 MC285CB-3...
Page 219: Replace Hydraulic Oil Return Filter
CAUTION: into the filler opening when refilling the oil. Place the machine on a level surface. See “TRAVELLING POSITION” on page 4-29 and put the machine in the “Travelling posture”. See “Removing Machinery Cover” on page 5-11 and remove the machinery cover. 9/2020 MC285CB-3 5-29...
Page 220: Replace Oil In Hydraulic Oil Tank
“Travelling 100 mm before the stroke end. posture”. Repeat this 4 to 5 times. See “Removing Machinery Cover” on page 5-11 and remove the machinery cover. 5-30 9/2020 MC285CB-3...
Page 221 10. After replenishing the oil, see “Air Breather Inspection” on page 5-49 and securely reattach the air breather cap (1) on the oil inlet (F). 11. See “Installing Machinery Cover” on page 5-11 and install the machinery cover. 9/2020 MC285CB-3 5-31...
Page 222: Gearcase
Install a drain plug. See "OUTRIGGER STOWING" on page 4-53 to stow the outriggers. See “Removing Machinery Cover” on page 5-11 and remove the machinery cover. 5-32 9/2020 MC285CB-3...
Page 223: Replace Oil In Winch Reduction Gearcase
(G). Gear oil in the reduction gearcase is drained. Fig. 5-46 Fig. 5-49 After gear oil in the reduction gearcase is completely drained, detach the elbow, and reinstall the drain plug and securely tighten it. 9/2020 MC285CB-3 5-33...
Page 224: Replace Oil In Travelling Motor Reduction Gearcase
Feed the gear oil through the plug hole of the oil inspection plug. NOTE: Pour in the gear oil until the oil comes out of the oil inspection plug hole. Securely tighten the oil inspection plug after refilling the oil. 5-34 9/2020 MC285CB-3...
Page 225: General Machine Maintenance
Fig. 5-54 against concrete or walls. Keep oil and chemical solvents away from the rubber tracks. Remove and clean any oil and chemical solvents immediately. Do not travel over road surfaces covered in oil. Fig. 5-58 Fig. 5-55 9/2020 MC285CB-3 5-35...
Page 226 • Material crushed and yielding oil, such as soy beans, corns and rapeseed. • Ammonium sulfate, potassium chloride or concentrated super phosphate. These are corrosive and will corrode the bonding of the cored bar section. Fig. 5-64 Fig. 5-61 5-36 9/2020 MC285CB-3...
Page 227 • Stand to the side of the adjuster when adjusting on one side. tension or removing the track. • Ensure all grease is removed from the inside of the rubber track before rotating the sprocket to remove the rubber track. Fig. 5-67 9/2020 MC285CB-3 5-37...
Page 228 See “Checking Rubber Track Tension” on remove it. page 5-39 and “Adjusting Rubber Track Tension” on page 5-39. Stow the outriggers and lower the machine to the ground. See "OUTRIGGER STOWING" on page 4-53. 5-38 9/2020 MC285CB-3...
Page 229 Standard tension of the rubber track is 5 to 10 mm clearance between the wheel tread of the centre of the track roller and the shoulder of the rubber track. Fig. 5-80 Fig. 5-78 9/2020 MC285CB-3 5-39...
Page 230 If the grease does not come out smoothly, take following measures: a. Stow the outrigger and lower the machine to the ground. See "OUTRIGGER STOWING" on page 4-53. b. Move the machine back and forth. 5-40 9/2020 MC285CB-3...
Page 231: Wire Rope
Fig. 5-84 have not been used. • Wire rope with a diameter of 9 mm should be Always use the Maeda genuine wire rope as replaced when it becomes 8.4 mm. specified for the application by Maeda. • Wire rope with a diameter of 8 mm should be replaced when it becomes 7.5 mm.
Page 232 LOWER (push forward) to lower the boom or by moving the boom telescoping lever to RETRACT (pull toward you) to retract the boom. Turn the Starter Switch to OFF to stop the machine. 5-42 9/2020 MC285CB-3...
Page 233 • Do not kink the rope when winding up. Fig. 5-90 Always unwind by the rope by pulling it off Push the winch lever forward to DOWN and the winch drum. remove the wire rope from winch drum. 9/2020 MC285CB-3 5-43...
Page 234 Adjust the length of the wire rope to keep the end of the wire Fig. 5-97 rope from protruding from the narrow hole in the winch drum. Fig. 5-94 5-44 9/2020 MC285CB-3...
Page 235 Draw the wire rope through the wedge socket. With the rope wedge (7) in position, pull the wire rope. Fasten the rope (10) together with the rope clip (4) to the dead end of the wire rope. Fig. 5-100 9/2020 MC285CB-3 5-45...
Page 236: Wire Rope - Boom Telescope Extension
3 and no. 4 (a) and between no. 4 and no. 5 (b). If the clearance of 6 mm or greater remains, make the adjustment using “Boom Telescope Wire Rope Adjustment” on page 5-47. Fig. 5-102 5-46 9/2020 MC285CB-3...
Page 237 • If the clearance (a) is zero, make the b. After completion of Steps 1 and 2, and as adjustment in accordance with Step 4. the result of measurement thereof, if the clearance (a) of 5 mm or greater remains, repeat the adjustment procedure. 9/2020 MC285CB-3 5-47...
Page 238 (14) for the no. 5 boom pull-in wire rope (7) further by one more turn. Fig. 5-107 c. Lock the adjustment nuts (14) and (16), for no. 5 boom pull-in and pull-out wire ropes (7) and (8) with respective lock nuts (13) and (15). 5-48 9/2020 MC285CB-3...
Page 239: Air Breather Inspection
4. Twist the hexagonal wrench outward and cover (2), and secure with the bolt (3). rotate the air breather cap (1) Tightening torque: 6.9 to 8.8 N·m (0.7 to counterclockwise. 0.9 kgf·m) Fig. 5-111 5. Remove the air breather cap (1). 9/2020 MC285CB-3 5-49...
Page 240 6. Secure the case (7) using the three bolts (8). Check that the strainer (9) is retained by the case (7). 7. See “Air Breather Inspection” on page 5-49 and securely reattach the air breather cap (1) on the oil inlet (F). 5-50 9/2020 MC285CB-3...
Page 241: Drain Water And Sediment Inside Hydraulic Oil Tank
See “Removing Machinery Cover” on page 5-11 and remove the machinery cover. See “Air Breather Inspection” on page 5-49 and remove the air breather cap (1) from the oil inlet (F) on the top of the hydraulic oil tank. Fig. 5-116 9/2020 MC285CB-3 5-51...
Page 242: Storage
(Cylinder rod corrosion prevention) See • Charge the battery. “TRAVELLING POSITION” on page 4-29. • Perform all specified pre-start checks before starting and operating. Fig. 5-119 5-52 9/2020 MC285CB-3...
Page 243: Cold Temperature Preparation
• Remove dirt and water from the machine. Keep the hydraulic cylinder rod surfaces clean to prevent seals from being damaged from dirt mixing with water. • Park the machine on solid, dry ground. Use boards as support, if necessary, to park the machine on. 9/2020 MC285CB-3 5-53...
Page 244: Searcher Hook Inspection And Maintenance
Legal Inspection produce economical use of this machine. Always If a periodic safety inspection is required by the replace with a Maeda genuine item. Check parts laws and regulations of your country, perform that catalogue for correct part number for parts inspection in addition to the inspection items listed request.
Page 245: Inspection And Maintenance List
Installation Check of Position Pin and Lynch Pin See “Position Pin and Lynch Pin” on page 5-56. Post-Start – After Starting Machine Check Moment Limiter for Operation See “Moment Limiter for Operation (Searcher Hook (Searcher Hook Mode) Mode)” on page 5-57. 9/2020 MC285CB-3 5-55...
Page 246: Pre-Start - Before Starting Machine
Fig. 5-120 Greasing • Wipe off and clean old grease from contact point (3) of shackle (2) and E-boom hole, and contact point (4) of hook (1) and shackle (2), then apply new lithium grease. Fig. 5-121 5-56 9/2020 MC285CB-3...
Page 247: Pre-Start - After Starting Machine
This checking operation must be operated slowly, and if machine does not auto-stop by overloading, immediately stop the operation, and perform recovery operation caused by overloading. NOTICE: When measuring actual working radius, measure from hook position of searcher hook. 9/2020 MC285CB-3 5-57...
Page 248: Troubleshooting
Travel lever not in Move travel lever to Crane/Outrigger position “Crane/Outrigger”. Set (operate) boom in stow Boom is not in stow position position. Outriggers are not in setting Crane does not operate Set (operate) all four outriggers. position 5-58 9/2020 MC285CB-3...
Page 249: Electrical Components
Working at high elevation Move to lower elevation. Take measures to protect against Battery and controller overheat High ambient temperature high temperatures. Warming up is turned on. Turn off warming up. Cooling fan defect * Inspect and replace. 9/2020 MC285CB-3 5-59...
Page 250: Electric Motor
Move to lower elevation. Motor emits abnormal sound or vibration Take measures to protect against High ambient temperature while in operation. high temperatures. Warming up is turned on. Turn off warming up. Defective cooling fan * Inspect and replace. 5-60 9/2020 MC285CB-3...
Page 251: Radio Remote Control System
Receiver has failed. Check receiver cable for disconnection. Connection to the machine is Check receiving status using receiver Individual commands interrupted. monitor LED. cannot be executed. Controller has failed. * Inspect or replace controller on machine main unit. 9/2020 MC285CB-3 5-61...
Page 252: Error Codes
☆ A*** Battery charger error －－ ★ BMU*** BMU error －－ ★ F***** Motor controller error －－ ★ The numbers indicated by *** in the error code will vary depending on the individual error. 5-62 9/2020 MC285CB-3...
Page 253: Slewing Position Calibration
Fig. 5-123 (If the extent of offset is outside the permitted margin, the warning will be displayed again after NOTICE: You do not need to stow the boom here. slewing.) Only the boom slewing position is being aligned. 9/2020 MC285CB-3 5-63...
Page 254 Section 5 – TROUBLESHOOTING Mini-Crawler Crane M A E D A This Page Intentionally Left Blank 5-64 9/2020 MC285CB-3...
Page 255 MAEDA MINI-CRAWLER CRANE MC285CB-3 OPERATION MANUAL Document No : 102BE-OM2009-00 First edition : 11st September 2020 Maeda Seisakusho Co., Ltd. 1095 Onbegawa, Shinonoi Nagano, Nagano 388-8522, Japan No part of this manual can be reproduced in any form without permission.

Maeda MC285CB-3 Operation Manual

Section 1 INTRODUCTION

Section 2 SAFETY

Specifications, Terminology and Capacity Charts

Operation

Maintenance and Inspection

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