Page 1 102ME-OM1901-00 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
Searcher Hook Dimensional Drawing-Electric Motor Option ........3-10 Auxiliary Winch Dimensional Drawing-Standard ............ 3-11 Auxiliary Winch Dimensional Drawing-Electric Motor Option ........3-11 Outrigger Width Dimensional Drawing ..............3-12 RATED TOTAL LOAD CHARTS ..................3-13 Programmable Moment Limiter ................3-13 Reading the Angle Indicator ................3-13 1/2019 MC285C-3...
Page 4 1 8 B O utrigger Mode Switch ..................4-11 1 9 B U ser Mode Switch ..................... 4-11 2 0 B H ook Stowage/Boom Stowage Switch ............... 4-11 Boom Lift Bypass Switch ................... 4-11 Level Gauge ...................... 4-11 1/2019 MC285C-3...
Page 5 6 1 B E mergency Engine Stop Switch (EMO) ............. 4-24 TRAVELLING POSITION ....................4-24 TRAVELLING CONTROLS AND OPERATION ............... 4-25 Directional Controls ....................4-27 Travelling Forward ..................... 4-27 Travelling in Reverse ..................4-27 Neutral Stop ....................... 4-27 1/2019 MC285C-3...
Page 6 When Boom Stowage Position is inside Operation Prohibited Zone ....4-46 Reading Rated Total Load Table Using Outrigger Setup Angle ......4-46 Allowable Slewing Angles in Multi-Angle Outrigger State ........4-47 OUTRIGGER STOWING ....................4-48 Before Stopping Engine ..................4-48 After Stopping Engine ..................... 4-49 1/2019 MC285C-3...
Page 7 Boom Length Display..................4-71 Boom Angle Display ..................4-71 Maximum Lifting Height above Ground Display ..........4-72 Working Radius Display ..................4-72 Slewing Angle Display ..................4-72 Boom Section Display ..................4-72 Number of Falls Display ..................4-72 1/2019 MC285C-3...
Page 8 Transmitter Power Switch .................. 4-85 Engine Start/Stop Switch ................... 4-85 Display Operation Switch ................... 4-85 Horn Switch ....................... 4-85 Boom Lift Bypass Switch ................... 4-85 Micro Speed Switch ................... 4-85 Emergency Engine Stop (EMO)/Remote Control System Power OFF Switch ... 4-85 1/2019 MC285C-3...
Page 9 Hook Raising/Lowering Operation ..............4-101 Boom Lifting/Lowering Operation ..............4-102 Boom Telescoping Operation ................4-102 Slewing Operation ................... 4-103 Micro Speed Mode Switch Operation .............. 4-103 Emergency Engine Stop Switch (EMO) Operation .......... 4-103 Horn Switch Operation ..................4-104 1/2019 MC285C-3...
Page 10 Removing the Electric Unit ................... 4-121 Reinstalling the Electric Unit ................. 4-123 SEARCHER HOOK SAFETY PRECAUTIONS .............. 4-124 Moment Limiter Settings ..................4-124 Searcher hook position settings ............... 4-124 SEARCHER HOOK COMPONENTS (OPTION) ............4-125 SEARCHER HOOK MONITOR ..................4-126 viii 1/2019 MC285C-3...
Page 11 Handling and Service of Engine Oil and Filters ............5-4 Handling and Service of Engine Diesel Fuel ............5-5 Handling and Service of Engine Coolant ..............5-6 Handling and Service of Gearcase Oil ..............5-6 Handling and Service of Hydraulic Oil and Filters ............ 5-7 1/2019 MC285C-3...
Page 12 Check / Add Slewing Motor Reduction Gearcase Oil ........5-24 Check / Clean Radiator and Oil Cooler Fins ............5-24 Check Horn ......................5-24 Check Working Light Operation ................. 5-25 Check Fuses ...................... 5-25 Check Cracks, Deformation or Damage of Boom and Frame ......5-25 1/2019 MC285C-3...
Page 13 Battery Charging ....................5-54 Using Battery Booster Cables ................5-55 Fuses ........................5-56 Rubber Tracks ......................5-57 General Information and Precautions ..............5-57 Inspection of Rubber Tracks ................5-59 Removal of Rubber Tracks ................5-59 Installation of Rubber Tracks ................5-60 1/2019 MC285C-3...
Page 14 Pre-Start – Before Starting Engine ................. 5-79 Boom Head, Frame and Hook ................5-79 Position Pin and Lynch Pin ................5-79 Wire Rope ......................5-79 Over Winding Detector ..................5-79 Winch Motor ...................... 5-79 Winch Drum ....................... 5-79 1/2019 MC285C-3...
Page 15 Replace Oil in Winch Reduction Gearcase ............5-85 TROUBLESHOOTING ..................... 5-87 Machine Body ......................5-87 Engine ........................5-88 Electrical Components .................... 5-89 Remote Control System ..................5-90 Electric Motor ......................5-91 Error Codes ......................5-93 Slewing Position Calibration ................... 5-95 1/2019 MC285C-3 xiii...
Page 16 Table of Contents Mini-Crawler Crane M A E D A This Page Intentionally Left Blank 1/2019 MC285C-3...
Page 17: Introduction
Section 1 INTRODUCTION 1/2019 MC285C-3...
Page 18 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 19 Section 2 SAFETY 1/2019 MC285C-3...
Page 20: 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 21 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. 1/2019 MC285C-3...
Page 22 ・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. 1/2019 MC285C-3...
Page 23 ・Always read and follow safety-related and eye and hearing precautions found on containers of hazardous protection, as required by substances like parts cleaners, primers, the task at hand. sealants and sealant removers. ・Undersized wiring systems can cause an electrical fire. 1/2019 MC285C-3...
Page 24 ・Never check for a hydraulic fluid or fuel leak with horn as a warning before starting the your hands. Always use a piece of wood or engine. cardboard. Have your authorised Maeda dealer or distributor repair the damage. ・Always stop the engine before beginning service.
Page 25 Working Above Machine Hazard ・Always maintain three-point contact as you climb on or off an elevated work surface. ・Do not jump from the elevated work surface. ・Do not climb on the boom, outrigger or other machine surface. 1/2019 MC285C-3...
Page 26 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. 1/2019 MC285C-3...
Page 27: Safety Label Locations
M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS SAFETY LABEL LOCATIONS Machine Body Fig. 2-1 1/2019 MC285C-3...
Page 28 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A Fig. 2-2 2-10 1/2019 MC285C-3...
Page 29 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [8] 102-3324500 [5] 102-4748700 (2 places) [9] 350-4539700 (2 places) [6] 102-4749900 [10] 103-4592500 [7] 553-4267400 (2 places) 1/2019 MC285C-3 2-11...
Page 30 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [16] 350-4432100 [17] 349-4427400 [18] 553-4268000 2-12 1/2019 MC285C-3...
Page 31 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [19] 102-2205800 1/2019 MC285C-3 2-13...
Page 32 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [20] 349-4427800 [23] 349-4427500 [24] 553-4267100 [21] 349-4427100 [25] 353-4488700 (3 places) [22] 349-4421400 [26] 839-4239100 2-14 1/2019 MC285C-3...
Page 33 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [31] 353-3235200 [27] CL000200010 [32] 102-3427400 [28] 104-4550800 [30] 353-4488400 [34] 349-4422000 1/2019 MC285C-3 2-15...
Page 34 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [40] 349-4427300 [35] 553-4267500 (2 places) [41] 349-4427900 [37] 102-4750400 [42] 349-4421900 [38] 353-4488600 2-16 1/2019 MC285C-3...
Page 35 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [47] 101-4593300 (4 places) [48] 103-4526900 [49] 553-4267700 (4 places) 1/2019 MC285C-3 2-17...
Page 36 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [51] 102-2205900 2-18 1/2019 MC285C-3...
Page 37 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [54] 553-4267600 [59] 102-4619800 [61] 584-4581700 (2 places) [55] 349-4427200 [57] 103-4604800 [58] 103-4604900 1/2019 MC285C-3 2-19...
Page 38 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [62] 102-3425800 [64] 102-4749400 [66] 102-4750600 2-20 1/2019 MC285C-3...
Page 39: Electric Motor (Option)
M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS Electric Motor (Option) Fig. 2-3 1/2019 MC285C-3 2-21...
Page 40 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [4] 200-4652200 [1] 102-3427500 [2] 553-4267300 [3] 350-4539700 2-22 1/2019 MC285C-3...
Page 41: Searcher Hook (Option)
M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS Searcher Hook (Option) Fig. 2-4 1/2019 MC285C-3 2-23...
Page 42 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) 2-24 1/2019 MC285C-3...
Page 43 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [10] 102-2206800 1/2019 MC285C-3 2-25...
Page 44: Auxiliary Winch (Option)
Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A Auxiliary Winch (Option) Fig. 2-5 2-26 1/2019 MC285C-3...
Page 45 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [1] 102-2209700 1/2019 MC285C-3 2-27...
Page 46 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [5] 584-3438600 [7] 553-4267500 (４ places) [8] 104-3287200 2-28 1/2019 MC285C-3...
Page 47: Specifications, Terminology And Capacity Charts
Section 3 SPECIFICATIONS, TERMINOLOGY AND CAPACITY CHARTS 1/2019 MC285C-3...
Page 48: Machine Features
A remote control system allows remote crane operation. 1/2019 MC285C-3...
Page 49: 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 1/2019 MC285C-3...
Page 50: Principle Specifications List
(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 – 2.2 km/h Travelling System Gradeability 20 degrees Ground pressure 50.0 kPa 54.3 kPa 1/2019 MC285C-3...
Page 51 • Storage temperature: -20° to 60°C • Operating humidity: Max. 90% RH (no condensation) • Atmosphere: Outdoor environment free from explosive, flammable and corrosive gases, moisture and excessive dust particles • Altitude: Max. 1000 m • Vibration: Max. 0.5 G 1/2019 MC285C-3...
Page 52: Remote Control System Specifications
Outrigger 1 GROUND/STOWAGE / Slew Transmitter power switch Engine start/stop switch Micro speed switch Operation switch Boom raising cancel switch Horn switch Emergency engine stop (EMO)/remote control system power OFF switch Rotary switch Operation mode selector switch Dial switch Display operation switch 1/2019 MC285C-3...
Page 53: Searcher Hook Specifications
Mass and dimensions Stowed 3000 × 750 × 1470 mm 3485 × 750 × 1470 mm length × width × height Crane capacity 850 kg Maximum working radius Performance 9.7 m Maximum lifting height above ground 8.9 m 1/2019 MC285C-3...
Page 54: Auxiliary Winch Specifications
Winch system Hook hoist speed 30 m/min (4 layers, single fall) IWRC 6 × Ws (26) 0/0 ϕ8 × 108 m Hoist wire rope Only the auxiliary winch dedicated values are given here. 1/2019 MC285C-3...
Page 55: Dimensional Drawings
M A E D A Mini-Crawler Crane Section 3 –DIMENSIONAL DRAWINGS DIMENSIONAL DRAWINGS Machine Dimensional Drawing–Standard Fig 3-6 Machine Dimensional Drawing–Electric Motor Option Fig 3-7 1/2019 MC285C-3...
Page 56: Searcher Hook Dimensional Drawing-Standard
Section 3 – DIMENSIONAL DRAWINGS Mini-Crawler Crane M A E D A Searcher Hook Dimensional Drawing-Standard Fig 3-8 Searcher Hook Dimensional Drawing-Electric Motor Option Fig 3-9 3-10 1/2019 MC285C-3...
Page 57: Auxiliary Winch Dimensional Drawing-Standard
M A E D A Mini-Crawler Crane Section 3 –DIMENSIONAL DRAWINGS Auxiliary Winch Dimensional Drawing-Standard Fig 3-10 Auxiliary Winch Dimensional Drawing-Electric Motor Option Fig 3-11 1/2019 MC285C-3 3-11...
Page 58: Outrigger Width Dimensional Drawing
Section 3 – DIMENSIONAL DRAWINGS Mini-Crawler Crane M A E D A Outrigger Width Dimensional Drawing Fig 3-12 3-12 1/2019 MC285C-3...
Page 59: Rated Total Load Charts
Fig. 3-13 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.” 1/2019 MC285C-3 3-13...
Page 60: 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. 3-16 3-14 1/2019 MC285C-3...
Page 61 ②. Fig. 3-17 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. 3-18 1/2019 MC285C-3 3-15...
Page 62: 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. 3-16 1/2019 MC285C-3...
Page 63: 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 64: 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. 3-18 1/2019 MC285C-3...
Page 65: 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 1/2019 MC285C-3 3-19...
Page 66: 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 3-20 1/2019 MC285C-3...
Page 67: 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 1/2019 MC285C-3 3-21...
Page 68: Rated Total Load Chart For Auxiliary Winch
73.5 50.0 72.5 33.5 67.0 50.0 40.5 56.0 27.5 49.5 24.5 48.0 58.0 44.0 55.5 42.5 54.5 61.0 34.0 49.5 57.5 24.0 44.0 53.5 39.0 50.0 37.5 49.0 30.5 44.5 21.0 39.5 35.5 34.0 27.5 19.0 Prohibited 3-22 1/2019 MC285C-3...
Page 69: 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 3-13. Fig 3-22 1/2019 MC285C-3 3-23...
Page 70 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 3-24 3-24 1/2019 MC285C-3...
Page 71: 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 3-25-1 1/2019 MC285C-3 3-25...
Page 72 Section 3 –WORKING RADIUS/LIFTING HEIGHT Mini-Crawler Crane M A E D A Fig 3-25-2 3-26 1/2019 MC285C-3...
Page 73 M A E D A Mini-Crawler Crane Section 3 – WORKING RADIUS/LIFTING HEIGHT Fig.3-25-3 1/2019 MC285C-3 3-27...
Page 74: Working Radius/Lifting Height For Auxiliary Winch
• When using auxiliary winch, always set moment limiter to auxiliary winch. • Do not use single fall hook block and crane hook block at the same time. • Use of crane hook block is prohibited in auxiliary winch mode. Fig. 3-26 3-28 1/2019 MC285C-3...
Page 75 Section 4 OPERATION 1/2019 MC285C-3...
Page 76: Machine Components
22 - Track Roller 10 - Outrigger Cylinder 23 - Tandem Track Roller 11 - Machinery Cover 24 - Carrier Roller 12 - Rubber Track 25 - Travelling Motor and Sprocket 13 - Fuel Tank (under the engine) 26 - Monitor 1/2019 MC285C-3...
Page 77 Outrigger Cylinder For operation method of travelling, see A cylinder for extending the outrigger. “TRAVELLING CONTROLS AND OPERATION” on page 4-25. Machinery Cover A left-right splitting machinery cover. Monitor A display device to display the status of the vehicle. 1/2019 MC285C-3...
Page 78: Travel Controls
5 - Emergency Engine 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 8 - Preheat Lamp 1/2019 MC285C-3...
Page 79: Switches
• Travel: Pull up the lever while releasing the Fig. 4-6 lock to allow travel operations. 1 2 B • Crane/Outrigger: Push in and stow the lever while releasing the lock to allow crane/outrigger operations. 1/2019 MC285C-3...
Page 80: Horn Switch
• ON: Push the switch upward to turn the Working Light on. • OFF: Push the switch downward to turn the Working Light off. Fig. 4-8 The working light does not operate when the Starter Switch is in the OFF position. 1/2019 MC285C-3...
Page 81: Crane And Boom Controls
1 - Accelerator Lever 5 - Boom Lift Lever 2 - Slewing Lever 6 - Emergency Engine Stop Switch (EMO) 7 - Horn Switch 3 - Boom Telescoping Lever 8 - Engine Start/Stop Switch 4 - Winch Lever 1/2019 MC285C-3...
Page 82: Controls
Emergency Engine Stop Switch (EMO) The Emergency Engine Stop Switch (EMO) is used to stop the engine in the event of an accident or emergency. The Emergency Engine Stop Switch (EMO) must be in the OFF position to start the engine. 1/2019 MC285C-3...
Page 83: Monitor
NOTICE: When the engine is started, the battery voltage can suddenly decrease depending on the temperature and battery condition. In such a case, the machine monitor display can temporarily disappear, but this is normal. Fig. 4-13 1/2019 MC285C-3...
Page 84: 8 B O Utrigger Mode Switch
4 - Boom Lift Bypass Switch 12 - Moment Limiter Status Display 5 - Level Gauge 13 - Warning Display 6 - Time Display 14 - Normal/Multi Mode Display 7 - Hour Meter Display 8 - Fuel Gauge 4-10 1/2019 MC285C-3...
Page 85: Boom Lift Bypass Switch
Press the switch to display the selection for hook stowage and boom stowage. Level Gauge Displays the tilt status of the machine. The position of the yellow bubble indicates the direction in which the machine is tilting. Fig. 4-17 Fig. 4-20 1/2019 MC285C-3 4-11...
Page 86: Time Display
R emote Control System Connection 2 7 B Display Displays the current remote control system connection status. • On: The remote control system is connected. • Off: The remote control system is not Fig. 4-25 connected. Fig. 4-23 4-12 1/2019 MC285C-3...
Page 87: 2 B N Umber Of Falls Change
(2-2) Not in use (2-9) Software Version Check (2-3) Error History Display (2-10) Remote Control System Accelerator (2-4) Consumables Display Switch (2-5) Monitor Brightness Adjustment (2-11) Home Switch (2-6) Time Setting (2-12) Display Page Change (2-7) Language Change 1/2019 MC285C-3 4-13...
Page 88: Consumables Display
No: Consumable icons are not displayed on the Home screen, even if the replacement time is approaching or has been exceeded. Fig. 4-29 For more information on consumables list, see “CONSUMABLES” on 5-9. 4-14 1/2019 MC285C-3...
Page 89: Monitor Brightness Adjustment
Japanese. Make adjustments with ◄ or ► of the • Reset: Switches to the default language adjustment switch in this condition. setting. When the check mark is finally pressed, editing is completed. Fig. 4-36 Fig. 4-33 1/2019 MC285C-3 4-15...
Page 90: Software Version Check
Fig. 4-38 Remote Control System Accelerator Switch The acceleration value can be adjusted for use of the remote control system operation lever. Set the desired value using ◄ or ► on the adjustment switch (2-10A). Fig. 4-39 4-16 1/2019 MC285C-3...
Page 91: 2 B E Ngine Oil Pressure Abnormality
4 - Engine Coolant Temperature Abnormality 8 - Slew Detection Abnormality 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 5-93 and correct the problem. 1/2019 MC285C-3 4-17...
Page 92: 4 B C Harge Capacity Abnormality
Fig. 4-43 Fig. 4-41 NOTICE: Error codes are also displayed if faults other than consumable related indications are displayed. For more information on error codes, see “Error Codes” on page 5-93, and take corrective action. 4-18 1/2019 MC285C-3...
Page 93: Cold Weather Operation
NOTICE: When cold, always perform the warm-up operation. Sufficient warm-up operation is necessary when starting in cold temperatures. Insufficient warm-up operation will slow down the movement response of the travelling system or crane system to the 1/2019 MC285C-3 4-19...
Page 94: Starting
CAUTION: Do not start the engine by shorting the starter circuit or any other starting method not stated in this manual. Only use the starting procedure as described in this manual to start the engine. 4-20 1/2019 MC285C-3...
Page 95: Starting The Engine With The Engine Start/Stop Switch
Pull the acceleration lever upward to • If your engine is difficult to start, see “Starting operate the engine at medium speed (lever the Engine” on page 4-20 and use the Starter stroke about midway). Switch to start it. Fig. 4-52 1/2019 MC285C-3 4-21...
Page 96: Warm-Up
Fig. 4-58 NOTICE: If the engine stalls, push the switch to the STOP position and then push the switch up to the START position to restart the engine. 4-22 1/2019 MC285C-3...
Page 97 If not, smoothly more than 360 degrees correct it as necessary. respectively and that it stops immediately when the slewing lever is returned to NEUTRAL. Correct any abnormality as necessary. Fig. 4-62 Fig. 4-65 1/2019 MC285C-3 4-23...
Page 98: Stopping
The Emergency Engine Stop Switch (EMO) must be in the OFF position to start the engine. Fig. 4-67 • ON: Press switch down to stop engine. • OFF: Turn switch clockwise (right) to allow the switch to return to the ON position. 4-24 1/2019 MC285C-3...
Page 99: Travelling Controls And Operation
Do not allow a person to sit or stand on the travelling Fig. 4-72 dolly or boom while moving the machine. Do not travel with a load placed on the travelling dolly or boom. 1/2019 MC285C-3 4-25...
Page 100 Do not travel on the following ground conditions: • Soft or lose ground • Ground near cliffs • Roadsides • Deep gullies • Wet ground • Ground disturbed by dynamite or earthquake • Filled holes • Uneven ground 4-26 1/2019 MC285C-3...
Page 101: Directional Controls
• Pull the left travelling lever toward you to turn right in reverse direction. Fig. 4-76 Travelling in Reverse Pull the left and right travelling levers slowly at the same time to move in reverse. Fig. 4-77 1/2019 MC285C-3 4-27...
Page 102: Spin Turns
NEUTRAL. Fig. 4-79 Right Spin Turn Push the left travelling lever forward while pulling the right travelling lever toward you to rotate the left and right rubber tracks in the opposite direction for a right spin turn. 4-28 1/2019 MC285C-3...
Page 103: 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. 4-82 1/2019 MC285C-3 4-29...
Page 104: 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. 4-30 1/2019 MC285C-3...
Page 105: Before Stowing Outriggers
• Rotate (Stow) the outrigger and secure flash with position pin. (Working Status Lamp [red] flashes) • Stop the engine. When the machine tilts 3 degrees or more Crane inclination alarm device is Warning alarm buzzer sounds continuously during outrigger stowing operation activated. 1/2019 MC285C-3 4-31...
Page 106: Outrigger Components
10 - Inner Box 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 4-32 1/2019 MC285C-3...
Page 107: 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 1/2019 MC285C-3 4-33...
Page 108: Outrigger Ground Set-Up Lights 1 To 4
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. 4-89 Fig. 4-87 4-34 1/2019 MC285C-3...
Page 109: Boom Stowing Light
(1) on the travel undercarriage (fixed side). Fig. 4-91 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. 1/2019 MC285C-3 4-35...
Page 110: 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 4-36 1/2019 MC285C-3...
Page 111 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 Fig. 4-99 operation 3 8 B • Rear outrigger 2 and 3 simultaneous operation Fig. 4-96 1/2019 MC285C-3 4-37...
Page 112: Outrigger Operation Lamp
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. 4-103 4-38 1/2019 MC285C-3...
Page 113: Setting Outriggers (Normal Outrigger State)
Do not allow people around the working area until the outriggers are Turn the rotary (3) so that the seal placed. “Standard” affixed to its side and the seal “Standard” affixed to the side of frame are aligned. Fig. 4-108 1/2019 MC285C-3 4-39...
Page 114 “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. 4-113 4-40 1/2019 MC285C-3...
Page 115: Performed With Engine On
3 degrees. Once the outriggers are in place, return to the Home screen on the monitor. Fig. 4-115 Check the outrigger number on the monitor against the actual outrigger number to determine the outrigger used. Fig. 4-116 1/2019 MC285C-3 4-41...
Page 116: 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. 4-118 Fig. 4-121 Fig. 4-119 4-42 1/2019 MC285C-3...
Page 117: Outrigger Setting Modes
The machine See “OUTRIGGER SETTING” on page 4-38 for could become unsteady if a short working proper setting of the outriggers. radius is not used and the engine is operating at a high speed. 1/2019 MC285C-3 4-43...
Page 118: Other Than Max" Outrigger Position
Fig. 4-128 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 3-13 for correct capacities. 4-44 1/2019 MC285C-3...
Page 119: 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. 4-129 1/2019 MC285C-3 4-45...
Page 120: When Boom Stowage Position Is Inside Operation Prohibited Zone
• Boom angle of at least 50 degrees The boom can be lowered to an angle at or below 50 degrees only when the slewing angle is within the 340-degree to 20-degree range. Fig. 4-130 Fig. 4-131 4-46 1/2019 MC285C-3...
Page 121: Allowable Slewing Angles In Multi-Angle Outrigger State
340 to 250° 20 to 250° Maximum Multi Other than maximum Maximum 110 to 20° 110 to 340° Maximum Multi Multi Maximum 110 to 250° 110 to 250° Maximum Maximum Multi Maximum 340 to 250° 20 to 250° 1/2019 MC285C-3 4-47...
Page 122: 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. 4-133 Select outrigger mode on the Home screen. Fig. 4-136 Turn off the engine. 4-48 1/2019 MC285C-3...
Page 123: After Stopping Engine
“Stow” seals are aligned. (1), pull out the position pin. 10. Stow the other three outriggers in the same manner. 11. After stowing the outriggers, make sure that each position pin has been securely inserted and retained. Fig. 4-139 1/2019 MC285C-3 4-49...
Page 124: Operation In Emergencies
Fig. 4-144 Turn on the Emergency Outrigger Fig. 4-147 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. 4-50 1/2019 MC285C-3...
Page 125: 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. 1/2019 MC285C-3 4-51...
Page 126: 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. 4-52 1/2019 MC285C-3...
Page 127: 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 1/2019 MC285C-3 4-53...
Page 128: 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. 4-54 1/2019 MC285C-3...
Page 129 If caught by an obstacle, do not forcibly wind the hoisted load. Untangle the caught item before winding the load. 1/2019 MC285C-3 4-55...
Page 130: Before Crane Operation
If the Moment Limiter Override Switch is “ON” (Override), the Working Status Lamp will flash in red, and an alarm buzzer will sound intermittently. Switch on the Home screen on the monitor. NOTICE: The crane cannot be operated while in Outrigger mode. 4-56 1/2019 MC285C-3...
Page 131: Crane Operation Position
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. 1/2019 MC285C-3 4-57...
Page 132 Only hoist the load when the hook block and wire rope cable are perpendicular WARNING! Tip Hazard. Never allow a hoisted to the ground. load to contact an outrigger. Always use caution to prevent the hoisted load from contacting an outrigger. 4-58 1/2019 MC285C-3...
Page 133: Hook Raising / Lowering Procedure
Do not pull a load sideways or draw it in while telescoping the boom. These conditions may cause unreasonable force on the machine and uncontrollable movement of the load. 1/2019 MC285C-3 4-59...
Page 134: Boom Telescoping Procedure
Fig. 4-167 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. 4-60 1/2019 MC285C-3...
Page 135: Slewing Procedure
Stowing Light turns on. The Hook Stowage Switch cancels the auto-stop function of the over winding detector. Stowing Procedure Fully retract the boom. Set the slewing angle to “0 degrees.” Lower the boom until it stops automatically. 1/2019 MC285C-3 4-61...
Page 136 • Continue pressing the switch until the hook is fully stowed. Fig. 4-171 Steady green: Boom stowed Steady yellow: Only stowed at slewing position Flashing red: Not yet stowed in slewing position or boom fully lowered position 4-62 1/2019 MC285C-3...
Page 137: Moment Limiter (Overload Detector)
11 - Outrigger Position Detection Device • (B) Working Status Lamp (yellow) 12 - Moment Limiter Override Switch (Pre-warning Light for load factor of 90 to 100%) • (C) Working Status Lamp (green) (Working Light for load factor of less than 90%) 1/2019 MC285C-3 4-63...
Page 138: 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. 4-64 1/2019 MC285C-3...
Page 139: 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. 4-177 1/2019 MC285C-3 4-65...
Page 140: Working Range Limits Device
“peep”. • 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. 4-180 4-66 1/2019 MC285C-3...
Page 141: Number Of Falls Change
Flashing red > Flashing yellow > Flashing green Outrigger Extension Detection The extension of the outriggers is detected by limit switches mounted on each of the four outriggers. The rated total load changes based on outrigger extension. 1/2019 MC285C-3 4-67...
Page 142: Prohibited Actions After Auto-Stop
Operating at any engine 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. 4-182 4-68 1/2019 MC285C-3...
Page 143 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. 4-187 1/2019 MC285C-3 4-69...
Page 144: Moment Limiter Display
21 - Working Radius Upper Limit Display 10 - Number of Falls Display 22 - Clockwise (Right) Slewing Angle Limit Switch 11 - Over Winding Display 23 - Counterclockwise (Left) Slewing Angle Limit Switch 12 - Over-Unwinding Stop Display 4-70 1/2019 MC285C-3...
Page 145: Load Factor Display
• When the crane stops, the numerical value of actual load display changes if there is slewing of Fig. 4-193 load. 1/2019 MC285C-3 4-71...
Page 146: Maximum Lifting Height Above Ground Display
The working radius refers to the horizontal Number of Falls Display distance from the centre of slewing of the crane to the centre of the hook. Displays the current number of falls when the crane is being operated. Fig. 4-195 Fig. 4-198 4-72 1/2019 MC285C-3...
Page 147: Over Winding Display
Counterclockwise (Left) Slewing Angle Limit Display Operating limits can be set in cases in which the operating range is restricted by moving the boom to the actual operating range limit to be set and holding down the corresponding switch. 1/2019 MC285C-3 4-73...
Page 148: 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 4-66. 4-74 1/2019 MC285C-3...
Page 149: Setting Or Cancelling The Upper Limit Value Of Lifting Height
Select the yellow indicator for the direction to be cleared and hold the switch. The monitor display changes to the blue colour and the upper limit value or lower limit value setting is cancelled. 1/2019 MC285C-3 4-75...
Page 150: Setting Or Cancelling The Upper Limit Value Of The Working Radius
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. 4-76 1/2019 MC285C-3...
Page 151: Moment Limiter Override Switch
• To discontinue OVERRIDE, at any time under 3 minutes, turn the engine starter ignition key to OFF shutting down the machine. Restart the machine as normal, and the Moment Limiter system will commence with normal start up sequence. Fig. 4-208 1/2019 MC285C-3 4-77...
Page 152: Remote Control System Introduction
Damage to the transmitter may with other fingers and hold the transmitter. result if water is allowed to enter it, resulting in internal component damage and/or electrical failure. Fig. 4-211 Always manipulate levers and switches with your fingers. 4-78 1/2019 MC285C-3...
Page 153: Foreign Objects
• Extremely low temperature (-20°C or below) or direct cold air • Direct sunlight • Near warm air outlets of vehicles • Near heating system • High humidity Fig. 4-215 1/2019 MC285C-3 4-79...
Page 154: Operation Environment
Do not disassemble or modify the battery. Doing authorised personnel are permitted to weld. so may cause electrolyte leakage, heat • Disconnect the battery terminals to prevent generation and rupture of the battery. battery explosions. 4-80 1/2019 MC285C-3...
Page 155: Operation Precautions
• In emergencies or if even a minor problem arises within the machine operating area, press the Emergency Engine Stop Switch (EMO) immediately to shut down the transmitter. 1/2019 MC285C-3 4-81...
Page 156: Terminating Operation
Receiver The receiver which is installed on the crane is equipped with control box (1), monitor LED (2), connector (3), antenna (4), etc. The receiver receives operation signals from the transmitter and controls the crane. Fig. 4-224 4-82 1/2019 MC285C-3...
Page 157: Transmitter Accessories
“forced zero position” function is activated to return to the state in which no operation lever is pressed, to avoid miss-operation or erroneous activation. • This remote control system detects an unused frequency automatically. 1/2019 MC285C-3 4-83...
Page 158: Remote Control System Components
7 - Emergency Engine Stop (EMO)/Remote L2 - LED Light (Control Panel) Control System Power OFF Switch M1 - Left Display 8 - Cable Connection Port (Not used) M2 - Right Display 9 - No. 1 Outrigger/Slewing Operation Lever 4-84 1/2019 MC285C-3...
Page 159: Transmitter Power Switch
“Outrigger Operation” on page 4-98. Micro Speed Switch For more information on crane operations, see “Crane Operation” on page 4-101. Used to operate the crane at slow speed when operating the crane. 1/2019 MC285C-3 4-85...
Page 160: Operation Mode Selector Switch
For more information on turning on the lights, see “Transmitter Display Components” on page 4-87. Left Display Right Display Use this display to view various kinds of information. For more information on display, see “Transmitter Display Components” on page 4- 87 . 4-86 1/2019 MC285C-3...
Page 161: Transmitter Display Components
M A E D A Mini-Crawler Crane Section 4 – REMOTE CONTROL SYSTEM COMPONENTS Transmitter Display Components Fig. 4-233 1/2019 MC285C-3 4-87...
Page 162: Standby Screen
(1) LED light (front) ON/OFF ・RTL: Indicates the rated total load. (2) LED light (operation panel) ON/OFF ・AL: Indicates the actual load. (3) Move to the crane/outrigger screen (4) Move to remote control menu 4-88 1/2019 MC285C-3...
Page 163 M A E D A Mini-Crawler Crane Section 4 – REMOTE CONTROL SYSTEM COMPONENTS [Remote control menu list] Fig. 4-237 1/2019 MC285C-3 4-89...
Page 164: Status Indications Of Display
Indicates the remaining battery levels as follows: Fig. 4-240 Error Icon An icon appears when an error is detected. Detailed information about the error icons can be checked from the remote control menu in the configuration menu. Fig. 4-239 4-90 1/2019 MC285C-3...
Page 165: Receiver Components
Receiver Components Fig. 4-241 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. 1/2019 MC285C-3 4-91...
Page 166: Monitor Led
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. 4-92 1/2019 MC285C-3...
Page 167: Remote Control System Verifications
Damage to these items may cause internal component damage and/or electrical failure. 1/2019 MC285C-3 4-93...
Page 168: Checking Engine Start Operation
Operate the various operation levers and engine starts up. verify that the outriggers operate accordingly for the respective lever operations. Fig. 4-246 • Ground Set-Up: The outriggers are lowered to the ground. 4-94 1/2019 MC285C-3...
Page 169: Checking Crane Operation
Slew continuously through at least 360° and Move the operation lever (12) to “Raise” and verify that operations are normal. “Lower” side and check that the boom follows the lever operation. Fig. 4-248 Fig. 4-251 1/2019 MC285C-3 4-95...
Page 170: 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. 4-96 1/2019 MC285C-3...
Page 171: Powering On
Transmitter Power Switch once again with power to the remote control system turned Fig. 4-257 CAUTION: You must press the Transmitter Power Switch a total of three times to enable crane operations using the remote control system. 1/2019 MC285C-3 4-97...
Page 172: Switching Operation Mode
During outrigger operations, position the crane to the STOW position. WARNING! Tip Hazard. Do not operate the outriggers if the crane is not in the STOW position. Only operate the outrigger when the crane is in the STOW position. Fig. 4-261 4-98 1/2019 MC285C-3...
Page 173: Outrigger Setting
NOTICE: If the travel lever is not pushed in, the until the rubber tracks are approximately 80 interlock will engage and prevent outrigger mm above the ground. operations. Switch the operation mode selector switch to “Outrigger.” Fig. 4-266 1/2019 MC285C-3 4-99...
Page 174: Outrigger Stowage
To operate multiple outriggers, operate the corresponding operation levers simultaneously. 4-100 1/2019 MC285C-3...
Page 175: Crane Operation
“Neutral” position to stop unwinding the WARNING! Sudden Movement Hazard. Do not wire rope. operate the machine using the transmitter if the levers do not return to the NEUTRAL position freely. Levers must return to the 1/2019 MC285C-3 4-101...
Page 176: Boom Lifting/Lowering Operation
• Raising: Pull the lever toward you. Fig. 4-275 NOTICE: Adjust the boom extension and Fig. 4-274 retraction speed by moving the lever forward or NOTICE: Adjust the raising and lowering speed of backward. the boom by moving the lever forward or backward. 4-102 1/2019 MC285C-3...
Page 177: Slewing Operation
OFF the power to the transmitter. Fig. 4-276 NOTICE: Adjust the crane slew speed by moving the lever forward or backward. Micro Speed Mode Switch Operation Press the Micro Speed Switch to set or cancel Micro speed mode. 1/2019 MC285C-3 4-103...
Page 178: 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. 4-280 Horn Switch Operation The horn keeps blowing while this switch is pressed and held. Fig. 4-281 4-104 1/2019 MC285C-3...
Page 179: Led Light Operations
Remote Control System Power OFF Switch to turn off power. Fig. 4-285 The engine will shut down at the same time. Fig. 4-286 Turn the Starter Switch on the machine main unit to “OFF” to turn off power. 1/2019 MC285C-3 4-105...
Page 180: Inspection After Ending Remote Control System Operation
Turn OFF the power of the transmitter. Pressing the Emergency Engine Stop (EMO)/ Remote Control System Power OFF Switch will turn OFF the power. Fig. 4-288 2. Lift the battery upward while pushing it. The battery comes off. 4-106 1/2019 MC285C-3...
Page 181: Charging Method Of Battery
• Do not charge the battery in an explosion procedure described below. hazardous area under any circumstances. • Use the battery charger with correct voltage: 100 to 240 VAC, 10 to 30 VDC. • Do not use the battery charger outside the described temperature range. 1/2019 MC285C-3 4-107...
Page 182 • Lights in green: Charged • Blinks in green: Charging • Lights in red: Battery failure • Blinks in red: Cannot be charged due to a battery temperature: below 0°C or above 45°C. 4-108 1/2019 MC285C-3...
Page 183: Electric Motor (Option)
Pay close attention to hydraulic oil temperature during electric motor crane operation. The crane may need to be periodically shut down to allow the hydraulic oil to cool off. 1/2019 MC285C-3 4-109...
Page 184: Electric Motor Components
(i.e., as opposed to using the engine as the power source). For more information on switches and operation levers not described here, refer to "TRAVEL CONTROLS" on page 4-4. 4-110 1/2019 MC285C-3...
Page 185: Starter Switch
NOTICE: • Release the lever at the position corresponding to the motor speed required for the operation. The lever will remain at that position. • Another accelerator lever is provided on the crane control side. Fig. 4-295 1/2019 MC285C-3 4-111...
Page 186: Power Unit
Section 4 – ELECTRIC MOTOR COMPONENTS Mini-Crawler Crane M A E D A Power Unit Fig. 4-297 1 - Power Unit Cover 4 - Coupling 2 - Electric Unit Transport Casters 5 - Hydraulic Pump 3 - Electric Motor 4-112 1/2019 MC285C-3...
Page 187: Power Supply Box
1 - Power Supply Box 5 - Terminal Block 2 - Power Supply Box Door 6 - Ground Connection Terminal 3 - Door Handle 7 - Cable Inserting Hole 4 - Main Breaker Switch 8 - Power Plug 1/2019 MC285C-3 4-113...
Page 188: Main Breaker Switch
(2) is reset, contact us or our sales service agency to request inspection or Fig. 4-299 repair. 1 - Breaker 2 - Overvoltage/ground-fault indication button (yellow) 3 - Trip button (red) 4 - Ground-fault test button (gray) 4-114 1/2019 MC285C-3...
Page 189: Inverter Unit
This is the control unit for the electric unit. WARNING! Do not disassemble or modify the inverter unit. Note risk of unintended changes in the settings or control details that may lead in turn to failure or serious accidents involving the electric unit. Fig. 4-301 1/2019 MC285C-3 4-115...
Page 190: Ac Circuit Power Switch
Fig. 4-303 The Trouble Light is designed to indicate the presence of an error in the inverter unit. • ON: An error is detected in the inverter unit. • OFF: The inverter unit is in normal operation. 4-116 1/2019 MC285C-3...
Page 191: Connecting Power Supply Cable
(7) at the bottom of the power supply box protection. to connect it to the terminal block (5). • The ground wire of the cabtyre cable must be properly connected to the “PE terminal” terminal at lower left in the power supply box. 1/2019 MC285C-3 4-117...
Page 192: Operation And Inspection After Connecting Power Supply Cable
“START” position. Inverter unit and power unit during warm-up. If abnormal conditions are encountered, immediately turn the starter switch to the OFF position to bring the machine to a halt. 4-118 1/2019 MC285C-3...
Page 193: Machine Operation
(1) Turn the starter switch key to the “OFF” position. The electric motor comes to a stop. 1/2019 MC285C-3 4-119...
Page 194: Stopping Machine
NOTICE: Always return the cabtyre cable to its designated place after performing inspection and cleaning. Replace the cover (6) of the terminal block (5) to its original position and close the door (3) of the power supply box (2). 4-120 1/2019 MC285C-3...
Page 195: Installing And Removing The Electric Unit
CAUTION: The electric unit can be removed and reinstalled using the crane on the machine itself, but care is required to adjust Fig. 4-319 the hoisting attachments to ensure the hook does not hit the machine body. 1/2019 MC285C-3 4-121...
Page 196 Fig. 4-321 Remove the four retaining bolts (6) on the main unit frame lower cover (5)). Remove the cover (5). Fig. 4-325 Fig. 4-322 Detach the three hydraulic hoses (7) from the couplers. Fig. 4-326 Fig. 4-323 4-122 1/2019 MC285C-3...
Page 197: Reinstalling The Electric Unit
Fig. 4-329 crane to raise or lower the electric unit to adjust the hole positions carefully. For more information on bolt tightening torques, see “Standard Tightening Torque List” on page 5-11. 1/2019 MC285C-3 4-123...
Page 198: Searcher Hook Safety Precautions
Searcher hook position settings Actual machine position Selector switch Position display Stowing 4-124 1/2019 MC285C-3...
Page 199: 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 1/2019 MC285C-3 4-125...
Page 200: Searcher Hook Monitor
Fig.4-335 Searcher Hook Position Display The display will change depending on the Fig.4-336 searcher hook position setting. For more information on the position and display details, see “Moment Limiter Settings” on page 4-124. 4-126 1/2019 MC285C-3...
Page 201: User Mode
“User Mode” on page 4-13. 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 4-124. Fig.4-338 1/2019 MC285C-3 4-127...
Page 202: 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. 4-128 1/2019 MC285C-3...
Page 203 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.4-349 Fig.4-346 1/2019 MC285C-3 4-129...
Page 204 If it becomes necessary to raise the boom while automatically stopped, the boom can be raised only while the Boom Lift Fig.4-352 Bypass Switch is depressed. 4-130 1/2019 MC285C-3...
Page 205: Auxiliary Winch Safety Precautions
• Check that the safety devices such as the perform the operation by having bigger moment limiter, outrigger safety device, and margin to crane capacity than above ground over winding detector / automatic stop lifting work. device activate properly. 1/2019 MC285C-3 4-131...
Page 206: Auxiliary Winch Components (Option)
10 - Rubber Rope for Stowage 4 - Idler Bracket 11 - Hoist Down Stop Harness 5 - Boom Head 12 - Winch Select Valve 6 - Bullet Connector 13 - Boom 7 - Over Winding Detector (Auxiliary Winch) 4-132 1/2019 MC285C-3...
Page 207: Auxiliary Winch Monitor
For more information on indications and switch operations not described in this section, see “Home Screen” on page 4-10. Auxiliary Winch Display The display will change depending on the auxiliary winch setting. Fig.4-355 1/2019 MC285C-3 4-133...
Page 208: User Mode
For more information on indications and switch operations not described in this section, see “User Mode” on page 4-13. Hook Hanging Number Selection/Auxiliary Winch Selection Advice Used when switching to the auxiliary winch setting. Fig.4-357 4-134 1/2019 MC285C-3...
Page 209: Auxiliary Winch - How To Install And Detach Boom Head
If over un-winding detector does not work properly, it may cause wire rope to fall off, which can result in a serious accident. 1/2019 MC285C-3 4-135...
Page 210 Insert position pin (7) to the aligned holes, and secure it with lynch pin (8). DANGER! Position pin must be secured with lynch pin. If position pin comes off during work, it may cause a serious accident. 4-136 1/2019 MC285C-3...
Page 211 4-136 and fix the wedge socket (16) to the wire rope. Fig. 4-366 8. Shift the manual shift valve (17) from regular side to auxiliary winch side. Fig. 4-369 Fig. 4-367 NOTICE: If valve is not shifted, main winch activates causing random winding. 1/2019 MC285C-3 4-137...
Page 212 17. Keep wire rope at tension and operate hook raising (pull winch lever) to wind wire rope on 13. Connect the length sensor bullet connector auxiliary winch unit. (29) to bullet connector (relay harness) (31) on boom head side. Fig. 4-372 4-138 1/2019 MC285C-3...
Page 213: Detaching Boom Head
See “Crane Stowing Operation” on page 4-61 to stow the crane. Stow the hook block in the specified position. Fig. 4-375 See “OUTRIGGER STOWING” on page 4-48 Secure the winded wire rope with stowage to stow the outriggers. rubber band (3). Fig. 4-376 1/2019 MC285C-3 4-139...
Page 214: Trailering
4-24. 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. 4-140 1/2019 MC285C-3...
Page 215: Ramp Planks
Place wheel blocks under the wheels of the trailer to secure the trailer. Fig. 4-380 Fig. 4-378 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. 1/2019 MC285C-3 4-141...
Page 216: Hoisting
2160 kg. cylinder (3), or there is no play at the hook Recommended Hoisting hanger (4). Attachments • Shackle: BC or SC, nominal 14 4-142 1/2019 MC285C-3...
Page 217: Maintenance And Inspection
Section 5 MAINTENANCE AND INSPECTION 1/2019 MC285C-3...
Page 218: General Maintenance Information And Precautions
Exhaust Parts Always use Maeda genuine parts as specified in WARNING! Exposure Hazard. Engine exhaust emissions contain carbon monoxide. the parts catalogue. Prolonged exposure to carbon monoxide will Cleaning Parts cause brain damage or death.
Page 219: Protective Clothing And Gear
Exercise caution when handling handling extremely hot or cold equipment electrical parts. and fluids. Only Maeda-approved optional electrical parts • DO NOT wear watches, rings or jewelry while may be installed. working with electrical and mechanical equipment.
Page 220: Handling And Service Of Engine Oil And Filters
• Unpack a replacement oil filter immediately filter. before use. • Wait until the engine is cool to the touch to • Always use Maeda genuine oil filters. replace the oil or filter. Storage of oil: WARNING! Burn Hazard. Secure the oil level •...
Page 221: Handling And Service Of Engine Diesel Fuel
• Wait until the engine is cool to the touch to immediately before use. replace the filter. • Always use Maeda genuine water separators. WARNING! Exposure Hazard. Avoid skin Storage of fuel: contact with fuel. If your skin is penetrated by •...
Page 222: Handling And Service Of Engine Coolant
Check the ratio of the coolant frequently using a coolant tester. The mixing proportion of coolant varies with outside air temperature. See “Clean Engine Cooling System” on page 5-44. A low coolant level may cause overheating and corrosion attributed to aeration. 1/2019 MC285C-3...
Page 223: Handling And Service Of Hydraulic Oil And Filters
WARNING! The following safety messages • Always use Maeda genuine hydraulic oil filters. address a potential Burn Hazard: • Relieve internal pressure by slowly rotating the hydraulic tank filler cap during removal.
Page 224: Blocking Machine For Maintenance
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 1/2019 MC285C-3...
Page 225: Legal Inspection
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 226: Lubricating Oil
• Always refer to the engine operation manual for the correct oil specifications. Lubricating oil usage varies with ambient • Only use Maeda abrasion-resistant hydraulic oil temperature changes. ISO VG46 and VG32 or Nippon Oil Super • Oil quantity is defined as the total quantity of oil Highland 32.
Page 227: Special Tools And Standard Tightening Torque
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 1/2019 MC285C-3 5-11...
Page 228 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 5-12 1/2019 MC285C-3...
Page 229: 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 1/2019 MC285C-3 5-13...
Page 230: Machinery Cover
“Removing Machinery Cover” on page 5-14. 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. 5-14 1/2019 MC285C-3...
Page 231: Fuses
• Always use a fuse of the same type and capacity when replacing. Fig. 5-7 Capacity Circuit name Override Spare Working Status Lamp 0.85sq Glow 0.85sq Engine startup Lower controller/Monitor 0.3sq power supply Remote control system/ 0.3sq Lower power supply Upper controller power 0.3sq supply 0.3sq Starter Switch 1/2019 MC285C-3 5-15...
Page 232: Inspection
See “Removal of Rubber Tracks” on page 5-59. Replace Winch Wire Rope See “Winch Wire Rope - Removal” on page 5-65. Check Wire Rope - Boom Telescope Extension See “Wire Rope - Boom Telescope Extension” on page 5-68. 5-16 1/2019 MC285C-3...
Page 233: Pre-Start Visible Checks
(12) Winch Motor - See “Winch Motor” on page 5-18. (13) Winch Drum - See “Winch Drum” on page 5-18. (14) Hook Block - See “Hook Block” on page 5-18. (15) Operation Levers - See “Operation Levers” on page 5-18. 1/2019 MC285C-3 5-17...
Page 234: Engine
Repair any abnormality detected. Derrick Cylinder Check for loose pipe connections, oil leakage, wear or damage of support pins etc., and repair as necessary. 5-18 1/2019 MC285C-3...
Page 235: Pre-Start Inspection
See “Installing Machinery Cover” on page If the coolant level is lower than the “LOW” 5-14 and install the machinery cover. level, use the following procedure to refill coolant. See “Removing Machinery Cover” on page 5-14 and remove the machinery cover. 1/2019 MC285C-3 5-19...
Page 236: Check / Add Engine Oil
Insert the oil level gauge (G) into the oil filler and pull it out. If the oil level is between the H mark and L mark on the oil level gauge, the oil level is normal. Fig. 5-13 5-20 1/2019 MC285C-3...
Page 237: Check / Add Fuel
(2) in the pot has not come up from the bottom. The red float coming up indicates that the water has mixed in. Fig. 5-15 Fig. 5-17 1/2019 MC285C-3 5-21...
Page 238: Check Fuel Filter Pot
Insert the fuel filter (2) into the holder (1) to secure it. NOTICE: After inserting the fuel filter into the holder, lightly shake the fuel filter to check that it is firmly secured. 5-22 1/2019 MC285C-3...
Page 239: Check / Add Hydraulic Oil
See “OUTRIGGER SETTING” on page 4-38. 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. 5-22 Fig. 5-23 1/2019 MC285C-3 5-23...
Page 240: Check / Add Slewing Motor Reduction Gearcase Oil
If the horn does not sound, the horn See “Installing Machinery Cover” on page may be faulty or the circuit may be open. 5-14 and install the machinery cover. Repair or replace the horn. Fig. 5-28 5-24 1/2019 MC285C-3...
Page 241: Check Working Light Operation
For the check and inspections in open, well-ventilated areas. inspection of wire rope while winch and boom WARNING! Equipment Hazard. Always repair telescoping, See “Wire Rope” on page 5-63. parts or systems before operating the machine as needed. 1/2019 MC285C-3 5-25...
Page 242: Check / Adjust Rubber Track Tension
Fig. 5-34 Confirm that none of the outriggers moves even when operated in outrigger mode. Fig. 5-32 Set the outriggers to maximum extension. Start the engine to extend the outriggers. 5-26 1/2019 MC285C-3...
Page 243: Check Outrigger Operation
See “Starting the Engine” on page 4-20 and start the engine. 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. 5-37 Fig. 5-38 1/2019 MC285C-3 5-27...
Page 244: Check Crane Operation
13. Verify the crane slews smoothly clockwise EXTEND (push forward). (right) when the slewing lever is moved to Clockwise (right) (pull toward you). 14. Check for any abnormal sounds emitted from the post. Repair as necessary before continuing operation. Fig. 5-41 5-28 1/2019 MC285C-3...
Page 245: Check Over Winding Detector Operation
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. 1/2019 MC285C-3 5-29...
Page 246: Check Emergency Engine Stop Switch (Emo)
The engine does not start when it is “ON”. Fig. 5-46 Verify the engine exhaust gas color is either transparent or slightly blue. Check for abnormal noises and vibrations. Repair as necessary before continuing operation. Fig. 5-45 5-30 1/2019 MC285C-3...
Page 247 Check/Clean air cleaner element Engine Air Cleaner Replace air cleaner element Electrical Check alternator and starter Engine Inspect/Adjust engine valve Valves clearance Cooling Clean engine cooling system Refer to the engine operation manual for details on engine. 1/2019 MC285C-3 5-31...
Page 248: Periodic Maintenance
5-39. replacement date. • Replace Engine Oil Filter Cartridge - See • Always use Maeda genuine elements. “Replace Engine Oil Filter Cartridge” on page See “Removing Machinery Cover” on page 5-40.
Page 249 Shine a light bulb into the element after cleaning for check. If check finds a pore or thinned part, replace the element. Fig. 5-53 11. See “Installing Machinery Cover” on page 5-14 and install the machinery cover. Fig. 5-50 1/2019 MC285C-3 5-33...
Page 250: Drain Contaminant Water / Deposits In Fuel Tank
After draining the fuel, install and tighten the Greasing of the Lithium 4 places outrigger top drain plug securely. grease box pin See "OUTRIGGER STOWING" on page 4-48 to stow the outriggers. 5-34 1/2019 MC285C-3...
Page 251 Apply red rope grease to prevent wire rope abrasion and rust formation. With the rope surface cleaned, grease the rope with a brush. 1/2019 MC285C-3 5-35...
Page 252 Section 5 – PERIODIC MAINTENANCE Mini-Crawler Crane M A E D A Fig. 5-55 5-36 1/2019 MC285C-3...
Page 253: Check Oil Level And Refill Oil In Winch Reduction Gearcase
Fig. 5-58 be seen. Slowly turn the winch and stop it at a position where the oil inspection plug (G) is visible through the inspection hole (A) on the post side. Fig. 5-56 1/2019 MC285C-3 5-37...
Page 254: Check / Adjust Alternator Belt Tension
NOTE: Pour in the gear oil until the oil comes out Fig. 5-60 of the oil inspection plug hole. Securely tighten the oil inspection plug after checking/refilling the oil. Fig. 5-61 5-38 1/2019 MC285C-3...
Page 255: Replace Engine Oil
• Volume of oil actually to be replaced in the oil pan: 1.85 L Place the machine on a level surface. See “OUTRIGGER SETTING” on page 4-38 to set outriggers and raise the machine about Fig. 5-65 80 mm above the ground. 1/2019 MC285C-3 5-39...
Page 256: Replace Engine Oil Filter Cartridge
80 mm. Always place timbers beneath right and left crawlers and ground for safety. WARNING! Securely tighten the oil level gauge after checking/refilling the oil. Fig. 5-67 If the oil level gauge falls during the operation, 5-40 1/2019 MC285C-3...
Page 257: Replace Fuel Filter
11. After replacing the filter cartridge (3), feed engine oil through filler port (F) to the specified level. 12. Pull the oil level gauge (G) out and wipe the oil with a disposable cloth. 1/2019 MC285C-3 5-41...
Page 258: Replace Hydraulic Oil Return Filter
5-14 and install the machinery cover. Place the machine on a level surface. See “TRAVELLING POSITION” on page 4-24 and put the machine in the “Travelling posture”. See “Removing Machinery Cover” on page 5-14 and remove the machinery cover. 5-42 1/2019 MC285C-3...
Page 259 10. After refilling the oil, set the filler cap and tighten the mounting bolts (4 bolts) securely. NOTE: Wipe away cleanly whenever the oil spills. 11. See “Installing Machinery Cover” on page 5-14 and install the machinery cover. 1/2019 MC285C-3 5-43...
Page 260: Replace Air Cleaner Element
• If the air cleaner element is damaged, replace with a new one before the scheduled replacement date. • Always use Maeda genuine elements. See “Removing Machinery Cover” on page 5-14 and remove the machinery cover. Disengage the two clamps (1) and remove the dust pan (2).
Page 261 5-14 and remove the machinery cover. connected to the radiator supply port properly during cleaning with running water. After cleaning, stop the engine and water supply and drain tap water. Close the drain valve (4) upon completion of draining. 1/2019 MC285C-3 5-45...
Page 262 Install the cap (2) properly. NOTICE: 19. See “Installing Machinery Cover” on page See the above-mentioned table, “Mixing ratio 5-14 and install the machinery cover. between water and antifreeze”, for the mixing ratio of antifreeze and tap water. 5-46 1/2019 MC285C-3...
Page 263: Replace Oil In Hydraulic Oil Tank
10. After refilling the oil, set the filler cap and 5-14 and remove the machinery cover. tighten the mounting bolts (4 bolts) securely. 11. See “Installing Machinery Cover” on page 5-14 and install the machinery cover. 12. Bleed the air according to the following sequence. 1/2019 MC285C-3 5-47...
Page 264: Replace Oil In Slewing Reduction Gearcase
Install a drain plug. See "OUTRIGGER STOWING" on page 4-48 to stow the outriggers. See “Removing Machinery Cover” on page 5-14 and remove the machinery cover. 5-48 1/2019 MC285C-3...
Page 265: Replace Oil In Winch Reduction Gearcase
Remove the inspection cover (1) by 10. Securely tighten the filler plug after changing unscrewing the mounting bolts (2) (4 bolts). the oil. 11. See “Installing Machinery Cover” on page 5-14 and install the machinery cover. Fig. 5-87 1/2019 MC285C-3 5-49...
Page 266 With the Allen key (C), turn and remove the oil inspection plug (G). Gear oil in the reduction gearcase is drained. Fig. 5-90 After gear oil in the reduction gearcase is completely drained, detach the elbow, and reinstall the drain plug and securely tighten it. 5-50 1/2019 MC285C-3...
Page 267: 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. 1/2019 MC285C-3 5-51...
Page 268: General Machine Maintenance
NEVER allow battery fluid to come in contact with clothing, skin or eyes. ALWAYS wear safety goggles and protective clothing when handling or servicing the battery. If contact with the skin and/or eyes should occur, seek immediate 5-52 1/2019 MC285C-3...
Page 269: Remove / Install Battery
Place the machine on a level location. See “Removing Machinery Cover” on page 5-14 and remove the machinery cover. Check the electrolyte level through the side of the battery case. Verify the electrolyte is at the upper level line (1). 1/2019 MC285C-3 5-53...
Page 270 • The battery should not be charged quickly after being discharged. Measure the specific gravity of the battery fluid in advance and charge the battery slowly as needed. 5-54 1/2019 MC285C-3...
Page 271: Battery Charging
Before connecting, verify the cable and clamps are not corroded or damaged. Replace as needed. Verify connection polarity before connecting the cables. Fig. 5-101 Turn the Starter Switch of both the working machine and the failed machine to OFF. 1/2019 MC285C-3 5-55...
Page 272: Fuses
START position to start the engine. If See “FUSES” on page 5-15 for more information the engine does not start, wait a minimum of on fuse locations. 2 minutes before restarting. See “STARTING” on page 4-20. 5-56 1/2019 MC285C-3...
Page 273: Rubber Tracks
Remove and clean any oil and Avoid operating with the edge of the rubber tracks chemical solvents immediately. Do not travel over against concrete or walls. road surfaces covered in oil. Fig. 5-109 Fig. 5-106 1/2019 MC285C-3 5-57...
Page 274 • 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. 5-115 Fig. 5-112 5-58 1/2019 MC285C-3...
Page 275: Inspection Of Rubber Tracks
• 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. 5-118 1/2019 MC285C-3 5-59...
Page 276: Installation Of Rubber Tracks
See “Checking Rubber Track Tension” on remove it. page 5-61 and “Adjusting Rubber Track Tension” on page 5-61. Stow the outriggers and lower the machine to the ground. See "OUTRIGGER STOWING" on page 4-48. 5-60 1/2019 MC285C-3...
Page 277: Checking Rubber Track Tension
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. 5-131 Fig. 5-129 1/2019 MC285C-3 5-61...
Page 278 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 4-48. b. Move the machine back and forth. 5-62 1/2019 MC285C-3...
Page 279: Wire Rope
Fig. 5-135 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 280: Measuring Wire Rope
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 engine. 5-64 1/2019 MC285C-3...
Page 281: Winch Wire Rope - Removal
• Do not kink the rope when winding up. Fig. 5-141 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. 1/2019 MC285C-3 5-65...
Page 282 Adjust the length of the wire rope to keep the end of the wire Fig. 5-148 rope from protruding from the narrow hole in the winch drum. Fig. 5-145 5-66 1/2019 MC285C-3...
Page 283 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. 5-151 1/2019 MC285C-3 5-67...
Page 284: 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 5-69. Fig. 5-153 5-68 1/2019 MC285C-3...
Page 285: Boom Telescope Wire Rope Adjustment
• 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. 1/2019 MC285C-3 5-69...
Page 286 (14) for the no. 5 boom pull-in wire rope (7) further by one more turn. Fig. 5-158 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). 5-70 1/2019 MC285C-3...
Page 287: Storage
Before Storage Place the machine in the travelling position during long-term storage to protect the cylinder rods. (Cylinder rod corrosion prevention) See “TRAVELLING POSITION” on page 4-24. Fig. 5-162 1/2019 MC285C-3 5-71...
Page 288: After Storage
• Cover the battery or remove the battery from the machine and keep it in a warm place. • If the battery electrolyte level is low, refill with distilled water just before use. Do not refill after operation, as the water will freeze in the battery. 5-72 1/2019 MC285C-3...
Page 289: 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 290: Inspection And Maintenance List
Installation Check of Position Pin and Lynch Pin See “Position Pin and Lynch Pin” on page 5-75. Post-Start – After Starting Engine Check Moment Limiter for Operation See “Moment Limiter for Operation (Searcher Hook (Searcher Hook Mode) Mode)” on page 5-76. 5-74 1/2019 MC285C-3...
Page 291: Pre-Start - Before Starting Engine
Fig. 5-163 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. 5-164 1/2019 MC285C-3 5-75...
Page 292: Pre-Start - After Starting Engine
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. 5-76 1/2019 MC285C-3...
Page 293: Auxiliary Winch Inspection And Maintenance
MAINTENANCE limits. Replace consumables regularly, which will produce economical use of this machine. Always Legal Inspection replace with a Maeda genuine item. Check parts Verify that all safety devices are operating catalogue for correct part number for parts properly. request.
Page 294: Inspection And Maintenance List
See “Over-Unwinding Stop Device” on page 5-79. Check Moment Limiter for Operation See “Moment Limiter for Operation (Auxiliary Winch (Searcher Hook Mode) Mode)” on page 5-80. As Required Replace Winch Wire Rope See "Winch Wire Rope - Removal" on page 5-80. 5-78 1/2019 MC285C-3...
Page 295: Pre-Start - Before Starting Engine
Over-Unwinding Stop Device may have failure or Check the drum for cracks, bending or damage may have cut wiring. and repair it as necessary. Check hoisting wire Contact us or our sales service agency. rope for disorderly winding and repair it as necessary. 1/2019 MC285C-3 5-79...
Page 296: Moment Limiter For Operation (Auxiliary Winch Mode)
4 to 6 mm ready and apply it to auto-stopped in overloaded condition, stop rope wedge (7). using the machine, and contact us or our • Lightly tap round bar with hammer in the agency. direction of the arrow (a) to remove the rope wedge. 5-80 1/2019 MC285C-3...
Page 297: Winch Wire Rope - Installation
Always unwind by the rope by pulling it off winch drum. the winch drum. Slowly move the winch lever to the UP position (pull it toward you) to wind up the wire rope in the winch drum. 1/2019 MC285C-3 5-81...
Page 298 NOTICE: Do not let hook block to touch the ground. With the wire rope held under tension, place the winch lever in the UP position (pull it toward you) to wind up the wire rope in the winch drum. 5-82 1/2019 MC285C-3...
Page 299: Auxiliary Winch Periodic Maintenance
2 places the hook Lithium grease (1), (2) block Greasing of 1 piece the winch Rope oil wire rope With the use of the grease gun, grease the grease plugs. Wipe off old grease squeezed out after greasing. 1/2019 MC285C-3 5-83...
Page 300: Check Oil Level And Refill Oil In Winch Reduction Gearcase
See "OUTRIGGER STOWING" on page 4-48 Rotate the winch slowly until the oil inspection to stow the outriggers. plug (G) reaches a point where it can be seen through the post side inspection hole (A). Fig. 5-176 5-84 1/2019 MC285C-3...
Page 301: Replace Oil In Winch Reduction Gearcase
(2) Stop the winch at a point where the drain Fig. 5-182 plug (P) of the winch reduction gearcase NOTICE: Pump the gear oil until it exudes from can be seen above the inspection hole (B). the oil inspection plug. 1/2019 MC285C-3 5-85...
Page 302 NOTICE: • Perform a proper break-in with no object hoisted for 5 minutes after oil replacement. • Wipe off the oil completely if spilled. 11. See "OUTRIGGER STOWING" on page 4-48 to stow the “outrigger [4]”. 5-86 1/2019 MC285C-3...
Page 303: 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 1/2019 MC285C-3 5-87...
Page 304: Engine
Insufficient engine oil “Check / Add Engine Oil” on page 5-20. Engine oil pressure monitor turns on during operation See engine operation manual to Engine oil filter clogged change engine oil filter. Engine failure *Check and repair. 5-88 1/2019 MC285C-3...
Page 305: Electrical Components
Charge the battery. Detection abnormality due Operate the slewing operation to boom swaying lever left and right. A “slew detection abnormality” warning Defective wiring *Check and repair. appears on the monitor. Improper limit switch *Adjust or replace. adjustment 1/2019 MC285C-3 5-89...
Page 306: 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. 5-90 1/2019 MC285C-3...
Page 307: Electric Motor
Perform inspection, cleaning and repair of Improperly ventilated electric motor. The electric unit rises in temperature during operation Replace the cabtyre cable with one Considerable voltage drop adhering to specifications. Overload Reduce loads. High number of starts Reduce the number of starts. 1/2019 MC285C-3 5-91...
Page 308 Section 5 – TROUBLESHOOTING Mini-Crawler Crane M A E D A Problem Major Cause(s) Actions The trouble light (red) of the Failure in the inverter unit *Inspect, repair, replace. inverter unit comes on *Inspect, repair, replace. Trips Battery deterioration 5-92 1/2019 MC285C-3...
Page 309: Error Codes
Engine stop relay Short circuit EO12L －－ ★ Emergency stop valve Disconnected EO12H －－ ★ Emergency stop valve Short circuit EO13L －－ ★ Low pressure valve Disconnected EO13H －－ ★ Low pressure valve Short circuit 1/2019 MC285C-3 5-93...
Page 310 Right slew detector abnormality － ● ☆ SE02-2 Left slew detector abnormality － ● ☆ LSIN01 Slewing lever detection abnormality － ● ☆ LSIN02 Hoisting lever detection abnormality － ● ☆ Raising/lowering lever detection LSIN03 － ● ☆ abnormality 5-94 1/2019 MC285C-3...
Page 311: Slewing Position Calibration
Fig. 5-184 (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. 1/2019 MC285C-3 5-95...
Page 312 Section 5 – TROUBLESHOOTING Mini-Crawler Crane M A E D A This Page Intentionally Left Blank 5-96 1/2019 MC285C-3...
Page 313 MAEDA MINI-CRAWLER CRANE MC285C-3 OPERATION MANUAL Document No: 102ME-OM1901-00 First edition: Jan. 12, 2019 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 MC285C-3 Operation Manual

Section 1 INTRODUCTION

Section 2 SAFETY

Specifications, Terminology and Capacity Charts

Section 4 OPERATION

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Summary of Contents for Maeda MC285C-3