Maeda MC285C-3 User manual

Operation Manual
Mini-Crawler Crane
102ME-OM1901-00

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.

Mini-Crawler Crane M A E D A Table of Contents
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Table of Contents
Section 1 INTRODUCTION
INTRODUCTION................................................................................................................1-2
Section 2 SAFETY
SAFETY DEFINITIONS .....................................................................................................2-2
SAFETY PRECAUTIONS..................................................................................................2-2
SAFETY LABEL LOCATIONS ...........................................................................................2-9
Machine Body...........................................................................................................2-9
Electric Motor (Option)............................................................................................2-21
Searcher Hook (Option)..........................................................................................2-23
Auxiliary Winch (Option).........................................................................................2-26
Section 3 SPECIFICATIONS, TERMINOLOGY AND
CAPACITY CHARTS
MACHINE FEATURES ......................................................................................................3-2
Main Features ..........................................................................................................3-2
Travelling Dolly....................................................................................................3-2
Crane...................................................................................................................3-2
Safety Devices.....................................................................................................3-2
CRANE TERMINOLOGY...................................................................................................3-3
Terms and Definitions...............................................................................................3-3
PRINCIPLE SPECIFICATIONS LIST.................................................................................3-4
Standard and Electric Motor Option Specifications ..................................................3-4
Remote Control System Specifications ....................................................................3-6
Searcher Hook Specifications ..................................................................................3-7
Auxiliary Winch Specifications..................................................................................3-8
DIMENSIONAL DRAWINGS..............................................................................................3-9
Machine Dimensional Drawing–Standard.................................................................3-9
Machine Dimensional Drawing–Electric Motor Option..............................................3-9
Searcher Hook Dimensional Drawing-Standard.....................................................3-10
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

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Boom Length..........................................................................................................3-14
Rated Total Load Chart for Standard Specification................................................3-16
Rated Total Load Chart–4 Falls..............................................................................3-16
Rated Total Load Chart–2 Falls..............................................................................3-17
Rated Total Load Chart–Single Fall........................................................................3-17
Rated Total Load Chart for Searcher Hook............................................................3-18
Rated Total Load Chart for Searcher Hook-SH1....................................................3-19
Rated Total Load Chart for Searcher Hook-SH2....................................................3-20
Rated Total Load Chart for Searcher Hook-SH3....................................................3-21
Rated Total Load Chart for Auxiliary Winch............................................................3-22
WORKING RADIUS/LIFTING HEIGHT............................................................................3-23
Standard.................................................................................................................3-23
Working Radius/Lifting Height for Searcher Hook ..................................................3-25
Working Radius/Lifting Height for Auxiliary Winch..................................................3-28
Section 4 OPERATION
MACHINE COMPONENTS................................................................................................4-2
TRAVEL CONTROLS........................................................................................................4-4
Control Location .......................................................................................................4-4
Switches...................................................................................................................4-5
Accelerator Lever ................................................................................................4-5
L. H. Travel Lever/Locking lever..........................................................................4-5
R. H. Travel Lever/Locking lever .........................................................................4-5
Starter Switch......................................................................................................4-5
Horn Switch.........................................................................................................4-6
13BWorking Light Switch...........................................................................................4-6
Preheat Lamp......................................................................................................4-6
CRANE AND BOOM CONTROLS.....................................................................................4-7
Control Location .......................................................................................................4-7
Controls....................................................................................................................4-8
Accelerator lever..................................................................................................4-8
Slewing Lever......................................................................................................4-8
Boom Telescoping Lever.....................................................................................4-8
Winch Lever.........................................................................................................4-8
Boom Lift Lever ...................................................................................................4-8
Emergency Engine Stop Switch (EMO)...............................................................4-8
Horn Switch.........................................................................................................4-8
Engine Start/Stop Switch.....................................................................................4-8
MONITOR..........................................................................................................................4-9
16BStarting Screen.........................................................................................................4-9
17BHome Screen .........................................................................................................4-10
18BOutrigger Mode Switch......................................................................................4-11
19BUser Mode Switch .............................................................................................4-11
20BHook Stowage/Boom Stowage Switch...............................................................4-11
Boom Lift Bypass Switch...................................................................................4-11
Level Gauge......................................................................................................4-11

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Time Display......................................................................................................4-12
24BHour Meter Display............................................................................................4-12
BFuel Gauge........................................................................................................4-12
26BEngine/Electric Motor Drive Display ..................................................................4-12
27BRemote Control System Connection Display.....................................................4-12
28BOutrigger Status Display....................................................................................4-12
29BMoment Limiter Status Display..........................................................................4-12
30BWarning Display ................................................................................................4-12
Normal/Multi Outrigger State Display.................................................................4-12
31B41BUser Mode..............................................................................................................4-13
42BNumber of Falls Change....................................................................................4-14
43B44BError History Display..........................................................................................4-14
Consumables Display........................................................................................4-14
Monitor Brightness Adjustment..........................................................................4-15
Time Setting ......................................................................................................4-15
Language Change.............................................................................................4-15
52BSwitch Tone ON/OFF Change...........................................................................4-16
Software Version Check....................................................................................4-16
Remote Control System Accelerator Switch......................................................4-16
54BHome Switch .....................................................................................................4-16
55BDisplay Page Change........................................................................................4-16
56BWarning Display .....................................................................................................4-17
57BConsumables Display........................................................................................4-18
58BAbnormality Display...........................................................................................4-18
62BEngine Oil Pressure Abnormality.......................................................................4-18
63BEngine Coolant Temperature Abnormality.........................................................4-18
64BCharge Capacity Abnormality............................................................................4-18
65BError Code Display ............................................................................................4-18
Slew Position Abnormality.................................................................................4-18
Slew Detection Abnormality...............................................................................4-18
COLD WEATHER OPERATION......................................................................................4-19
STARTING.......................................................................................................................4-20
Starting the Engine.................................................................................................4-20
59BNormal Engine Start ..........................................................................................4-20
60BNormal Engine Start in Cold Weather................................................................4-21
Starting the Engine with the Engine Start/Stop Switch...........................................4-21
WARM-UP .......................................................................................................................4-22
STOPPING ......................................................................................................................4-24
Normal Stopping.....................................................................................................4-24
Emergency Stopping..............................................................................................4-24
61BEmergency 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

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Left Turn............................................................................................................4-27
Right Turn..........................................................................................................4-27
Spin Turns.........................................................................................................4-28
Left Spin Turn....................................................................................................4-28
Right Spin Turn..................................................................................................4-28
Left Turn Forward..............................................................................................4-28
Left Turn in Reverse..........................................................................................4-28
PARKING.........................................................................................................................4-29
OUTRIGGER SAFETY DEVICES....................................................................................4-30
Safety Device Activation Warnings.........................................................................4-30
Before Setting Outriggers..................................................................................4-30
Outrigger Setting ...............................................................................................4-30
Before Stowing Outriggers.................................................................................4-31
Outrigger Stowing..............................................................................................4-31
OUTRIGGER COMPONENTS.........................................................................................4-32
OUTRIGGER INDICATORS ............................................................................................4-33
Outrigger Ground Set-Up Lights 1 to 4..............................................................4-34
Outrigger Angle Setting Lights 1 to 4.................................................................4-34
Boom Stowing Light...........................................................................................4-35
Outrigger Un-set Warning (Working Status Lamp: red).....................................4-35
Outrigger Mode ......................................................................................................4-36
32BOutrigger 1 to 4 Stowage Switches ...................................................................4-37
33BOutrigger 1 to 4 Ground Set-Up Switches .........................................................4-37
34BOutrigger 1 and 4 / 2 and 3 Stowage Switches..................................................4-37
35BOutrigger 1 and 4 / 2 and 3 Ground Set-Up Switches........................................4-37
36BOutrigger Combined Stowage Switch................................................................4-37
37BOutrigger Combined Ground Set-Up Switch......................................................4-37
Outrigger Operation Lamp.................................................................................4-38
39BHome Switch .....................................................................................................4-38
Display Page Change........................................................................................4-38
OUTRIGGER SETTING...................................................................................................4-38
Support Plates........................................................................................................4-38
Setting Outriggers (Normal Outrigger State) ..........................................................4-39
Performed with Engine Off.................................................................................4-39
Performed with Engine On.................................................................................4-41
Setting Outriggers (Multi Outrigger State) ..............................................................4-42
OUTRIGGER SETTING MODES.....................................................................................4-43
"MAX" Outrigger Position .......................................................................................4-43
"Other than MAX" Outrigger Position......................................................................4-44
Crane Operation Prohibited Zones Due to Outrigger Rotary Angle........................4-45
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

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Operation in Emergencies......................................................................................4-50
CRANE SAFETY DEVICES.............................................................................................4-51
Interlock Characteristics.........................................................................................4-52
Crane Operations...................................................................................................4-53
Crane Stowing Operations .....................................................................................4-53
CRANE OPERATION ......................................................................................................4-54
Before Crane Operation .........................................................................................4-56
Crane Operation Position.......................................................................................4-57
Accelerator Lever Operation...................................................................................4-57
Hook Raising / Lowering Operation........................................................................4-57
Hook Raising / Lowering Procedure ..................................................................4-59
Boom Lifting Operation...........................................................................................4-59
Safety Precautions ............................................................................................4-59
Boom Lifting / Lowering Procedure....................................................................4-59
Boom Telescoping Operation.................................................................................4-59
Safety Precautions ............................................................................................4-59
Boom Telescoping Procedure ...........................................................................4-60
Slewing Operation..................................................................................................4-60
Safety Precautions ............................................................................................4-60
Slewing Procedure ............................................................................................4-61
Crane Stowing Operation.......................................................................................4-61
Safety Precautions ............................................................................................4-61
Stowing Procedure ............................................................................................4-61
MOMENT LIMITER (OVERLOAD DETECTOR)..............................................................4-63
Moment Limiter Features........................................................................................4-63
Programmable Moment Limiter..............................................................................4-64
During Setup......................................................................................................4-64
Moment Limiter Operation......................................................................................4-65
Overload Alarm..................................................................................................4-65
Working Range Limits Device............................................................................4-66
Over Winding Detector ......................................................................................4-66
Over-Unwinding Stop Device.............................................................................4-66
Number of Falls Change....................................................................................4-67
Outrigger Extension Detection...........................................................................4-67
Moment Limiter Error Display............................................................................4-67
Prohibited Actions after Auto-Stop .........................................................................4-68
Recovery Operation after Auto-Stop.......................................................................4-68
Moment Limiter Display..........................................................................................4-70
Load Factor Display...........................................................................................4-71
Actual Load Display...........................................................................................4-71
Rated Total Load Display ..................................................................................4-71
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

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Over Winding Display........................................................................................4-73
Over-Unwinding Stop Display............................................................................4-73
Lifting Height Upper Limit Switch, Lifting Height Upper Limit Display, Boom
Angle Upper Limit/Lower Limit Switch, Boom Angle Upper Limit/Lower Limit
Switch, Working Radius Upper Limit Display, Working Radius Upper Limit
Switch, Slewing Angle Limit Switch, Clockwise (Right) Slewing Angle Limit
Display, Counterclockwise (Left) Slewing Angle Limit Display...........................4-73
Setting Check/Cancelling Switch.......................................................................4-73
Over Winding Detector...........................................................................................4-74
Moment Limiter Working Envelope Setting.............................................................4-74
Setting or Cancelling the Upper Limit Value of Lifting Height ............................4-75
Setting or Cancelling the Boom Angle Upper Limit Value/Lower Limit Value ....4-75
Setting or Cancelling the Upper Limit Value of the Working Radius..................4-76
Setting/Resetting Slewing Angle Limits .............................................................4-76
Moment Limiter Override Switch ............................................................................4-77
REMOTE CONTROL SYSTEM INTRODUCTION...........................................................4-78
General...................................................................................................................4-78
Modification .......................................................................................................4-78
Holding ..............................................................................................................4-78
Washing.............................................................................................................4-78
Foreign Objects.................................................................................................4-79
Avoid Impact......................................................................................................4-79
Cold Weather.....................................................................................................4-79
Operation Environment......................................................................................4-80
Battery...............................................................................................................4-80
Temporary Storage when Abnormality is Found................................................
4-80
Cautions during Welding Repair........................................................................4-80
Operation Precautions............................................................................................4-81
Pre-Start Inspection...........................................................................................4-81
Engine Starting..................................................................................................4-81
Before Turning On Transmitter..........................................................................4-81
After Turning On Transmitter.............................................................................4-81
After Starting Engine..........................................................................................4-81
Terminating Operation.......................................................................................4-82
REMOTE CONTROL SYSTEM FEATURES ...................................................................4-82
Transmitter.............................................................................................................4-82
Receiver.................................................................................................................4-82
Transmitter Accessories.........................................................................................4-83
Functions of Remote Control System.....................................................................4-83
REMOTE CONTROL SYSTEM COMPONENTS.............................................................4-84
Transmitter Components........................................................................................4-84
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

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Cable Connection Port.......................................................................................4-85
No. 1 Outrigger/Slewing Operation Lever No. 2 Outrigger/Telescoping Operation
Lever No. 3 Outrigger/Winch Operation Lever No. 4 Outrigger/Lifting and
Lowering Operation Lever .................................................................................4-85
Operation Mode Selector Switch.......................................................................4-86
LED Light (Front) LED Light (Control Panel) .....................................................4-86
Left Display Right Display..................................................................................4-86
Transmitter Display Components ...........................................................................4-87
Standby Screen.................................................................................................4-88
Crane/Outrigger Screen.....................................................................................4-88
Menu Screen.....................................................................................................4-88
Status Indications of Display ..................................................................................4-90
Battery Icon .......................................................................................................4-90
Battery Status Icon ............................................................................................4-90
Radio Wave Status Bar .....................................................................................4-90
Error Icon...........................................................................................................4-90
Receiver Components............................................................................................4-91
Control Box........................................................................................................4-91
Monitor LED.......................................................................................................4-92
Connector connection port.................................................................................4-92
Antenna.............................................................................................................4-92
REMOTE CONTROL SYSTEM VERIFICATIONS...........................................................4-93
Before Turning On Transmitter...............................................................................4-93
After Turning On Transmitter..................................................................................4-93
After Starting Engine ..............................................................................................4-93
Checking Engine Start Operation ......................................................................4-94
Checking Engine Stop Operation ......................................................................4-94
Checking Outrigger Operation...........................................................................4-94
Checking Crane Operation................................................................................4-95
REMOTE CONTROL SYSTEM OPERATION..................................................................4-96
Powering ON..........................................................................................................4-97
Starting/Stopping the Engine..................................................................................4-97
Starting the Engine............................................................................................4-97
Stopping the Engine ..........................................................................................4-97
Operation after Engine Is Started...........................................................................4-97
Operation before Work ......................................................................................4-97
Switching Operation Mode.................................................................................4-98
Outrigger Operation................................................................................................4-98
Outrigger Setting ...............................................................................................4-99
Outrigger Stowage...........................................................................................4-100
Crane Operation...................................................................................................4-101
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

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Boom Lift Bypass Switch Operations....................................................................4-104
LED Light Operations...........................................................................................4-105
AFTER CRANE OPERATION........................................................................................4-105
Crane Stowing Operation.....................................................................................4-105
Stopping Operation by Remote Control System...................................................4-105
Inspection after Ending Remote Control System Operation.................................4-106
HANDLING TRANSMITTER BATTERY.........................................................................4-106
Replacement Timing of Battery............................................................................4-106
Replacement Method of Battery...........................................................................4-106
Charging Method of Battery..................................................................................4-107
ELECTRIC MOTOR (OPTION)......................................................................................4-109
ELECTRIC MOTOR COMPONENTS ............................................................................4-110
Travel Controls.....................................................................................................4-110
Starter Switch..................................................................................................4-111
Accelerator Lever ............................................................................................4-111
Power Unit............................................................................................................4-112
Power Supply Box................................................................................................4-113
Main Breaker Switch........................................................................................4-114
Inverter Unit..........................................................................................................4-115
Electric Motor Cover / Protective Cover...........................................................4-115
Inverter Unit.....................................................................................................4-115
12V DC Power Switch .....................................................................................4-115
AC Circuit Power Switch..................................................................................4-116
Power Light (White).........................................................................................4-116
Trouble Light (Red)..........................................................................................4-116
ELECTRIC MOTOR OPERATION.................................................................................4-116
Pre-start Inspection ..............................................................................................4-116
Pre-start Visible Checks ..................................................................................4-116
Pre-Start Inspection.........................................................................................4-116
Post-Start Inspection .......................................................................................4-116
Connecting Power Supply Cable..........................................................................4-117
Operation and Inspection after Connecting Power Supply Cable.........................4-118
Machine Operation...............................................................................................4-119
Stopping Machine.................................................................................................4-120
Disconnecting Power Supply................................................................................4-120
INSTALLING AND REMOVING THE ELECTRIC UNIT ...................................................4-121
Required tools .................................................................................................4-121
Required hoisting attachments........................................................................4-121
Required parts (standard equipment or accessories)......................................4-121
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

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Home Screen .......................................................................................................4-126
Boom Lift Bypass Switch.................................................................................4-126
Searcher Hook Position Display......................................................................4-126
Over Winding Display......................................................................................4-126
User Mode............................................................................................................4-127
Hook Hanging Number Selection/Searcher Hook Position Selection ..............4-127
SEARCHER HOOK OPERATION..................................................................................4-128
AUXILIARY WINCH SAFETY PRECAUTIONS..............................................................4-131
Cautions before Operation ...................................................................................4-131
Cautions during Operation....................................................................................4-131
AUXILIARY WINCH COMPONENTS (OPTION)............................................................4-132
AUXILIARY WINCH MONITOR .....................................................................................4-133
Home Screen .......................................................................................................4-133
Auxiliary Winch Display ...................................................................................4-133
User Mode............................................................................................................4-134
Hook Hanging Number Selection/Auxiliary Winch Selection Advice................4-134
AUXILIARY WINCH - HOW TO INSTALL AND DETACH BOOM HEAD.......................4-135
Installing Boom Head ...........................................................................................4-135
Detaching Boom Head .........................................................................................4-139
AUXILIARY WINCH - MACHINE TRAVELLING POSTURE AND HOISTING METHOD . 4-139
Machine Travelling Posture...................................................................................4-139
TRAILERING..................................................................................................................4-140
Ramp Planks........................................................................................................4-141
Loading / Unloading Procedure............................................................................4-141
HOISTING......................................................................................................................4-142
Recommended Hoisting Attachments ..................................................................4-142
Hoisting Procedure...............................................................................................4-142
Section 5 MAINTENANCE AND INSPECTION
GENERAL MAINTENANCE INFORMATION AND PRECAUTIONS..................................5-2
Parts.........................................................................................................................5-2
Cleaning Parts..........................................................................................................5-2
Cleaning the Machine...............................................................................................5-2
Environment.............................................................................................................5-2
Exhaust ....................................................................................................................5-2
Protective Clothing and Gear ...................................................................................5-3
Tools.........................................................................................................................5-3
Welding ....................................................................................................................5-3
Handling and Service of Electrical Parts...................................................................5-3
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

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Blocking Machine for Maintenance...........................................................................5-8
MACHINE BREAK-IN.........................................................................................................5-8
LEGAL INSPECTION.........................................................................................................5-9
CONSUMABLES................................................................................................................5-9
LUBRICATING OIL..........................................................................................................5-10
SPECIAL TOOLS AND STANDARD TIGHTENING TORQUE ........................................5-11
Accessory Tools.....................................................................................................5-11
Standard Tightening Torque List............................................................................5-11
Bolt and Nut Tightening Torque.........................................................................5-11
Hose Connector Tightening Torque...................................................................5-13
MACHINERY COVER......................................................................................................5-14
Removing Machinery Cover ..............................................................................5-14
Installing Machinery Cover ................................................................................5-14
FUSES.............................................................................................................................5-15
INSPECTION...................................................................................................................5-16
Pre-Start and Post-Start Inspection Items..............................................................5-16
Pre-Start Visible Checks.........................................................................................5-17
Engine ...............................................................................................................5-18
Hydraulic System of Undercarriage (Travel motor, control valve, hydraulic oil
tank, and hose joint) ..........................................................................................5-18
Undercarriage (rubber track, track roller, sprocket and idler).............................5-18
Outriggers..........................................................................................................5-18
Outrigger Cylinder .............................................................................................5-18
Post ...................................................................................................................5-18
Derrick Cylinder.................................................................................................5-18
Boom.................................................................................................................5-18
Telescope Cylinder............................................................................................5-18
Wire Rope..........................................................................................................5-18
Over Winding Detector ......................................................................................5-18
Winch Motor ......................................................................................................5-18
Winch Drum.......................................................................................................5-18
Hook Block ........................................................................................................5-18
Operation Levers...............................................................................................5-18
Pre-Start Inspection................................................................................................5-19
Check / Add Engine Coolant..............................................................................5-19
Check / Add Engine Oil......................................................................................5-20
Check / Add Fuel...............................................................................................5-21
Check / Clean Water Separator.........................................................................5-21
Check Fuel Filter Pot.........................................................................................5-22
Check / Add Hydraulic Oil..................................................................................5-23
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

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Check Deformation, Damage or Wear of Wire Rope.........................................5-25
Post-Start Inspection..............................................................................................5-25
Precautions........................................................................................................5-25
Check / Adjust Rubber Track Tension...............................................................5-26
Check Rubber Tracks for Damage and Wear....................................................5-26
Check Outrigger Safety Device Operation.........................................................5-26
Check Outrigger Interlock Operation .................................................................5-26
Check Outrigger Operation................................................................................5-27
Check Crane Operation.....................................................................................5-28
Check Over Winding Detector Operation...........................................................5-29
Check Moment Limiter Operation......................................................................5-29
Check Emergency Engine Stop Switch (EMO)..................................................5-30
Check Engine Exhaust Gas Color, Noise and Vibration....................................5-30
PERIODIC MAINTENANCE.............................................................................................5-31
Periodic Maintenance Schedule.............................................................................5-31
Periodic Maintenance Procedures..........................................................................5-32
Check / Clean Air Cleaner Element...................................................................5-32
Drain Contaminant Water / Deposits in Fuel Tank.............................................5-34
Grease Machine Units.......................................................................................5-34
Check Oil Level and Refill Oil in Winch Reduction Gearcase............................5-37
Check / Adjust Alternator Belt Tension..............................................................5-38
Check / Refill Oil in Travelling Motor Reduction Gearcase................................5-38
Replace Engine Oil............................................................................................5-39
Replace Engine Oil Filter Cartridge ...................................................................5-40
Replace Fuel Filter.............................................................................................5-41
Replace Hydraulic Oil Return Filter ...................................................................5-42
Replace Air Cleaner Element ............................................................................5-44
Clean Engine Cooling System...........................................................................5-44
Replace Oil in Hydraulic Oil Tank......................................................................5-47
Replace Oil in Slewing Reduction Gearcase.....................................................5-48
Replace Oil in Winch Reduction Gearcase........................................................5-49
Replace Oil in Travelling Motor Reduction Gearcase........................................5-51
Inspect / Adjust Engine Valve Clearance...........................................................5-51
Check Alternator and Starter.............................................................................5-51
GENERAL MACHINE MAINTENANCE ...........................................................................5-52
Batteries.................................................................................................................5-52
Battery Precautions ...........................................................................................5-52
Cold Temperature Precautions..........................................................................5-52
Remove / Install Battery.....................................................................................5-53
Check / Add Battery Electrolyte.........................................................................5-53
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

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xii 1/2019 MC285C-3
Checking Rubber Track Tension.......................................................................5-61
Adjusting Rubber Track Tension .......................................................................5-61
Wire Rope ..............................................................................................................5-63
General Information and Precautions................................................................5-63
Inspecting Wire Rope ........................................................................................5-63
Measuring Wire Rope........................................................................................5-64
Winch Wire Rope - Correcting Twisted Rope....................................................5-64
Winch Wire Rope - Removal .............................................................................5-65
Winch Wire Rope - Installation ..........................................................................5-65
Wire Rope - Boom Telescope Extension................................................................5-68
Inspection..........................................................................................................5-68
Boom Telescope Wire Rope Adjustment...........................................................5-69
STORAGE .......................................................................................................................5-71
Temporary Storage.................................................................................................5-71
Long-Term Storage ................................................................................................5-71
Before Storage ..................................................................................................5-71
During Storage ..................................................................................................5-71
After Storage .....................................................................................................5-72
COLD TEMPERATURE PREPARATION ........................................................................5-72
Engine Oil...............................................................................................................5-72
Engine Coolant.......................................................................................................5-72
Battery....................................................................................................................5-72
After Daily Operation..............................................................................................5-72
SEARCHER HOOK INSPECTION AND MAINTENANCE...............................................5-73
Legal Inspection .....................................................................................................5-73
Consumables .........................................................................................................5-73
Inspection and Maintenance List............................................................................5-74
Pre-Start and Post-Start Inspection Items .........................................................5-74
Pre-Start – Before Starting Engine.........................................................................5-75
E-Boom, Frame and Hook.................................................................................5-75
Greasing............................................................................................................5-75
Searcher Hook Fix Bolts....................................................................................5-75
Position Pin and Lynch Pin................................................................................5-75
Pre-Start – After Starting Engine............................................................................5-76
Moment Limiter for Operation (Searcher Hook Mode).......................................5-76
AUXILIARY WINCH INSPECTION AND MAINTENANCE...............................................5-77
Legal Inspection .....................................................................................................5-77
Consumables .........................................................................................................5-77
Inspection and Maintenance List............................................................................5-78
Pre-Start and Post-Start Inspection Items .........................................................5-78
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

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1/2019 MC285C-3 xiii
Post-Start – After Starting Engine ..........................................................................5-79
Over Winding Detector ......................................................................................5-79
Over-Unwinding Stop Device.............................................................................5-79
Moment Limiter for Operation (Auxiliary Winch Mode) ......................................5-80
Replacement of Winch Wire Rope..........................................................................5-80
Winch Wire Rope - Removal .............................................................................5-80
Winch Wire Rope - Installation ..........................................................................5-81
AUXILIARY WINCH PERIODIC MAINTENANCE............................................................5-83
Periodic Maintenance Schedule.............................................................................5-83
Periodic Maintenance Procedures..........................................................................5-83
Grease Machine Units.......................................................................................5-83
Check Oil Level and Refill Oil in Winch Reduction Gearcase............................5-84
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

Table of Contents Mini-Crawler Crane M A E D A
xiv 1/2019 MC285C-3
This Page Intentionally Left Blank

1/2019 MC285C-3 1-1
Section 1
INTRODUCTION

Section 1 – INTRODUCTION Mini-Crawler Crane M A E D A
1-2 1/2019 MC285C-3
INTRODUCTION
Thank you for purchasing the Maeda Mini Crawler
Crane model MC285C-3.
This manual is intended as a guide for the safe
and effective use of this machine. This manual
describes the procedures for proper operation and
maintenance of the machine.
This manual is available in other languages. If a
different language manual is necessary, contact
your local Maeda distributor for availability.
Save this manual in a designated safe place for
future reference. Should this manual be lost or
damaged, contact Maeda or a Maeda sales
service agency immediately to order a new
manual. This manual should remain with this
machine upon transfer of the machine to a new
owner.
This manual contains information that was
available at the time of print.
The contents of this manual, including
maintenance specifications, tightening torques,
pressure, measuring methods, adjustment values
and illustrations, are subject to change upon
refinement of the machine, without notice.
Machine maintenance procedures may be
updated by Maeda at any time. Always obtain the
latest information from Maeda or a Maeda sales
service agency before performing maintenance
on this machine.
Installation and operation of this machine must
comply with all laws and regulations where
operated.
Only personnel who have obtained a licence
stipulated by the laws and regulations from the
place of use are qualified to operate this machine,
establish the power connection of the power
supply equipment, and inspect and repair the
electric system.
Disclaimers:
All information, illustrations and specifications in
this manual are based on the latest information
available at the time of publishing. The
illustrations used in this manual are intended as
representative reference views only. Moreover,
because of our continuous product improvement
policy, we may modify information, illustrations
and/or specifications to explain and/or exemplify a
product, service or maintenance improvement.
We reserve the right to make any change at any
time without notice.
Maeda is a registered trademark of Maeda
Seisakusho Co., Ltd. in Japan, the United States
and/or other countries.
All Rights Reserved:
No part of this publication may be reproduced or
used in any form by any means - graphic,
electronic or mechanical, including photocopying,
recording, taping, or information storage and
retrieval systems - without the written permission
of Maeda Seisakusho Co., Ltd.
© 2019 Maeda Seisakusho Co., Ltd.
1/2019

1/2019 MC285C-3 2-1
Section 2
SAFETY

Section 2 –SAFETY DEFINITIONS Mini-Crawler Crane M A E D A
2-2 1/2019 MC285C-3
SAFETY DEFINITIONS
Maeda is concerned for your safety and the
condition of your mini-crawler crane. Safety
statements are one of the primary ways to call
your attention to the potential hazards associated
with Maeda mini-crawler cranes. Follow the
precautions listed throughout the manual before
operation, during operation and during periodic
maintenance procedures for your safety, the
safety of others and to protect the performance of
your mini-crawler crane. Keep the labels from
becoming dirty or torn and replace them if they are
lost or damaged. Also, if a part needs to be
replaced that has a label attached to it, make sure
to order the new part and label at the same time.
This safety alert symbol appears with
most safety statements. It means
attention, become alert, your safety is
involved! Please read and abide by
the message that follows the safety
alert symbol.
Indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
Indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
Indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
Indicates a situation which can cause damage to
the mini-crawler crane, personal property and/or
the environment, or cause the equipment to
operate improperly.
SAFETY PRECAUTIONS
There is no substitute for common sense and
careful practices. Improper practices or
carelessness can cause burns, cuts, mutilation,
asphyxiation, other bodily injury or death. This
information contains general safety precautions
and guidelines that must be followed to reduce
risk to personal safety. Special safety precautions
are listed in specific procedures. Read and
understand all of the safety precautions before
operating or performing repairs or maintenance.
This safety section cannot cover every situation
that may occur that is incidental to the use of the
machine. Use common sense if you encounter a
situation that is not covered to help avoid a
hazardous situation.
The safety messages that follow have
CAUTION level hazards.
Pre-Operation Hazard
・Never permit anyone to install or
operate the machine without
proper training.
・Read and understand this Operation Manual
before operating or servicing the crane to
ensure that safe operating practices and
maintenance procedures are followed.
・Safety signs and labels are additional
reminders for safe operating and maintenance
techniques.
・Contact us or our sales service agency for
additional training.
・Make sure you are aware of licences, laws and
regulations that may be required or in effect
where the machine is operated.
NOTICE