Komatsu WA900-3E0 Wheel Loader Service Manual
171 pages · Publication SEN05654-00
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- Models
- WA900-3E0
- Serial coverage
- 60079 and up
- Manual type
- Service Manual
- Pages
- 171
- Publication
- SEN05654-00
- Condition
- Brand new
What's inside
From the manual's own table of contents: 7 sections, 86 entries. See sample pages (PDF, 585 KB)
Index and foreword2 topics
- Foreword
- Before reading this manual
Specification4 topics
- Specification dimension drawing
- Specifications
- Weight table
- Table of fuel, coolant and lubricants
Structure and function10 topics
- Cooling system and related devices
- Cooling system
- Hydraulic system
- Power ladder system
- Electrical system
- Power ladder controller
- Rear view monitor system
- Engine service monitor system
- Parking brake circuit
- Sensor
Standard value table2 topics
- Standard value table for chassis
- Standard value table for electrical system
Testing and adjusting3 topics
- Inspection and adjustment of potentiometer
- Ladder position calibration procedure
- Procedure for testing diodes
Troubleshooting51 topics
- General information on troubleshooting
- Classification and procedures of troubleshooting
- Failure codes table
- Fuse locations
- Troubleshooting by failure code
- Failure code [D1EMKA] (Disconnection of parking brake interlock relay)
- Failure code [D1EMKB] (Ground fault of parking brake interlock relay)
- Failure code [D1EMKY] (Hot short of parking brake interlock relay)
- Failure code [D1EPKA] (Disconnection of ladder drive pump relay)
- Failure code [D1EPKB] (Ground fault of ladder drive pump relay)
- Failure code [D1EPKY] (Short circuit of ladder drive pump relay)
- Failure code [D1EQKY] (Ladder operation alarm relay output hot short circuit)
- Open circuit, ground fault)
- Failure code [D1ERKB] (Ladder raise solenoid output ground fault)
- Open circuit, hot short circuit)
- Failure code [D1ESKB] (Ladder lower solenoid output ground fault)
- Failure code [DBL0KR] (Power ladder controller CAN-NET signal line open circuit)
- Failure code [DBL0KT] (Non-volatile memory write error)
- Failure code [DBL1KK] (Power Low Error: Battery direct)
- Failure code [DBL2KK] (Solenoid Power Low Error)
- Failure code [DDB6KZ] (Parking brake system abnormality)
- Failure code [DDDGKY] (Ladder operation switch hot short circuit)
- Failure code [DDDKKY] (Ladder raise operation switch hot short circuit)
- Failure code [DDDLKY] (Ladder lower operation switch hot short circuit)
- Failure code [DK5VKX] (Ladder angle sensor abnormality: Out of range)
- Failure code [DK5VMA] (Power ladder system abnormality)
- Failure code [DUM9KY] (Ladder indicator output hot short circuit)
- Failure code [DV00KY] (Ladder interlock caution output hot short circuit)
- Failure code [DWNLKA] (Ladder cushion valve output open circuit)
- Failure code [DWNLKB] (Ladder cushion valve output ground fault)
- Failure code [DWNLKY] (Ladder cushion valve output hot short circuit)
- Troubleshooting of electrical system (E-mode)
- E-1 Power ladder does not operate
- E-2 Brake oil temperature warning keeps lighting
- E-3 Parking brake does not operate (as emergency brake)
- E-4 Parking brake is applied while machine is traveling
- E-5 Parking brake is released as starting switch is turned to ON position
- Troubleshooting of hydraulic and mechanical system (H-mode)
- H-1 Power ladder does not move or its speed is low
- H-2 Fan of ADD cooler does not rotate
- Troubleshooting of maintenance monitor system (K mode)
- Maintenance monitor system
- K-1 Hydraulic oil level gauge flashes
- Troubleshooting for machine monitor (M-mode)
- M-1 Rear view monitor does not operate
- M-2 While clearance lamp is turned on, illuminance of rear view monitor remains dark
- M-3 Rear view monitor does not work in reverse-interlock mode
- M-4 Illuminance of rear view monitor cannot be adjusted
- on engine service monitor
- M-6 Engine compartment lamp does not light up
- M-7 Step lamp does not light up
Diagrams and drawings7 topics
- Hydraulic circuit diagram
- Symbols used in hydraulic circuit diagram
- Power train hydraulic circuit diagram
- Brake, power ladder and additional cooler hydraulic circuit diagram
- Work equipment hydraulic circuit diagram
- Electrical circuit diagram
- Symbols used in electric circuit diagram
Inside this manual
Real pages from this service manual (171 pages). Open the sample pages (PDF, 585 KB)
- Specifications, page 15: Specification
- Troubleshooting, page 67: Failure code [D1EMKA] (Disconnection of parking brake interlock relay)
- Diagram, page 149: Hydraulic circuit diagram
- Foldout diagram, page 160: Electrical circuit diagram (1/2)
Other manuals for this machine
Save 10% on 2 manuals, 15% on 3 or more. Other manuals for the WA900-3E0 are listed below. Editions cover different serial number ranges: check the serial coverage and tick only the ones that match your machine.
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This is a service manual
Here's how it compares to the other manual types.
Service manual
Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.
Operator's manual
Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.
Parts manual
Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.
Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.
What it's used for
Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.
Service shops and owner/operators who repair their own equipment
Identifying correct parts and seeing how assemblies come apart and go back together
Keeping equipment running with less downtime
Factory manual, 171 pages
Quantity one is the manual described above.
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Other editions and similar models
Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).