Komatsu WA380-3MC Wheel Loader Service Manual
798 pages · Publication CEBM003402
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- Models
- WA380-3MC
- Serial coverage
- A51001 and up
- Manual type
- Service Manual
- Pages
- 798
- Publication
- CEBM003402
- Condition
- Brand new
What's inside
From the manual's own table of contents: 2 sections, 83 entries. See sample pages (PDF, 1034 KB)
General4 topics
- GENERAL
- STRUCTURE AND FUNCTION
- TESTING AND ADJUSTMENT
- MAINTENANCE STANDARD
STRUCTURE AND FUNCTION48 topics
- Main control valve
- 2-spool valve
- 3-spool (option)
- Relief valve
- Suction valve
- Operation of cut-off valve
- Boom and bucket spool hold position
- Boom spool at lower position
- Boom spool at float position
- Bucket spool at tilt position
- Bucket spool at dump position
- Work equipment linkage
- Bucket
- Bucket positioner and boom kick-out
- Rops cab
- Air conditioner
- Electric circuit diagram (foldout)
- Electric circuit diagram ECSS (foldout)
- Machine monitor system
- Main monitor
- Maintenance monitor
- Transmission auto-shift control system
- System structure diagram
- Safety function
- Transmission controller
- suspension system)
- Sensors
- Engine oil level sensor
- Radiator water level sensors
- Engine water temp. Sensor
- Engine speed sensor
- Engine oil pressure sensor
- Engine stop circuit
- Ether start circuit
- Electric transmission control
- Combination switch
- Kick-down, hold switch
- Normal operation
- Kick-down switch operated
- (case I)
- (case II)
- Transmission cut-off switch
- Transmission cut-off function
- Electric parking brake control
- Parking brake emergency release switch
- Emergency brake switch
- Parking brake safety relay
- Neutralizer relay
TROUBLESHOOTING29 topics
- Points to remember when troubleshooting
- Sequence of events in troubleshooting
- Precautions when carrying out maintenance
- Checks before troubleshooting
- Method of using troubleshooting charts
- Troubleshooting of engine system (S mode)
- Troubleshooting of main monitor system (M mode)
- Troubleshooting of maintenance monitor system (K mode)
- Troubleshooting of electrical system (E mode)
- Troubleshooting of hydraulic and mechanical system (Chassis related) (T mode)
- Troubleshooting of ECSS (Electrical control Suspension System) (D mode)
- Troubleshooting of transmission controller system (with Auto-shift transmission) (A mode)
- S-1 Starting performance is poor (starting always takes time)
- S-2 Engine does not start
- Engine does not turn
- Exhaust gas comes out but engine does not start (fuel is being injected)
- S-3 Engine does not pick up smoothly (follow-up is poor)
- S-4 Engine stops during operations
- S-5 Engine does not rotate smoothly (hunting)
- S-6 Engine lacks output (no power)
- S-7 Exhaust gas is black (incomplete combustion)
- S-9 Oil becomes contaminated quickly
- Fuel consumption is excessive
- Oil is in coolant water, or coolant water spurts back, or water level goes down
- Oil pressure lamp lights up (drop in oil pressure)
- Oil level rises
- Coolant water temperature becomes too high (overheating)
- Abnormal noise is made
- Vibration is excessive
Inside this manual
Real pages from this service manual (798 pages). Open the sample pages (PDF, 1034 KB)
- Specifications, page 286: TESTING AND ADJUSTING
- Troubleshooting, page 334: TROUBLESHOOTING
- Diagram, page 406: TROUBLESHOOTING
- Foldout diagram, page 795
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, 798 pages
Quantity one is the manual described above.
Fast free USA shipping
Ships in 1 business day.
60-day returns
Free if the mistake is ours. A manual ordered in error must come back unopened in its shrink-wrap; you pay return shipping and a 20% restocking fee applies. Return policy
Binder not included
Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.
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).