Komatsu WA380-3 / WA380-3 Avance / WA380-3H / WA380-3H High-Lift / WA380-3 Active Wheel Loader 2000–2005 Shop Manual (P/N SEBM006105)

These two Komatsu WA380-3 shop manuals cover separate machine families, so the serial plate should be matched before a repair procedure, schematic, or specification table is selected. The set contains an 808-page PDF identified on its cover as SEBM006105 for WA380-3 Avance Loader serial 50001 and up, plus a 946-page PDF identified as VEBM460104 for WA380H20051 and up; 1,754 pages total. The first book was printed in Japan in September 1997, while the H-series book was printed in Europe in March 2000. Komatsu prepared this material for service personnel, and the repair procedures assume workshop experience and access to suitable lifting, hydraulic-test, and electrical-test equipment.

Coverage is not limited to structural theory. Both books contain General, Structure and Function, Testing and Adjusting, Disassembly and Assembly, and Maintenance Standard sections.

• Engine variants and procedures: The 50001-up book covers the S6D108 installation. The H book separates S6D108-equipped H20051-H20500 machines from S6D114E-1 machines beginning at H20501. Engine content includes compression, blowby, turbocharger, and oil-pressure checks; valve-clearance and injection-timing adjustment; cylinder-head and external-component work; and complete engine removal/installation.
• Transmission, axles, and driveline: Powertrain repair runs from torque-converter/transmission removal through transmission, clutch-pack, and control/accumulator/modulating-valve disassembly and reassembly. The axle chapters add drive shafts, front and rear axle removal, differentials, final drives, axle housings, and center-hinge service.
• Steering and brakes: Procedures address orbit-roll and steering valves, steering cylinders, emergency steering, brake valves and accumulators, and the parking brake. Brake performance and wear testing, system bleeding, accumulator testing, and emergency-release methods are included.
• Hydraulics and work equipment: Shop procedures cover the hydraulic/steering/switch/PPC pump group, PPC and main control valves, relief and safety valves, boom and bucket cylinders, and work-equipment removal/installation. Testing includes hydraulic and PPC pressure checks, bucket-positioner and boom-kickout adjustment, accumulator checks, and ECSS/ALS diagnosis.
• Electrical diagnosis and controllers: Factory charts cover S, M, K, E, T, and D diagnostic modes for the engine, monitors, electrical circuits, chassis, and suspension system. SEBM006105 adds W-mode work-equipment controller faults; VEBM460104 adds A-mode automatic-transmission controller faults. Failure-code tables, connector pin arrangements, relay locations, and circuit checks support fault isolation.
• Cab and air conditioning: Coverage includes the cab and floor frame, ROPS cab, and removal/installation of the air-conditioning unit, condenser, receiver-drier, and compressor. The H volume adds air-conditioning system operation, safety, charging checks, and fault charts.
• Diagrams and reference data: Named material includes the transmission hydraulic circuit, serial-specific brake circuits, work-equipment hydraulic diagrams, emergency-steering diagrams, ECSS/ALS system structure diagrams, and machine wiring diagrams. Component section and exploded views are backed by torque tables, pressure-test data, fluid capacities, electrical values, clearances, wear limits, and maintenance judgment standards.

Serial Breaks and Configuration Changes

SEBM006105 distinguishes 50001-52999 from 53001-up machines in its specifications and selected cab, engine-component, PPC-valve, and cylinder procedures. It also separates accumulator charge-valve information for 50001-50034 and 50035-up machines.

VEBM460104 is not one generic H-series configuration. Brake hydraulic content is divided among H20051-H20338, H20339-H20470, and H20471-up machines. Main control-valve layouts change at H20384 and H20837. Emergency-steering, work-equipment hydraulic, and wiring coverage also changes at H20837, with further schematic breaks at H20501 and H20987. Suspension coverage distinguishes ECSS through H20356, ECSS Plus for H20357-H20383, and ALS from H20384. The same book provides standard and High-Lift dimensional and weight data for H20051-H20500 machines.

Special Tools, Repair Notes, and Scope

Special-tool tables identify the 799-101-5002 hydraulic tester, 793-605-1001 brake test kit, 793-415-1210/1220 transmission lifting tools, and 793-422-1120 differential-pinion mandrel. Component weight tables support lifting plans, while the maintenance-standard pages give inspection and wear limits for disassembled drivetrain, steering, brake, hydraulic, and work-equipment parts.

The procedures flag assembly traps that matter during major repair work. The S6D114E-1 valve-adjustment section warns that leaving the engine timing pin engaged can damage the pin. During differential setup, changing total bevel-gear shim-stack thickness disturbs bearing preload; hammering the brake piston can damage its D-ring and piston.

These are machine/chassis shop manuals, not parts catalogs or operator manuals. They include engine diagnosis, cylinder-head and external engine-component work, and complete engine removal/installation, but not a full internal engine overhaul. SEBM006105 specifically directs detailed S6D108 engine work to the separate 108 Series Engine Shop Manual. Optional systems or attachments shown may not be fitted to every machine.

Safety notice: Always follow the complete safety and procedure information in the applicable manual and established shop protocols. Secure the articulated frame and wheels, support raised work equipment, release hydraulic and accumulator pressure, isolate the battery, and use rated lifting equipment before service.