2000 Komatsu WA380-3 Wheel Loader Shop Manual (P/N VEBM460104)

The 2000 Komatsu WA380-3 Shop Manual, publication VEBM460104, covers wheel loaders from WA380H20051 upward, with High-Lift specifications included. This is the March 2000 edition of Komatsu's workshop repair documentation.

Text search, bookmarks and diagram detail: Text search is available across the main sections, with bookmarks for major chapters and components. Some font-encoded text and drawing labels are not reliably searchable. Small electrical labels require zooming; the transmission hydraulic schematic remains pixelated when enlarged.

• Engine and cooling: Valve-clearance and injection-timing adjustments, compression and blow-by tests, turbocharger checks, and engine, cylinder-head, radiator and water-pump removal/installation.

• Transmission and axles: Torque converter, transmission and clutch-pack disassembly/assembly; ECMV operation, differential service, axle housing repair and final-drive inspection standards.

• Steering and brakes: Orbit roll and steering-valve service, emergency steering, brake-pressure tests, wet multiple-disc brake wear checks, parking-brake service and brake bleeding.

• Work hydraulics: Main control valve and PPC valve overhaul, hydraulic/steering pump assembly removal, cylinder rebuilding, drift checks, bucket-positioner and boom kick-out adjustments.

• Electrical diagnosis: Main and maintenance monitor functions and troubleshooting, transmission-controller fault charts, connector pin arrangements, and ECSS/ALS suspension control diagnosis.

• Air conditioning: Fault diagnosis, evacuation and charging procedures, compressor oil checks, and removal/installation of the compressor, condenser and receiver.

Written for service personnel, this manual assumes workshop equipment and experience with hydraulic testing and heavy component handling.

Engine Builds and High-Lift Coverage

Engine specifications are divided at WA380H20501: S6D108 data apply through WA380H20500, followed by S6D114E1 data. Separate test specifications help match valve adjustment, injection timing and engine-condition checks to the installed engine.

High-Lift dimension and weight tables cover machines through WA380H20500. The general section distinguishes standard, HD and light material buckets.

Engine repair coverage includes component removal and installation, but this volume does not contain a complete internal engine overhaul.

Power Train Repair and Assembly Precautions

It details the precise operation of the transmission control valve and the electronic control modulation valve (ECMV). TCA37-2A torque-converter information is supported by the Transmission Hydraulic Circuit Diagram; axle sections distinguish torque-proportioning and limited-slip differentials.

Clutch-pack assembly notes flag piston-seal damage when the specified seal-fitting preparation is omitted. The differential/brake assembly procedure warns that hammering the brake piston can damage both the piston and its D-ring.

Hydraulic Variants, Steering and Brake Circuits

Main control valve coverage separates builds through WA380H20383, WA380H20384–WA380H20836, and WA380H20837 onward. Work Equipment Hydraulic System Diagrams and Brake Circuit Diagrams identify their applicable serial ranges, helping you select the correct circuit before fault tracing.

Steering descriptions cover demand valves and overload relief valves. Cylinder procedures address the steering, boom and bucket assemblies, while pressure-test data and maintenance standards provide the associated inspection limits.

Observe the manual's precautions for stored hydraulic pressure, raised work equipment and heavy lifts.

Fault Codes, Connector Tests and Wiring Limits

Transmission-controller A-mode charts connect failure codes to solenoid, sensor, power-supply and network tests. S-mode engine diagnosis and T-mode hydraulic/mechanical charts address symptoms such as low power, shift shock and boom or bucket drift. D-mode covers ECSS faults, including model-selection checks.

Electrical references include the Engine Starting Circuit, Kick-Down Electric Circuit Diagram and Connector Pin Arrangement Diagram. Hose-routing views, dimensional drawings and component cross-sections support identification during repair.

Foldout coverage: Individual system circuits and wiring legends are included, but the main machine-wiring foldouts and referenced air-conditioning foldouts are absent. Insertion notices remain in their places.

Service Specifications and Special Tools

Weight tables, lubrication charts and maintenance standards supply engine, transmission and axle fluid capacities, viscosity requirements, clearances and wear tolerances. The bolt-size torque list gives values in Nm, kgm and lbft, with separate precautions for plastic fastening points.

The special-tool lists identify brake test kit 793-605-1001 and the seal-fitting tools used during transmission clutch-pack assembly.

Printable PDF and Included Pages

One printable English 946-page PDF, including 1 cover page, 7 preliminary pages and 42 numbered insert pages. Blank pages and foldout placeholders are already included in the total; no separate supplement accompanies the file.