2001 Komatsu WA65-3, WA75-3, WA85-3, WA90-3, and WA95-3 Wheel Loader Shop Manual (P/N VEBM950201)

Komatsu shop manual VEBM950201, printed December 2001, covers the WA65-3, WA65-3 Parallel Lift, WA75-3, WA85-3, WA90-3 and WA95-3 wheel loaders. It combines system descriptions with workshop testing, adjustment and repair procedures.

• Engine service: Engine, starter, alternator and water-pump removal and installation, plus valve-clearance checks, compression testing, injection-nozzle testing and fuel-injection-pump timing adjustment.

• Hydrostatic drive: Drive take-up and stall-speed checks, feed/servo-pressure testing, travel-pressure cut-off adjustment, and variable-displacement pump and motor replacement.

• Axles and gearing: Wheel-hub and planetary-gear disassembly, bevel-pinion setup, limited-slip differential adjustment, and optional high-speed reduction-gear overhaul.

• Brakes and steering: Brake wear checks, bleeding, parking-brake adjustment, inch-valve linkage setting, and priority-valve and steering-valve removal and installation.

• Work equipment: Lift, dump and steering cylinder replacement, quick-coupler service, main and pilot control valve removal, and bucket-positioner adjustment.

• Electrical and cab systems: Sensor test tables, wiring diagrams, optional air-conditioning troubleshooting, compressor and magnetic-clutch replacement, and cab-window replacement.

Written for service personnel performing workshop repairs, this manual uses pressure-testing equipment, lifting gear and specialized axle-setting tools.

Engine Testing and Service Limits

The compression-test procedure identifies adapter YMTOL-97190030. Engine removal and refitting are covered, but detailed engine work is referred to the separate Engine Shop Manual P/N YMHINSHI-H8013, which is not included in this download.

Maintenance guidance covers fluids, filters and cooling, with standard and fine metric-thread torque tables in Nm and kpm for steel and cast aluminum components. The fan-belt section warns that excessive tension shortens pulley and bearing life.

Hydrostatic Drive and Axle Repair

The drive-pump section explains how feed pressure also supplies the PPC servo circuit. Distributor-box drawings distinguish standard single-stage gearing from the optional two-stage unit used on WA75-3 through WA95-3.

Separate rear-axle sections address the smaller models and the WA90-3/WA95-3 assemblies. They cover bearing preload, shim selection and gear backlash, with a limited-slip differential exploded view and special-tool drawings.

Reduction-gear procedures include selector-fork and gear-control-cylinder work. The teardown notes warn that forcing the housings apart can damage mating faces and shims.

Serial-Specific Hydraulics and Loader Equipment

Travel, steering and work-hydraulic drawings change at HA940171 for WA65-3, HA950335 for WA75-3 and HA960130 for WA85-3. WA90-3 and WA95-3 have later layouts from HA970123 and HA980118, respectively.

These distinctions help technicians select the correct circuit before tracing faults involving optional ALS, hose-burst protection or the third control circuit.

The main control valve has port-identification drawings and a tilt-in/tilt-out sectional view, plus pressure adjustment and removal/refitting procedures; this is not a complete internal valve-rebuild guide. Lifting-frame drawings distinguish the Parallel Lift linkage, while steering coverage explains the central articulation joint and Orbit-roll valve.

Before teardown, follow the manual's pressure-relief, articulation-locking and load-support precautions.

Electrical Diagrams and Optional Air Conditioning

The engine stop/start/preheating circuit and Wiring Diagrams Fig. 1 and Fig. 1a show starting, charging and drive-interlock connections. Legends identify connectors and component codes; sensor tables supply continuity and resistance criteria.

The later Fig. 1a-5a diagrams and bucket-positioner coverage use separate model-specific serial thresholds, listed on PDF pp. 135 and 161.

Optional R134a air-conditioning coverage includes pressure-based fault tables, evacuation and filling guidance, and compressor service. Refrigerant filling is specified as work for an air-conditioning specialist.

Valve Clearance and Differential Setup Examples

These are a small selection of the manual's engine and axle adjustment specifications.

Cold valve clearance: The adjustment section gives 0.2 ± 0.05 mm for WA65-3/WA75-3/WA85-3 and 0.3 ± 0.05 mm for WA90-3/WA95-3.

Differential setup: For WA65-3/WA75-3/WA85-3, initial bevel-gear backlash is approximately 0.15-0.18 mm before bearing preload is applied. The limited-slip differential disc pack, including shims, totals 17.5 ± 0.1 mm.

PDF Navigation and Download Contents

Text search and diagram detail: Text search is available in the main service sections, with embedded bookmarks for chapters and component sections. Many labels within wiring drawings are not searchable. Small foldout labels require zooming.

The ZIP contains one printable, 422-page PDF: six opening pages (cover, contents and four revision-list pages) plus 416 section and appendix pages. The total includes nine foldout wiring diagrams and all retained blank, pagination-notice and foldout-insertion pages.