Komatsu WA380-8 Wheel Loader Parts Book Manual – Serial No H65051 and up (VENPB48000)

Description

Komatsu WA380-8 Wheel Loader Parts Book Manual – Serial No H65051 and up (VENPB48000)

The Komatsu WA380-8 Wheel Loader Parts Book Manual – Serial No H65051 and up (VENPB48000) is the definitive OEM parts reference for equipment owners, fleet managers, field mechanics, and parts specialists operating and servicing the WA380-8 wheel loader. Designed to facilitate precise part identification, ordering, and assembly reference, this catalog provides fully illustrated exploded diagrams paired with exact factory part numbers, component descriptions, assembly hierarchy, and required quantities per machine.

File Details

• Manual Type: Parts Book / Spare Parts Catalog
• Equipment Brand: Komatsu
• Machine Model: WA380-8 Wheel Loader
• Applicable Serial Numbers: Machine Serial Number H65051 and up; Engine Serial Number 22187771 and up
• Engine Model: Komatsu SAA6D107E-3E Diesel Engine
• Document Publication Numbers: VENPB48000 (Hardcopy) / VENPC48000 (CD)
• Language: English (Foreword provided in English, French, German, Italian, Portuguese, Arabic, Russian, and Chinese)
• Page Count: 960 pages (880 pages plus numerical index)
• File Format: PDF (Digital Delivery)

Chapters Covered

• A0 Engine Cylinder Head and its Related Parts: Engine Assembly, Cylinder Head, Cylinder Head Cover, Air Intake Port Cover, Air Intake Connector, Air Transfer Connection, Exhaust Manifold Mounting, Exhaust Manifold, Komatsu Variable Geometry Turbocharger (KVGT), Turbocharger Oil Piping, Heat Shields, Exhaust Gas Re-circulation (EGR) Valve, Lifting Arrangement, EGR Cooler Air and Water Piping, Coolant Adapters, DEF Related Parts, KDPF Brackets, and Rear Gear Housing Fitting Plugs.
• B0 Engine Cylinder Block and its Related Parts: Lubrication Oil Pump, Front Gear Cover, Spare Maintenance Parts, Rocker Arm Assembly, Flywheel Housing, Flywheel and Mounting, Engine Oil Pan and Drain Piping, Engine Oil Level Sensor, Cylinder Block and Main Bearing Caps, Breather Related Parts, Cabin Heater Plugs, Crankshaft, Vibration Damper, Piston and Connecting Rod Assembly, Engine Oil Filler, Oil Level Gauge, and Rear Gear Housing.
• C0 Engine Lubrication System: Engine Oil Filter Cartridge, Engine Oil Cooler Head and Core, and Engine Coolant Vent Lines.
• D0 Engine Fuel System: Fuel Filter Piping, Fuel System Covers, Fuel Injection Supply Pump, Common Rail Fuel Piping, Fuel Filter Mounting, Fuel Filters, and Fuel Drain Piping.
• E0 Engine Cooling System: Cooling Fan Drive, Fan Drive Mounting, Cooling Fan Belt, Belt Tensioner, Water Pump, Water Outlet and Inlet Connectors, Thermostat, Coolant Heater Plug, and Engine-Mounted Hydraulic Pump and Lines.
• F0 Engine Electrical System: 90A Alternator (Assembly and Inner Parts), Alternator Mounting, 5.5 kW Starting Motor (Assembly, Mounting, and Inner Components), Wiring Harnesses, Electrical Brackets, and Hardware.
• G0 Engine Accessories and Others: Camshaft Performance Parts, Fuel Injectors, High-Pressure Connectors, Common Rail Assemblies, and Engine Control Module (ECM) Mounting.
• I0 Engine Marks and Plates: Caution Plates for EU Safety Regulations and Air Heater Tags.
• Y0 Field Repair Service Parts (Engine): Camshaft Bushings, Crankshaft Oversize/Undersize Bearings, Thrust Washers, and Oversize Pistons and Rings.
• B0 Engine Related Parts (Chassis Side): Engine Mounts, Main Engine Wiring Harnesses (Parts 1 to 3), Air Cleaner and Filter Elements, Closed Crankcase Ventilation (KCCV) Ventilator and Lines, Dust Indicators, Air Cleaner Covers (Cap Type and Pre-cleaner Turbo 2 Type), Exhaust Pipes, Komatsu Diesel Particulate Filter (KDPF Assembly and Inner Parts), Selective Catalytic Reduction (SCR Assembly and Sensors), and DEF Mixing Tube.
• C0 Cooling System: Radiator Core, Aftercooler Assembly, Hydraulic Fan Motor and Internal Relief Valves, Condenser Assembly, Oil Cooler, Radiator Shrouds, and Power Train Oil Cooler.
• D0 Fuel System (Chassis Side): Fuel Tank and Strainers, Fuel Level Sensors, Fuel Lines, Fuel Prefilter Assemblies, Water-in-Fuel Sensors, Breathers, Optional Fuel Tanks for Additional Counterweight Configurations, DEF Tank Frame, DEF Tank Brackets, DEF Lines, Pumps, and Relay Boxes.
• E0 Electrical System: 180 Ampere Batteries, Battery Boxes, Road Traffic Rear Combination Lamps, Directional Signals, License Plate Lamps, Front Wiring Harnesses, Super High Lift Arm Harnesses, Cab and Chassis Cables, Forward Driving Lamps, Halogen Work Lamps, 4-LED and 8-LED Working Lamps, Xenon Front Lamps, Tiltable Beacon Lamps, Horns, and Highway Reflectors.
• F0 Power Transmitting System: Center, Front, and Rear Propeller Shafts, Spider Assemblies, Transmission Case, Forward and Reverse Housing, 1st through 4th Speed Clutches, Output Shafts, Power Take-Off (PTO) Gears, Transmission Control Valves, Solenoid Valves, ECMV Valves, Transmission Filters, Relief Valves, Secondary Steering Motors and Pumps, Front and Rear Axles (Standard and Limited Slip Differential Variants), Differential Pinion and Cage, Final Drives, and Wet Brake Cooling Piping.
• H0 Hydraulic System: Hydraulic Oil Tank, Filter Elements, 2-Spool and 3-Spool Control Valves, Steering Demand Valves, Loader Pumps, Steering Pumps, Fan and Brake Pumps, Power Train Pumps, EPC Work Equipment Valves, Quick Coupler Lines, High Lift Boom Lines, Standard Boom Lines, Joystick Steering Hydraulic Lines, and Stop Valves.
• J0 Frame and its Related Parts: Front and Rear Frames, Articulation Hinge Pins, Steering Cylinders, Articulate Lock Bars, Frame Bottom Guards, Powertrain Guards, Rear Axle Supports, and Remote Central Greasing Systems for Standard, High Lift, and Super High Lift Booms.
• K0 Operator’s Compartment and Control System: Operator Seats (2-Point and 3-Point Belts), ROPS Cab Structure, Brake Pedals, Accelerator Controls, Steering Columns, Orbitrol Valves, Cab Wiring, Windshield Washer Systems, Air Conditioner Units, Ducting, Filters, KOMTRAX 3G Controller and Antennas, EPC Multi-Function Mono Levers, 2-EPC and 3-EPC Loader Control Levers, Joystick Steering Consoles, and Brake Control Accumulators.
• M0 Guards and Covers: Engine Hood Structure, Side Doors, Grilles, Rear Fenders, Mudguards, Access Ladders, Handrails, Mirrors, Rearview Cameras, and Standard and Heavy Counterweights.
• S0 Suspension, Wheel and their Related Parts: Rim Assemblies for 23.5 R25 and 20.5 R25 Tires.
• T0 Work Equipment: Standard, High Lift, and Super High Lift Booms and Bell Cranks, Quick Couplers, 3.1 m3 to 3.6 m3 Round and Flat Bottom Buckets, Performance Buckets, Hensley Teeth, Bolt-on Cutting Edges, Spill Guards, Wear Plates, Fork Carriers, Lift Cylinders, and Bucket Cylinders.
• U0 Marks and Plates: Exterior, Interior, Boom, and Hydraulic Tank Decals, and ROPS Plates.
• V0 Auxiliary Parts and Tool: On-board Tool Kits, General Tool Sets, and Fire Extinguishers.
• W0 Miscellaneous: Cold Area Starting Kits, Central Lubrication Filling Cylinders, Bucket Tooth Covers, and Cab Roof Rails.
• Y0 Field Repair Service Parts (Chassis): Overhaul Gasket and Seal Service Kits.
• Numerical Index: Cross-reference index linking Komatsu part numbers directly to figure numbers and index positions.

IMAGES PREVIEW

For service personnel, workshop managers, and machine operators, this parts catalog serves as an indispensable bridge between troubleshooting guides and physical repairs. While repair manuals describe assembly procedures, the parts book reveals the exact structural hierarchy of components—displaying how every bearing, seal ring, shim, spacer, flange, connector, and retention bolt interfaces within the machine. Having direct access to this information prevents improper assembly sequences, assists in sourcing individual internal service components without purchasing entire assemblies unnecessarily, and eliminates costly equipment downtime caused by ordering incorrect replacement parts.

Comprehensive Technical and System Breakdown

Komatsu SAA6D107E-3E Engine and Emissions Systems

The manual provides thorough coverage of the EPA Tier 4 Final / EU Stage IV compliant Komatsu SAA6D107E-3E diesel engine (serial number 22187771 and up). Technicians can view detailed exploded diagrams of the Komatsu Variable Geometry Turbocharger (KVGT), complete with actuator lines, mounting studs, joint bolts, and heat shielding. Fuel system coverage encompasses the high-pressure common rail manifold, electronically controlled fuel supply pump, feed tubes, fuel injectors, check valves, and dual fuel filter heads with water-in-fuel sensors. The emissions and exhaust layout includes complete parts documentation for the Komatsu Diesel Particulate Filter (KDPF), Selective Catalytic Reduction (SCR) assembly, DEF mixing tube, DEF dosing injector, DEF supply pump, heating lines, NOx sensors, and electronic relay boxes.

Powertrain, Transmission, and Axle Assemblies

Detailed figures illustrate the multi-clutch countershaft power shift transmission and torque converter system. Illustrated assemblies detail the 1st through 4th speed clutch packs, forward and reverse clutch cylinders, wave springs, separator plates, friction discs, and snap rings. Control components—including the Electronically Controlled Modulation Valves (ECMV), solenoid bodies, relief valve spools, internal filter screens, and secondary steering auxiliary pumps—are cataloged down to every individual O-ring and backup ring. Axle coverage breaks down both front and rear planetary final drives, wet disc brake assemblies, brake oil cooling circuits, and differential carriers in both standard open and optional limited-slip differential (LSD) configurations.

Hydraulic Distribution and Pilot Control Circuits

Every hydraulic circuit on the WA380-8 is clearly mapped. The catalog details the variable displacement piston loader pumps, gear-type steering pumps, fan drive motors, and brake charge systems. Comprehensive figures break down the 2-spool and 3-spool closed-center load sensing system (CLSS) main control valves, stabilizer valves, demand valves, EPC pilot pressure valves, and proportional accumulators. Cylinders—including dual double-acting lift cylinders, bucket tilt cylinders, and steering cylinders—are illustrated with complete internal seal kits, wear rings, pistons, cylinder heads, and grease port fittings.

Work Equipment, High-Lift Linkages, and Cab Ergonomics

Whether outfitted with standard boom geometry, High Lift, or Super High Lift arm linkages, this manual outlines the specific boom structures, bell cranks, bucket cylinder pins, and automated greasing distribution blocks for each variation. Coverage includes quick couplers, multiple bucket volume capacities (3.1 m3, 3.2 m3, 3.5 m3, and 3.6 m3), Hensley ground engaging tools, and bolt-on cutting edges. For the operator compartment, the manual shows parts breakdowns for the ROPS/FOPS pressurized cab structure, air suspension seat assemblies, multi-function EPC mono levers, steering columns, monitor display clusters, KOMTRAX satellite telematics modules, and complete HVAC heating and air conditioning units.

Komatsu Parts Notation and Coding Reference Guide

To ensure proper ordering and track revision changes across production runs, the manual incorporates official Komatsu engineering code designations within each parts list. Technicians and parts specialists should refer to these standard codes when procuring components:

• A1: Interchangeable part. This part and the part specified in the line immediately above can be used interchangeably.
• A2: Upward substitution. The part specified in the line above can be used instead of this listed part.
• A3: Downward substitution. This part can be used instead of the part specified in the line immediately above.
• A4: Matched set replacement. The part specified in the description column can be substituted for this part only when installed as a complete matching set.
• B1: Discontinued component. Production has ceased; the part listed in the line immediately above is supplied in its place.
• B2: Discontinued assembly. Succeeded by the parts package or component set detailed in the description column.
• C1: Non-serviceable individually. Not supplied as a separate piece; available only as part of an assembly.
• C2: Distributor-restricted assembly. Supplied exclusively through authorized Komatsu distributor channels as a sub-unit.
• C3: Semi-finished component. Requires secondary field machining, drilling, or preparation prior to final installation.
• Kit: Denotes parts supplied within dedicated field overhaul service packages (referenced in Section Y0).
• AR: As Required. Indicates bulk or non-fixed quantities ordered according to field service requirements.
• Dot Notation (. / .. / …): Establishes component relationships. A single dot (.) indicates a component part of an assembly; a double dot (..) indicates a sub-component within that component.

Professional Maintenance Capability and Instant Digital Delivery

Using the Komatsu WA380-8 Wheel Loader Parts Book Manual – Serial No H65051 and up (VENPB48000) guarantees that you order the precise part numbers intended by factory engineers, avoiding expensive delays and equipment mismatch. Whether you are conducting routine filter maintenance, rebuilding a hydraulic cylinder, repinning the front loader linkage, or undertaking a major powertrain overhaul, this manual provides the accurate part numbers, supersession codes, and visual schematics necessary to complete the job correctly.

This manual is supplied as an instant PDF download immediately upon checkout. There are no shipping delays or physical handling fees. The PDF file is fully compatible with Windows, macOS, Linux, Android, and iOS devices. It can be viewed on workshop computers, carried into the field on tablets and laptops, or printed out in high resolution for benchtop reference during teardown and reassembly.