Komatsu WA320-5 Parts Book KEPB001402 – Wheel Loader Illustrated Parts Catalog PDF (S/N B10001 & Up, Engine SAA6D102E-2)

Description

Komatsu WA320-5 Parts Book KEPB001402 — Illustrated Parts Catalog for Wheel Loader S/N B10001 and Up

The Komatsu WA320-5 Parts Book (document number KEPB001402) is the complete illustrated parts catalog for the WA320-5 wheel loader starting from serial number B10001 and up, equipped with the SAA6D102E-2 engine (engine serial number 26339177 and up). This is not a generic aftermarket reference — it is the same structured parts breakdown used to identify, order, and verify every component on the machine, organized the way the factory designed it: by system, by assembly, and by callout number.

With approximately 439 pages, this parts book covers every major assembly on the WA320-5. Each section pairs an exploded-view illustration with a detailed parts list showing item numbers, part numbers, descriptions, quantities, and the serial number ranges that determine applicability. Whether you are rebuilding a cylinder, replacing a hydraulic pump, tracking down a discontinued part, or simply confirming the correct fastener for a specific assembly, this catalog gives you the authoritative answer.

File Details

• Manual Type: Parts Book (Illustrated Parts Catalog)
• Brand: Komatsu
• Model: WA320-5 Wheel Loader
• Serial Number: B10001 and up
• Engine: SAA6D102E-2
• Engine Serial Number: 26339177 and up
• Document Number: KEPB001402
• Language: English
• Page Count: Approximately 439 pages
• File Format: PDF

Chapters Covered

• Engine
• Engine Related Parts
• Cooling System
• Fuel Tank and Related Parts
• Electrical System
• Transmission
• Hydraulic System
• Suspension and Wheel Related Parts
• Work Equipment
• Numerical Index

Engine

The engine section is the largest portion of the catalog, covering the SAA6D102E-2 in complete assembly breakdown. It includes the cylinder head, cylinder block, front cover, flywheel, tappet, front gear train cover, oil pan (including cold-terrain and standard variants), oil level gauge, oil cooler and oil filter assembly, turbocharger and turbocharger oil piping, thermostat and thermostat housing, water pump, water connector, fuel injection pump and mounting, fuel filter piping, fuel return parts, and engine mount. Each assembly is shown as an exploded illustration with every individual part — bolts, washers, gaskets, O-rings, seals, bearings, and castings — called out and matched to a part number. Serial number options are clearly noted so you can confirm whether a given part number applies to your specific machine.

Engine Related Parts

This section covers the components that bolt to or support the engine: the stop solenoid and its linkage, the engine mount brackets and cushions, the damper and coupling, and the associated hardware. The exploded views make it straightforward to identify the correct spacer, washer, or bushing when re-assembling or ordering replacement mounts.

Cooling System

The cooling system section covers the radiator mount, radiator piping, and the related brackets, cushions, and hardware. The exploded diagrams show how the radiator, hoses, and mounting components fit together, including the shims and spacers used to set correct alignment. This is useful when replacing a radiator, repairing a leak, or renewing worn cushions.

Fuel Tank and Related Parts

This section details the fuel tank assembly and its mounting hardware, along with the water separator and its piping. The parts lists identify the correct clips, hoses, and joints for the fuel system, making it easy to order replacement components without guesswork.

Electrical System

The electrical section covers the battery and its hold-downs, the rear combination lamp and number plate, the rear harness and wiring clips, the horn and its mounting, and associated relays and connectors. The exploded views show how the harness is routed and secured, which is particularly helpful when tracing a wiring fault or replacing a damaged lamp assembly.

Transmission

The transmission section covers the HST oil lines, transmission oil filter and transfer lines, and the related brackets, clamps, and cushions. The parts lists include the O-rings, flanges, and bolts needed for line replacement or repair, with serial number options noted where applicable.

Hydraulic System

The hydraulic system is one of the most detailed sections in the catalog. It covers the main valve (including the 3-spool valve variant), steering valve, steering demand valve, emergency steering sensor line, hydraulic pump and pump mounting, fan drive and fan drive piping, and the full hydraulic piping system — main lines, return lines, lift cylinder lines, dump cylinder lines, PPC piping, boom piping, and cut-off valve. Each hose, tube, flange, O-ring, and elbow is called out with its part number and quantity. The control valve and PPC valve inner parts sections provide exploded views of the valve assemblies themselves, which is invaluable when diagnosing a spool issue or ordering internal valve components.

Suspension and Wheel Related Parts

This section covers the rim (for 20.5-25 tubeless tire), tire options, front axle and rear axle assemblies, differential, brake components, axle support, and remote grease lines. The rear axle sections include the differential inner parts and brake assembly, with every gear, bearing, seal, and plate identified. The front axle section covers the slack adjuster mounting and differential components.

Work Equipment

The work equipment section covers the lift arm and bellcrank assembly, bucket (3.0 m³ with B.O.C. 3.2 m³), bolt-on cutting edge, tooth (tip type) assembly, lift cylinder, and bucket cylinder. Each cylinder is shown in exploded view with its internal components — rod, piston, seals, packings, bushings, and valves — so you can order individual internal parts rather than replacing the entire cylinder. The bucket and cutting edge sections include the bolts, nuts, and washers needed for edge replacement.

Numerical Index

The catalog closes with a comprehensive numerical index that lists every part number in the book alongside its figure number and page reference. This is the fastest way to look up a part number you already have and find exactly where it belongs on the machine.

Why This Parts Book Matters

Ordering the wrong part for a wheel loader is expensive — not just the part itself, but the downtime while you wait for the correct one to arrive. A parts book removes that risk. The Komatsu WA320-5 parts catalog gives you the exact part number for your serial number range, confirms the quantity required, and shows you where each component fits before you turn a wrench. For anyone maintaining, repairing, or restoring a WA320-5, this is the reference that keeps the job moving.

Whether you are a shop technician, a fleet maintenance manager, or an owner-operator handling your own repairs, having the illustrated parts breakdown on hand means you can identify components visually, cross-reference part numbers, and place accurate orders the first time. The serial number ranges printed throughout the catalog ensure you are looking at the right variant for your machine — something generic aftermarket parts lists cannot offer.

This Komatsu WA320-5 parts book PDF is delivered instantly after purchase. There is no shipping, no waiting for a physical book to arrive, and no risk of a damaged or incomplete paper copy. You can open it on a laptop in the shop, pull it up on a tablet at the machine, or print the specific pages you need for the job at hand. The PDF format makes it easy to zoom in on exploded views, search part numbers, and share specific pages with your parts supplier. If you work on a WA320-5, this catalog belongs in your digital toolbox.

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