Komatsu WA320-5 Wheel Loader Parts Catalog – Serial B10001 and Up PDF Download

Description

This Komatsu WA320-5 Parts Catalog covers wheel loaders from serial number B10001 and up, delivering the full illustrated parts breakdown for the machine. Every major assembly is shown as an exploded diagram with numbered callouts that tie directly to a parts table listing part number, description, quantity and serial applicability. Whether you are ordering a replacement seal, chasing a bracket, or verifying which alternator variant fits a specific serial break, this catalog gives you the exact information in one place.

File Details

• Manual Type: Illustrated Parts Catalog
• Brand: Komatsu
• Model: WA320-5 Wheel Loader
• Serial Range: B10001 and Up
• Engine: SAA6D102E-2 (S/N 30380718-UP)
• Language: English (diagram callouts include Japanese)
• Page Count: 471
• File Format: PDF

Chapters Covered

• Engine Related Parts — Air Cleaner (standard and sugar cane deflector version), Front Hanger, Fuel Return Related Parts, Heat Shield, Alternator Cover, Muffler and Mounting, Stop Solenoid, Alternator (60A) and Inner Parts, Starting Motor (5.5kW) and Inner Parts, Engine Mount, Engine Harness (1/2 and 2/2), Water Temperature Sensor, Exhaust Pipe, Damper
• Cooling System — Radiator, Radiator Mount, Radiator (Sugar Cane) Supply Parts, Fan Drive, Transfer Oil Cooler, Cooling Line
• Fuel Tank and Related Parts — Fuel Tank, Water Separator
• Electrical System — Battery, Battery Box, Rear Combination Lamp and Number Plate, Front Harness, KOMTRAX, Rear Harness (Main, Relay/Fuse/Sub, HST, Plug, Switch Mounting), Front Light, Horn
• Transmission — Transfer (Case, Clutch Housing, Gear, Output, Brake), HST Pump, HST Oil Line (Charge, Main, Filter/Transfer, Pump Drain, Quick Coupler), Drive Shaft (Front and Rear), Transfer Mount
• Hydraulic System — Hydraulic Tank, Main Valve, Steering Valve and Piping, Steering Demand Valve, Emergency Steering Sensor Line, Hydraulic Pump, Fan Drive and Piping, Hydraulic Piping (Main, Return, Piping Mount, Cut-off, Dump/Lift Cylinder Lines, Bypass, P.P.C., Boom, Hose, E.C.S.S. Valve, Steering Line)
• Main / Revolving Frame and Related Parts — Front Frame, Rear Frame, Hinge Pin, Steering Cylinder, Bar Lock and Cover, Rear Axle Support, Remote Grease
• Operator’s Compartment and Control System — Operator’s Seat (Suspension, Fabric Type), Seat Belt, Air Conditioner Duct (Front and Floor), Floor assemblies (Console Box, Cover, Air Conditioner, Loader Control, Brake/Inching, HST Controller, Heater Piping, Electrical, Harness, Main Monitor), ROPS Cab (Body/Glass, Roof Pad, Wiper, Sheet/Cover, Door L.H., Door R.H., Stopper, Mark, Cover), Floor Mat, Window Washer, Air Conditioner, Heater Piping, Radio, Floor Support, Auto-Reverse Fan Control, Gauge and Sensor, Engine Control, Inching Control, Brake Control, Charge Valve, Brake Piping, Bucket Positioner
• Guard — Hood, Hood Bulk Head, Hood Door, Radiator Guard, Hood Sheet, Duct Cover, Hood Mounting, Cover and Striker, Cap, Pre-Cleaner, Radiator Piping and Baffle Place, Duct Sheet, Rear Fender, Front Fender, Floor Cover, Ladder, Mirror, Counter Weight
• Suspension and Wheel Related Parts — Rim (20.5-25 Tubeless), Tire options (20.5-25-12PR-L3, 20.5-25-16PR-L3, 20.5-25-L2, 20.5R25-L3)
• Work Equipment — Lift Arm and Bellcrank, Boom Kick Out, Bucket, Bolt-On Cutting Edge, Segment Edge, Tooth (Tip Type), Lift Cylinder, Bucket Cylinder
• Marks and Plates, Floor Decals, Accessory and Tool, Service Kit and Component Parts (Pump, Torque Converter, Cylinders, Motor, Control Valve, PPC Valve, Cut-Off Valve, Air Conditioner Unit)

This Komatsu WA320-5 Parts Catalog is a complete illustrated parts reference, not a partial subset. It walks through the machine system by system — from the engine air cleaner and 60A alternator all the way down to the pilot valves, cylinder seal kits and axle housing internals. Each diagram uses numbered references that map to a table showing the correct part number, description, quantity required, and — where the part changed over the production run — the serial number break at which each version applies. That serial-break detail is what makes this catalog genuinely useful: sugar cane variants, 2-lever vs 3-lever vs mono-lever console configurations, and mono + 1-attachment lever setups each have their own parts tables, so you can tell which parts apply to the exact machine in front of you rather than guessing from a generic diagram.

What You Can Do With This Catalog

Parts identification on the WA320-5 wheel loader is the primary job this catalog handles. Use it to look up hydraulic hoses and fittings by position, match O-rings and seal kits to the correct cylinder, find the right fan drive or radiator mount cushion, or confirm which rear combination lamp and grommet set belongs to your serial range. The exploded views also make assembly order obvious when you are rebuilding a transfer clutch housing, a rear axle brake, or the steering demand valve — each stack of shims, discs, plates, springs and O-rings is laid out in sequence with item numbers so nothing gets missed. Hose routing sections for the HST oil lines, cooling lines and hydraulic main/return lines show every clip, cushion, flange and bolt used along the path, which is helpful when re-plumbing after a repair.

How the Parts Data Is Organised

The catalog follows Komatsu’s standard grouping convention. Each section header carries a page number, and each diagram is labelled with a reference code such as B0000-01A0 or Y1610-01A0. Beneath the diagram, a two-column table lists the item number (matching the callout on the illustration), the part number, the description, the required quantity, and any serial-number conditions. Notes such as ‘SN:B10001-‘ indicate that the part applies from that serial onward; ‘SN:B10001-B10062’ indicates a closed range. Optional and sugar-cane-only sections are flagged in the section title with the applicable serial prefix, for example (#B10235-) or (#B10186-). This structure means you can work backwards from a callout number on the diagram to a concrete part number in a few seconds, or work forwards from a known part number by scanning the tables.

Why Correct Part Numbers Matter on the WA320-5

The WA320-5 went through several running changes across the B10001-and-up serial range: alternator output rating, starting motor internal components, hood and radiator guard updates, seat suspension hardware, and console box lever configurations are just some of the areas that shifted. Fitting a superseded part because you used a generic listing can cause fitment problems, hydraulic leaks, or electrical faults. This Komatsu WA320-5 Parts Catalog keeps the serial-break information visible on the same page as the diagram, so you order the version that actually belongs to your machine. It is equally useful for anyone maintaining a mixed fleet where several WA320-5 units sit on either side of a serial break.

IMAGES PREVIEW

Instant PDF Delivery

This Komatsu WA320-5 parts catalog is supplied as an instant-download PDF. There is no shipping, no waiting for a printed binder, and no risk of a missing page. Once payment is complete, the file is available to open on any device — workshop PC, laptop, tablet or phone — and you can print the pages you need for the job at hand. Keep the full 471-page document on file for quick searches, or print the specific assembly diagrams and parts tables for the repair you are doing today. Either way, the correct parts information for your WA320-5 wheel loader is in your hands the moment you download.