Description

Komatsu WA200-5 Parts Catalog

You need a bolt, a seal, a hose – but the parts counter gives you the wrong one. Then you wait, the machine sits, and the job goes sideways. That stops here. This is the factory Komatsu WA200-5 Parts Catalog, printed from the OEM source – not some aftermarket rehash that guesses at part numbers. 508 pages of exploded diagrams and numbered callouts. If you’ve ever had a loader down because someone ordered the wrong pump or misread a serial number prefix, you know exactly why this document exists. I’ve seen guys chase parts for three days because they used a third-party catalog that listed a discontinued part as current. Not on my watch.

ENGINE: Matching the SAA6D102E-2EE-8 Components

This catalog covers the SAA6D102E-2EE-8 diesel engine used in the WA200-5. Serial numbers 65001 and up. The ENGINE section (starts after the foreword) gives you every gasket, piston ring, injector, and seal with the correct Komatsu part number. Need a cylinder head bolt? The illustration shows you the exact location, the index number, and the part number. No guesswork. I’ve used parts books like this to cross-reference old seals with new revisions – saved me an engine rebuild once because the new part number superseded the old one and the book flagged it. Pay attention to the symbols: the box symbol means a substitute part exists. Page 2 shows the engine serial number breakdown – don’t skip it.

COOLING SYSTEM: Radiator, Hoses, and the Water Pump You Actually Need

Overheating a loader because you grabbed the wrong water pump? The COOLING SYSTEM section lays out the radiator, fan, thermostat housing, and all related pipes with quantities. Each part gets its own row: part number, description, quantity per machine. That fan shroud that cracks? You’ll find the exact plastic part number, not a generic replacement that needs modification. The symbols tell you if a part is discontinued and what supersedes it. That alone is worth the price of admission.

FUEL TANK AND RELATED PARTS

Fuel system parts are tricky – the tank itself, the filler neck, the strainer, the sending unit. This chapter lists every piece from the tank flange to the return line. If you’re replacing a fuel level sender, the illustration shows the float arm orientation. One tech I knew ordered a sender for a later model because the catalog he used didn’t list the serial number break. Two hours wasted. This catalog gives you the machine serial number right in the part row. Use it.

ELECTRICAL SYSTEM: Wiring Harnesses, Connectors, and Switches

Electrical gremlins in a wheel loader? Start with the ELECTRICAL SYSTEM section. It covers the main harness, battery cables, alternator, starter, and all the switches in the operator compartment. Each connector is drawn in the illustration – you can see the pin positions. When you need a specific relay, the part number is right there. I’ve seen aftermarket books list a generic relay that doesn’t have the same mounting tab. This one gives you the OEM part. For more background on how diesel electrical systems work, have a look at this Wikipedia article on diesel engines.

TRANSMISSION: Planetary Gears, Clutch Packs, and Shafts

The TRANSMISSION chapter covers the planetary drive, clutches, torque converter, and output shafts. Each gear, bearing, and seal is listed with its location on the exploded view. If you’re rebuilding a tranny, you’ll need the exact needle bearing part number – this catalog gives it. The quantities tell you how many of each bearing per machine. Don’t rely on a generic bearing catalog that substitutes dimensions – use the factory numbers.

SUSPENSION AND WHELL RELATED PARTS

Suspension on a wheel loader? Yes – the axle mounting brackets, pivot pins, bushings, and tires. This section includes the front and rear axle assemblies with all steering and suspension components. The spindle, kingpin, and seal part numbers are here. I’ve swapped out a bushing with the wrong ID because I trusted a cross-reference. This catalog gets it right.

Why OEM Beats Aftermarket for a Parts Catalog

Aftermarket parts catalogs often combine multiple models into one book, leaving out serial number breaks or using generic part numbers that don’t match Komatsu’s supersession chain. This is the real factory document – from Komatsu’s own publishing system. The page numbering, the illustration numbering (FIG. No.), and the symbols are all standard Komatsu parts book format. If you’ve ever tried to use a photocopy of a photocopy, you know the frustration of unreadable part numbers. This digital PDF is clean, searchable, and every page matches the original printed book. Related manuals you might need: Komatsu WA200-5, WA200PT-5 2011 Workshop Manual – 777 Pages of OEM Specs for repair procedures, and Komatsu WA200-5 Service Manual – 252 Pages Factory Specs for diagnostic flowcharts. Also check Komatsu WA200-5, WA200PT-5 2005 Workshop Manual – 774 Pages if your machine is an earlier build.

FAQ

Can I use this catalog to rebuild an engine?

No. This is a parts catalog – it shows you how to identify and order components, not how to disassemble or torque them. For assembly specs, get the workshop manual.

How do I know if a part is still available from Komatsu?

The catalog includes symbols that indicate discontinued parts and their substitutes – a square box means a replacement part exists. The part number column may also show supersession if the original is discontinued. However, availability changes over time; always check with your local Komatsu distributor using the part numbers from this book. The catalog is accurate as of its original printing, but serial number breaks and revision letters are included to help you verify fitment. If a part is listed as discontinued and no substitute appears, you’ll need to contact Komatsu or find an aftermarket equivalent – but at least you’ll have the correct dimensions to cross-reference. I recommend calling with the part number and your machine serial number (65001 and up for this WA200-5) – that’s the only way to get a definitive answer on stock status.

You are paying for precision. Every number in this catalog was printed by Komatsu to eliminate exactly the kind of part-ordering mess that costs you billable hours. If you are maintaining or restoring a WA200-5 wheel loader, you need this document on your tablet or printed out and taped to the workbench. Don’t trust a third-party PDF that might have scanned the wrong revision. Access the Factory Manual now and start ordering the right parts.