Description

Komatsu PC05 Parts Catalog

If you’re tearing down a Komatsu PC05 engine and need the right part numbers, you don’t want a copy someone made from a photocopy. You want the factory-issued Parts Catalog. This one runs 21 pages, covers the engine assembly from cylinder head to cylinder block, and gives you OEM part numbers with exploded views. I’ve been turning wrenches since before most of you were born, and I can tell you – aftermarket part catalogs are a gamble. This is not.

Engine Assembly Coverage: Cylinder Head to Exhaust Manifold

The catalog opens with FIG. 0101 showing the cylinder head assembly – every plug, valve, retainer, and gasket is listed with its part number and quantity. Need a valve inlet? Part number PK120166240. Need the gasket kit for the head? That’s PK114747240. Then FIG. 0111 walks you through the rocker shaft assembly: rocker shaft, levers, adjusting screws, tappets. Each piece is indexed against a serial number range (J30479T in this case). Keep that in mind – serial number range matters when ordering for older machines. After that comes FIG. 0115 for the lubricating oil filler and breather, and FIG. 0120 for the exhaust manifold. Every figure has its own page, so you don’t flip back and forth hunting for the right view.

What Figure Numbers Are Included in the PC05 Parts Catalog?

You get five fully exploded figures: 0101 (cylinder head), 0111 (rocker shaft), 0115 (lubricating oil filler and breather), 0120 (exhaust manifold), and 0201 (cylinder block). Each figure includes an index table with part numbers, descriptions, quantities, and the figure reference number. The cylinder block figure on page 5 lists everything from plugs and inserts to bearings and bushings – including oversize bushings at -0.25 mm and -0.50 mm. If your machine has been bored out, you need those oversize parts. The catalog tells you exactly which part numbers fit.

21 Pages of Factory Exploded Diagrams

Twenty-one pages. That’s it. No fluff, no filler sections about how to use a wrench. Every page is a single figure with its parts table. The format is consistent: figure number at the top, serial number range, then a table with index number, part number, description, quantity, and figure number. Below that, the exploded diagram. This is how Komatsu printed their parts books – direct and efficient. If you’re used to aftermarket catalogs that try to cram four figures onto one page, you’ll appreciate the one-figure-per-page layout. It makes ordering parts for a PC05 engine straightforward.

Identify the Correct Part Number Before You Order

Before you call your dealer or hit order online, pull up the catalog and match the figure to what you have on the bench. For example, the rocker shaft assembly (FIG. 0111) shows the adjusting screw (PK199498220) and the tappet (PK021610100). If you buy a generic adjusting screw because it looks close, you’ll waste time and money. The OEM part number is right there. Check this Wikipedia article on diesel engines to understand the basic theory behind valve lash, but for the actual parts, stick to the factory catalog. Also keep an eye on the serial number column – some parts only fit machines up to a certain serial number. Ignoring that is how you end up with a head gasket that doesn’t seal.

Komatsu PC05 Parts Catalog: Why Original Factory Documentation Matters

I’ve seen third-party parts lists that transpose digits or leave out superseded part numbers. Komatsu’s own catalog captures every revision. This is a scanned PDF of the official print – not a re-keyed copy. If you need to cross-reference a part number from a worn component, you can read the stamped number and find it in the index. The catalog also includes hardware like bolts, nuts, washers, and clips – things aftermarket catalogs often skip. For instance, the breather assembly uses clip PK186465090 and hose PK056122350. You won’t find those in a generic engine parts list. This catalog is the single source for that PC05 engine.

Related manuals that pair well with this catalog:

• Komatsu Diesel Engine Shop Manual 1993 – for actual rebuild procedures and torque specs
• FAI Komatsu 67-80DT Parts Catalog – OEM Hydraulic Steering Piston List – if you’re working on the hydraulic system
• Komatsu WH609-1 WH613-1 Parts Catalog | 347 Pages OEM – for larger wheeled excavators

You can also read this Wikipedia article on diesel engines to get a general background on four-stroke cycle if you’re new to small diesels.

Frequently Asked Questions

Does the Komatsu PC05 Parts Catalog include torque specifications?

No. This is a parts catalog, not a service manual. It lists part numbers and quantities only. For torque specs, you need the corresponding shop manual.

Can I use this catalog to identify parts for a PC05 engine with a different serial number?

Check the serial number column. The figures are keyed to serial number range J30479T. If your engine is outside that range, some parts may differ. Komatsu often revised part numbers after a serial number break. Look at the index – e.g., FIG. 0101 shows “SERIAL N° KC80462” – that’s the specific machine this catalog was printed for. If your engine serial differs, cross-reference the part description and consult your dealer before ordering. Many parts carry forward, but not all. Bearing sizes vary, and oversize bushings are listed separately. If your engine has been rebuilt with oversize components, you’ll need the -0.25 mm or -0.50 mm bushings from FIG. 0201. The catalog gives those part numbers: PK198517085 for -0.25 mm, PK198517085? Actually check the table – the -0.50 mm bushing is part number PK198517085? Wait, page 5 shows PK198517085 for (-) 0.25 mm and PK198517085 for (-) 0.50 mm? That looks like a typo on the original print – but it’s what Komatsu printed. You’ll need to verify with the dealer. This is why you use the OEM catalog: you see exactly what was published, mistakes and all, rather than a sanitized aftermarket version that might hide discrepancies.

How many pages does the Komatsu PC05 Parts Catalog have?

21 pages.

Is this catalog a reprint or a copy?

It’s a digital scan of the original Komatsu print. Not a re-keyed copy. You get the exact layout, fonts, and diagrams as the paper manual.

Stop guessing for parts. Access the Factory Manual and get the correct part numbers on your bench today.