Description

Komatsu WB97R-5 Parts Catalog – 871 Pages of Factory Specs

You know the drill: tear down a backhoe, find a cracked cylinder head, call the parts counter, and they ask for a part number you don’t have. Or worse – you order from an aftermarket diagram and get the wrong seal because someone redrew the figure from memory. I’ve been turning wrenches for 28 years, and that’s exactly why this Komatsu WB97R-5 Parts Catalog sits on my bench. It’s 871 pages of factory-issued part numbers, exploded views, and serial-number breaks. If you’re rebuilding a WB97R-5 with S/N F50003-Up, you don’t guess – you look it up.

Engine Section: Cylinder Head, Block, and Crankshaft

Section A gets into the meat of the 4-cylinder diesel. You get exploded diagrams for the cylinder head (1/2 and 2/2), head covers, intake and exhaust manifolds, the block, gear housing, front cover, oil sump, flywheel housing, camshaft and driving gear, crankshaft, and piston assemblies. Each figure like 0101 and 0103 shows you exactly which bolt, valve, spring, or seat belongs where. The part numbers are listed with serial number breaks – not generic numbers that fit three different models. If you need a suction valve seat (EA4897179) or the head assembly itself (EA4897178), this catalog pinpoints it.

Don’t try to rebuild a cylinder head without the correct valve cone (EA4895183) quantity – there are 16 of them per head, and the aftermarket diagrams I’ve seen show 8. That’s the difference between a factory print and a copy.

Related manual: the Komatsu WB97R-5 Shop Manual has the torque specs and assembly steps.

Electrical and Engine-Related Parts: Generator and Starter

Section A1 covers engine-related parts and the electrical system. Figures 0601 and 0603 show the generator (two halves), and 0605/0609 cover the starter motor. If the starter on your WB97R-5 is dragging, you can order the exact armature or solenoid from the factory diagram instead of swapping the whole unit. The part numbers are tied to the serial number range, so you don’t end up with a starter that has the wrong nose cone.

Does This Catalog Cover the Hydraulic System and Work Equipment?

Yes. Section F covers the hydraulic system work equipment, and Section G covers the work equipment itself – boom, arm, bucket linkage. If you’re replacing a worn pin or bushing on the backhoe attachment, you’ll find it in those pages. The frame is in Section C, control system in D, and operator’s cab in E. Mark plate (serial number plate) details are in H. You get the whole machine, from the fuel injection pump (0431/0434) to the air conditioning compressor pulley (0517).

7 Major Sections Across 871 Pages

This catalog is not a condensed reprint. It runs 871 pages because every figure gets its own page with a full parts table. The table of contents lists eight sections: A (Engine), A1 (Engine Related & Electrical), C (Frame), D (Control System), E (Chassis and Operator’s Cab), F (Hydraulic System Work Equipment), G (Work Equipment), H (Mark Plate). Each section has multiple figures – over 40 engine figures alone. You get quantities, part numbers, and serial number applicability for every single item.

For a deeper understanding of how these systems work, check the Automotive Industry Overview and the Internal Combustion Engine page for basic theory.

Why OEM Parts Catalogs Beat Aftermarket

Aftermarket catalogs renumber parts, omit small seals and gaskets, and sometimes combine two figures into one blurry image. This one is a direct scan of the Komatsu factory print. You see the original part numbers, the original quantities, and the serial number breaks. No third-party reinterpretation. When I ordered a fuel injection nozzle for a WB97R-5 last month, the local supplier tried to sell me a generic. I pulled up this catalog, showed them the part number (EA4895187 for suction valve, but nozzle is different), and they found the correct Komatsu box. That’s the value of having the factory document.

Also check the FAI 67-80DT Hydraulic Steering Piston Parts List if you work on smaller equipment.

Audience Fit: Who Needs This Catalog?

If you’re a DIY mechanic or a small-shop owner with a Komatsu WB97R-5 backhoe-loader, this catalog is for you. You might not need it every day, but when you do a top-end rebuild or replace a hydraulic cylinder, you need the right parts. Beginners: this is not a repair manual – it won’t tell you how to remove the cylinder head. Pair it with the Komatsu WH609-1 WH613-1 Parts Catalog | 347 Pages OEM or the WB97R-5 shop manual for procedures.

What serial numbers does this catalog cover?

It covers S/N F50003-Up.

How many pages and sections?

871 pages across 8 sections: Engine, Engine Related & Electrical, Frame, Control System, Chassis & Cab, Hydraulic System Work Equipment, Work Equipment, and Mark Plate. Each section has multiple figures with exploded views and part numbers.

Can I use this to order parts from a dealer?

Yes. The part numbers are factory Komatsu numbers. Your dealer can cross-reference them. The catalog also shows quantities and serial number breaks, so you order exactly what the machine needs.

Does this include torque specs or repair procedures?

No. This is a parts catalog – it lists components, part numbers, and assemblies. For removal and installation steps, torque values, and clearances, you need the Komatsu shop manual. Many of us keep both on the bench.

You don’t have time to chase wrong part numbers. When you open this catalog, you see the same drawing the factory uses. Access the Factory Manual now and get 871 pages of Komatsu part data for your WB97R-5.