Description

Clark-hurth 55 III A Parts Catalog – OEM Factory Specs for Michigan Wheel Loader

If you’ve ever ordered a part for a Clark-hurth 55 III A wheel loader and ended up with a box that doesn’t match the hole you’re staring at, you already know why this catalog matters. I’ve seen guys spend half a day chasing the wrong bearing because they trusted an aftermarket parts list. This is the factory catalog – the same 244 pages the Clark dealer used. No guesswork. No aftermarket interpretations. Just the OEM part numbers, exploded diagrams, and the breakdown groups that match what came off the production line. If you’re maintaining a Michigan loader, you need this on your bench.

Parts Catalog vs Repair Manual – What You’re Getting

This is a parts catalog, not a service manual. That means you won’t find torque sequences or adjustment procedures here. What you get is a complete parts breakdown of the Clark-hurth 55 III A – every nut, seal, gear, and bracket listed with its Clark factory part number. The index is alphabetical by group. Need the brake air valve? Look under “Air Valve, Brake” on group 1H5. Need the planet carrier for the axle? Group 1A13. The catalog is arranged in groups A through V for standard equipment, with a Z group for optional items at the back. If you don’t have a parts catalog to cross-reference, you’re ordering blind.

Brake System Components – Part Numbers You Can Trust

The brake system on a 55 III A includes the Brake Air Valve (1H5), Brake Assembly – Parking (1B11), Brake Controls (1B12), Brake Head Assembly (1B14), and the Emergency Brake System (1J14). Each group shows an exploded view with callouts. If you need to replace the brake head, turn to page 1B14. The diagram shows every seal, piston, and spring with the correct part number. Don’t trust aftermarket catalogs that substitute a generic O-ring. This catalog lists the exact Clark seal dimensions. You’ll also find the Brake Air Lines (1A20) and the Brake Power Cluster Assembly (1B17).

Engine and Accessories – Group 1015

Engine and Accessories are covered starting on page 1015. That section includes the Alternator & Belt, Air Cleaner, Alcohol Injector, and the Engine Controls on page 1022. The Accelerator Pedal & Linkage is also there. If you’re ordering a replacement air cleaner element or an alternator belt, the part numbers are listed with the correct dimensions. Don’t rely on a local parts store lookup – they might give you a belt that’s 1/2″ too short. Use the factory number from this catalog.

Air Valve and Hydraulic Control Valve Groups

Multiple valve groups are detailed: Air Valve, Brake (1H5), Air Valve, Bucket leveler (1H6), Main Hydraulic Control Valve – 2 Spool (1H8), and Main Hydraulic Control Valve – 3 Spool (1K8). The catalog also covers the Control Valve, Transmission (1G21) and its linkage (1G20). If you have a bucket leveler issue, check the Air Valve, Bucket leveler group. The diagrams show internal ports and spring configurations. You’ll also find the Bucket Cylinder Assembly (1C10) and Boom Cylinder Assembly (1C9). For the Side Dump attachment, there’s a dedicated section with bucket, cylinder, and clamp assemblies.

Why OEM Parts Catalog Beats Aftermarket Listings

Aftermarket parts catalogs often use generic numbers or combine multiple revisions. This one is printed by Clark Equipment for the Michigan 55 III A. The introduction on page 2 states: “To assure the best results and to maintain the original quality built into the machine it is important that only Clark-Approved Parts be used.” It also tells you to always furnish the machine serial number when ordering. That kind of specificity saves you from getting the wrong axle seal or a brake valve with a different port thread. You don’t want to be the guy holding a part that doesn’t fit and having the machine down another week.

Does This Catalog Cover the Transmission and Axle?

Yes. The transmission is covered under groups like Converter Assembly (1C2), Clutch Cover (1G16), Clutch Group (1G17), and the Transmission Control Levers & Linkage (1G20). Axle assemblies are separate: Front Axle Assembly (1A6), Rear Axle Assembly (1A8), Axle Differential & Carrier Assembly Front (1A10) and Rear (1A12), plus Axle Planet Carrier Assembly (1A13). If you need to rebuild a differential, you’ll find the ring gear, pinion, bearings, and shims listed with part numbers. But remember: this catalog gives you the parts, not the rebuild procedure. For that you need the service manual, which you can find in our Clark-hurth L320 1991 Parts Catalog – 690 Pages OEM Specs or other model-specific manuals. Also check the Clark-hurth 85III 1965 Parts Catalog – Factory OEM Specs if you have an older machine. For the 85A series, see Clark-hurth 85A, 85A1 1978 Parts Catalog – OEM Factory Specs.

For general background on heavy equipment parts management, see the Automotive Industry Overview and the Internal Combustion Engine article for engine basics.

Frequently Asked Questions

Can I use this parts catalog to rebuild my transmission?

No. This is a parts catalog – it lists the components but does not include assembly instructions or torque specs. You need a service repair manual for that.

What serial numbers does this catalog cover?

The catalog is for the Model 55 III A, but Clark explicitly states on page 2 that you must provide the machine serial number when ordering parts. The catalog includes standard equipment groups A through V and optional items in Group Z. Serial number ranges are not printed in this catalog; contact Clark or your distributor to confirm compatibility with your specific machine. Always verify before ordering.

Bottom line: If you are maintaining a Michigan 55 III A loader, the factory parts catalog is the only reliable source for correct part numbers. Don’t waste time with aftermarket guesses. Get the OEM document that the dealer uses. Access the Factory Manual now from AutoRepairManuals and have the correct part numbers at your fingertips.