Description

Clark-hurth 55III 1980 Parts Catalog – Factory OEM Specs for the Model 55III

I’ve lost count of how many times a guy brings me a machine that’s been sidelined because someone ordered the wrong brake wheel cylinder or guessed at a seal number. That costs hours and cash. If you’re working on a Clark-hurth 55III, you need the actual factory Parts Catalog – not a reprint from a CD-rom that someone scanned sideways. This is the 1980 original, 222 pages of exploded diagrams and Clark-hurth part numbers. No cross-reference guessing.

Axle Assemblies and Planet Carriers – Front and Rear

Front axle assembly is found under grid 1B1, rear under 1B3. Each has its own illustration and part list. The differential carriers (1B7 front, 1B8 rear) and planet carriers (1B10 front, 1B11 rear) are broken out separately. If you’re rebuilding a wheel end, you need those planet carrier pages. The diagram shows every bearing, shim, and seal with a Clark part number. The planet carrier assembly exploded view includes the sun gear, planet gears, thrust washers, and the carrier itself. Each part has a numeric identifier that corresponds to the parts list on the adjacent page. This level of detail is what separates a real factory catalog from a generic aftermarket PDF. When you’re trying to order a specific needle bearing for the planet pinion, the aftermarket book will give you a vague dimension. This catalog gives you the Clark part number.

Brake Systems: From Foot Controls to Wheel Cylinders

Brake assemblies front and rear are on 1C1 and 1C2. The wheel cylinder for the front is grid 1C5, rear 1C6. Foot controls (1C8), main brake lines (1C10), and parking brake (1D1–1D3) are all here. If you have a dragging brake or a leaking wheel cylinder, you’ll find the exact seal kit number. No need to measure the bore and guess – the catalog tells you.

Engine Assembly and Mountings – 1F7 to 1F10

The Engine assembly (1F7) shows the long block with all attached components. Engine mountings are in 1F8 and 1F9. The oil pressure line routing is on 1F10. Parts like the air cleaner (1A9–1A11) and fuel system (1G3–1G8) are also covered. You can order a water pump or a gasket set using the factory numbers printed right there.

Hydraulic Lines and Steering – Front End Equipment

Hydraulic lines for the front end equipment are in 2A8–2A10. Steering lines are 2A11–2A12. The steering pump (2C7), steering gear (2D5–2D6), and drag link (2D4) are all detailed. If you’re chasing a leak in the steering circuit, the grid numbers match the machine layout. The hydraulic reservoir is 2B1.

Torque Converter and Transmission – 1E10 and 2A13

The torque converter assembly (1E10) has its own illustration. The hydraulic system for the transmission and converter is on 2A13–2A14. This is critical when sourcing a seal or a filter – the parts catalog gives you the correct OEM number.

Critical for seal and filter sourcing.

Source Authenticity: Why This Beats Aftermarket

This PDF is a direct scan of the original Clark-hurth internal parts manual. The inter-office memo on page 1 from Don Lape to John Thorpe confirms it’s the official 1980 stat for the 55III. Aftermarket catalogs often merge multiple model years or redact illustrations. Here, every grid has a TP illustration reference – some grids have “Yes” under Writing, meaning part numbers are printed. The index on page 3 lists each grid with its TP number and whether an illustration exists. You won’t get that from a generic source.

Who Needs This Manual

If you own a Clark-hurth 55III loader and do your own maintenance, this is the only parts reference you should trust. Shops that service these machines should have it on the bench. Parts counters that cross-reference late-model numbers will waste your time. This catalog eliminates the guesswork.

Related manuals: Clark-hurth L320 1991 Parts Catalog – 690 Pages OEM Specs and Clark-hurth 85III 1965 Parts Catalog – Factory OEM Specs and Clark-hurth 85A, 85A1 1978 Parts Catalog – OEM Factory Specs.

For background on the internal combustion engine, see Internal Combustion Engine. Also check the Automotive Industry Overview for context on Clark’s place in construction machinery.

Frequently Asked Questions

Does this cover the engine controls?

Yes, sections 1A5 and 1A6 show part numbers for throttle linkages.

How many pages?

222.

Are the diagrams clear?

Yes, each grid has a TP-numbered illustration. Some have writing (part numbers) only. The index on page 3 tells you exactly what each grid contains – whether there’s a drawing or a table. That’s useful when you’re trying to find a bracket and need to know if you’ll see a visual or just a list.

Can I use this for a 55III with a different year?

This is the 1980 Parts Catalog specifically for the 55III. Clark-hurth made changes between model years. Aftermarket catalogs might lump years together – that’s how you get the wrong part. Stick to the correct year.

Stop wasting time on returns and reorders. Access the Factory Manual and get the right part number the first time.