Description

Clark-hurth 280, 460C, 460D 1978 Parts Catalog: What You Actually Need

I’ve been turning wrenches for 28 years, and nothing wastes time faster than ordering the wrong part because you trusted a sketchy aftermarket cross-reference. This Clark-hurth 280, 460C, 460D 1978 Parts Catalog is the original factory document—242 pages of part numbers, exploded views, and warranty language that actually came with the machine when it left the factory. If you’re rebuilding a Michigan 280 IIIA dozer or chasing down a hydraulic leak on a 460C, this is the only source that gets the numbers right.

Page 1 tells you exactly which serial numbers this covers: G.M.-460C and G.M.-460D. Write yours in the blank provided—any tech who skips that step deserves the headache of finding out his axle housing doesn’t match. The catalog uses an alphabetical index, from “Air Reservoir” straight through to “Axle Planet Carrier Assembly.” There’s no guesswork about which part fits which serial range.

Alphabetical Index Structure: How to Find Parts Fast

The table of contents is a straight alphabetical list—no cryptic group numbers to decode. Need the air brake pedal assembly? Look under “A” and you’ll find it on the page listed. Each entry points to a specific section, like 1B2 for the air reservoir or 1A24 for the brake chamber. The logic is simple: look up the component, flip to that page, and you’ll see an exploded diagram with every part numbered. No flipping through unrelated sections.

This is a parts catalog, not a service manual. It won’t tell you how to rebuild the transmission, but it will give you the exact part number for the clutch pack or the seal kit. For that, you need a separate service manual—check out the Clark-hurth L320 1991 Parts Catalog – 690 Pages OEM Specs”> related L320 catalog if you’re jumping between models.

Axle Assemblies Front and Rear: OEM Part Number Accuracy

The front axle assembly (section 1A8) and rear axle assembly (1A10) are documented with individual part callouts. If you’re tearing down a limited-slip differential, the differential carrier assembly for the front axle is listed under 1A12, and the rear under 1A14. Each gear, bearing, and shim has a separate part number. I’ve seen guys try to substitute a generic bearing—then wonder why the pinion depth is off. Stick with the factory number from this catalog.

One thing that catches people: the axle planet carrier assembly is listed under 1A15. That’s a separate page from the axle itself. If you order a carrier without checking the serial number suffix, you might get one for a 460D when you have a 460C. The catalog breaks those out clearly—don’t skip that step.

Air Brake System: Valves, Lines, and Chambers

The air brake system takes up several sections: air reservoir (1B2), air brake pedal (1B6), air brake valve (1H8), brake chamber (1A24), and air lines (1B2 again for the lines). Each component has its own exploded view with hose routing and fitting sizes. If you’ve ever tried to match a JIC fitting by eye, you know why this matters. The brake chamber diagram shows the diaphragm, pushrod, and return spring with the correct hardware torque specs? No—this is a parts catalog, so it only shows the part numbers. For torque values, you’ll need the service manual for that specific machine.

Engine Accessories and Support: Alternator, Compressor, and More

Section 1C23 covers the alternator and belt, the air compressor, and engine accessories. The alternator kit (1H22) and the auxiliary light kit for ROPS cab (1H24) are also listed. If you’re chasing a charging issue on a 460D, the alternator part number is there, along with the belt cross-section. But again—this is a parts catalog. It won’t diagnose a dead diode. For understanding how the alternator interacts with the rest of the electrical system, the Internal Combustion Engine”> basics of internal combustion engine support systems can help, but the part number is right here.

Warranty and Legal: What the Factory Covers

Pages 2-3 reproduce the original CLARK warranty. It’s six months from first use, covers parts and labor for defective materials, but excludes abuse, accident, and normal maintenance items. The catalog includes this because the part numbers tie back to warranty claims—if you’re doing a warranty repair, you need the exact factory number to get reimbursed. Aftermarket copies often strip out the warranty pages. This is the real deal.

If you work on multiple Clark-hurth machines, the Clark-hurth 85III 1965 Parts Catalog – Factory OEM Specs”> older 85III catalog and the Clark-hurth 85A, 85A1 1978 Parts Catalog – OEM Factory Specs”> 85A series catalog cover other popular dozer models. Having the right catalog for each machine eliminates the temptation to swap parts between models that look the same but aren’t.

FAQ

Is this the same as a repair manual?

No. This is strictly a parts catalog for ordering correct components.

What serial numbers are covered?

It covers G.M.-460C and G.M.-460D serial numbers for the Michigan 280 IIIA tractor dozer. Page 1 has a blank to record your machine’s serial number. If you have a 280 without the “IIIA” suffix, or a different prefix like G.M.-460B, this catalog may not apply. Always verify your serial number against the range. The catalog’s alphabetical index breaks down parts by component, but each component’s applicability is tied to those serial numbers. For example, the front axle assembly (1A8) may have different part numbers for early vs. late 460C production. Cross-referencing the part number with your serial number is essential—skipping that step can cost you days of downtime and a return shipping fee.

Can I use this catalog to find parts for my 460C dozer?

Yes, if your 460C serial number falls within the G.M.-460C range listed on page 1. The catalog groups parts for both 460C and 460D, with notes where they differ.

Does it include aftermarket parts?

No. Only original Clark-hurth part numbers. That’s the point—no aftermarket substitutions.

If you’re tired of playing part-number roulette with generic cross-reference guides, this is the document that ends the game. 242 pages of factory-sourced numbers, direct from the 1978 archive, printed when these machines were still on the assembly line. Access the Factory Manual and keep it on your bench—your parts counter guy will thank you.