Description

Clark-hurth 280 III A Parts Catalog – OEM Factory Manual

If you are rebuilding a Michigan 280 III A articulated tractor dozer and you are chasing part numbers from a blurry online scan, you are burning cash. I have seen guys order the wrong seal, wrong bearing, wrong everything because they trusted a third-party parts list. That stops here. This is the Clark-hurth 280 III A Parts Catalog – the actual OEM publication Clark Equipment printed for dealer parts counters. 370 pages of exploded diagrams, part numbers, and the original warranty language that tells you exactly what Clark expected from their parts.

Why You Need This Specific Parts Catalog

Every dozer is different. The 280 III A uses a specific driveline, specific hydraulic pump mount, specific final drive components. Aftermarket catalogs blur multiple serial number breaks into one generic list. This manual covers the serial number range 8AMG101 and up – that is the exact cut-over point for the G.M. engine version. I have seen aftermarket books list a part that does not fit above that serial number. With this catalog you get the right illustration for your machine, not a composite drawing that makes you guess which bolt is yours.

Warranty and Improvements: What You Need to Know

The first pages of this manual reprint the original Clark warranty. That is not filler – it tells you the 6-month/1,000-hour limitation and the fact that Clark reserved the right to improve the design without retrofitting older machines. When you are ordering parts, the improvement clause explains why certain later superseded part numbers exist. The manual also includes the parts list sections for the front axle, transmission, and engine dressings. Page 5 references part numbers like 2513351 and 2513628 – those are the Clark and Michigan logos used on the machine. You need that level of detail to order the correct decal set.

How to Use the 370-Page Parts Breakdown

Each major assembly gets its own section: power train, hydraulics, steering, cab and sheet metal. The exploded views are line drawings with callouts tied to a numbered table. Handy trick – fold the page so you can see the table and the drawing side by side. The manual does not give you torque specs (that is the service manual job), but it gives you the quantity and type of fasteners. For example, if you need the O-ring for the steering control valve, the parts list shows the correct Clark number and the size. Do not rely on a generic O-ring kit – the factory tolerances for hydraulic seals matter on a 40,000 lb dozer. For other Clark equipment, see the Clark-hurth 280 III A Parts Catalog – OEM Factory Manual, 254 Pages and the Clark-hurth L320 1991 Parts Catalog – 690 Pages OEM Specs. For a smaller machine, the Clark-hurth 85III 1965 Parts Catalog – Factory OEM Specs applies.

Serial Number Verification – First Step

Before you order anything, write down the machine serial number. The manual states it applies to 280 III A G.M. 8AMG101 and up. If your machine is older than that, you need the earlier parts catalog. Clark changed the bell housing and the torque converter mounting after that serial break. I have seen guys bolt a later torque converter to the old block and crack the adapter. Check the serial plate on the left side of the frame near the hydraulic tank. If the number is missing, the manual includes a blank line on page 1 for you to record it – do it now.

Does This Manual Cover the Dozer Blade and Hydraulics?

Yes. The manual includes the blade lift cylinders, tilt cylinders, and all control valves. It also covers the articulation joint and the cab enclosure parts. If you need the part number for the steering column boot or the operator seat cushion, it is in here. The hydraulic system section lists every seal, hose, and fitting. For background on how internal combustion engines work, the Internal Combustion Engine article gives context, but this catalog is your procurement tool. The Automotive Industry Overview references broader trends, but for a Michigan dozer, stick with the OEM source.

FAQ

Can I use this manual to find part numbers for a 280 III A with a Cummins engine?

No. This catalog is for the G.M. engine version only. If your machine has a Cummins, you need the Cummins parts list or a later edition.

What is the difference between this OEM catalog and a generic aftermarket parts book?

The aftermarket book will list a single part number for a bearing that Clark superseded three times over the production run. This OEM catalog shows every supersession and the serial number break where the change happened. You also get the original Clark parts list layout with the correct callout numbers. If you order a part from the aftermarket book and it does not fit, you eat the return shipping. With the OEM catalog, you order the exact piece Clark intended for your machine serial number. In one case I had a customer buy a final drive seal from a third-party source – the seal was the correct O.D. but the wrong lip angle. The OEM catalog gave the correct Clark number, we matched it, and the leak stopped. That is the difference between a paperweight and a working machine.

Stop gambling on parts. Get the factory numbers, the correct illustrations, and the warranty language that protects you. Access the Factory Manual now and keep your dozer moving dirt.