Allis-chalmers HD-6EP Parts Catalog – Factory OEM, 374 Pages

Let me tell you straight: if you’re working on an Allis-chalmers HD-6EP crawler tractor and you don’t have the factory parts catalog on your bench, you’re burning time and money. I’ve seen guys try to order seals or sprockets using aftermarket lists pulled off some forum. That’s how you end up with a box of wrong parts and a machine down for a week. This Parts Catalog is the real deal – 374 pages of OEM part numbers, exploded views, and serial number breaks for the HD-6EP (including dozers, TR6 Ripper, and hydraulic systems). It covers S/N 14484 through 22250 and 88Y22251-up.

I’ve been turning wrenches for twenty-eight years. When I see a parts catalog that’s a photocopy of a photocopy, I toss it. This one is a direct scan of the original Form 70698279 (replaces 70626160). It’s printed in English, Spanish, French, and Portuguese – which is handy if your shop works with bilingual crews. Every page is clear, no blurry numbers. You’ll find the exact part number for that injection pump seal on page 73. Trust me, that beats guessing.

Parts Breakdown – What’s Inside

Open this catalog and you’ll get the full mechanical index. The first pages lay out additional publications available for the HD-6EP: service manuals for dozer, electrical system, engine (6000 & 7000), final drive, injection nozzles & holders, steering clutches & brakes, undercarriage, transmission, torque converter – all listed with form numbers. Then the parts sections start. Every assembly is grouped logically: engine, powertrain, undercarriage, hydraulics, dozer, ripper. Exploded line drawings show each component with a reference number. Ordering instructions are printed right on page 3 – including the warning: “ALWAYS GIVE MODEL AND SERIAL NUMBER.” That’s not a suggestion; it’s how you avoid delays.

Serial Number Coverage – Why It Matters

This catalog specifically covers HD-6EP tractors from S/N 14484 to 22250 and 88Y22251-up. That means it includes both early and late production machines. Parts that change between serial number breaks are noted in the listings. I’ve seen guys order a clutch pack from a generic list only to find it’s for the wrong range. This catalog solves that. Flip to the steering clutch section and you’ll see exactly which part number applies to your machine’s serial number. No guesswork.

How to Use This Catalog on the Job

When you’re rebuilding a final drive or replacing undercarriage components, you need the right bolt lengths and seal part numbers. This catalog gives you that. It also includes a section called “Packaged Parts” – those handy sets of gaskets, seals, or hardware that come in a kit. Look for the square (□) indicator. That’s a time-saver. If you’re ordering parts for a dozer blade or hydraulic cylinder, the exploded view shows you the exact stack-up. No more disassembling twice to see what you missed.

Related manuals you might also need: Allis-Chalmers HD 21A Tractor Parts List, ALLIS-CHALMERS HD16D/HD16DC Parts Catalog Supplement – Section: Supplement No. 1, Allis-Chalmers HD 11 E/AG Parts Catalog. For background on the industry, check the Automotive Industry Overview and Automotive Industry Overview.

Why OEM Beats Aftermarket Every Time

Aftermarket parts catalogs often renumber parts or skip discontinued items. This is a factory-issued document from Allis-Chalmers. Every number in here is the one that came off the print. If a part has been superseded, the catalog tells you. The warning on page 2 says “part numbers and design may change” – and they list the current numbers. I’ve seen aftermarket catalogs that still show old numbers, leading to wrong parts. Don’t waste your labor rate on someone else’s laziness.

FAQ – Common Questions About This Parts Catalog

Does this catalog include the engine parts for the HD-6EP?

Yes. The engine section covers the 6000 and 7000 series engines used in this model. You’ll find cylinder block, head, fuel injection pump, nozzle holders, and more – all with individual part numbers.

Can I use this for the TR6 Ripper?

Yes. The cover states it includes the TR6 Ripper and hydraulic systems. The ripper assembly is covered in its own section with exploded views and part numbers.

Is the manual printed in color?

No. This is a black-and-white scan of the original factory catalog. The line drawings are clear and the numbers are legible. Color isn’t needed for parts identification.

What if I need the service manual for the torque converter?

This parts catalog does not contain repair procedures. It only lists parts. However, page 2 lists the separate service manual for the torque converter (Form 70644558) that you can order from your dealer. You’ll want both documents for a full rebuild.

Don’t waste another afternoon digging through blurry scans or mismatched part numbers. Download the Factory Manual now and get the exact OEM data your HD-6EP needs.