Description

Allis-chalmers I-40, I-400 1983 Parts Catalog

I’ve seen more aftermarket parts catalogs than I care to count. Blurry illustrations, part numbers that don’t match anything on the shelf, sections that look like they were photocopied from a damp library copy. If you’re working on an Allis-chalmers I-40, I-400 1983 Parts Catalog is the only reference worth pulling out of the drawer. This is the factory-issued document – 203 pages of indexed parts, with the same drawings and part numbers the dealer used when these tractors rolled off the line.

Look at the foreword on page 2. It tells you exactly how the book is laid out: alphabetical index up front, numerical index next, then illustrations on the left, text on the right. Page 1 shows the title and part number 9006762 – Automotive Industry Overview won’t teach you that. Common hardware like bolts, nuts and cotter pins are listed indented under the item they attach to. You don’t get that level of detail in a generic PDF.

Parts Catalog: What the Index Covers

You get fifteen major groups. AIR INTAKE & EXHAUST SYSTEM, BRAKE SYSTEM, CLUTCH, COOLING SYSTEM, DRIVE TRAIN, ELECTRICAL & INSTRUMENTS, ENGINE, FUEL SYSTEM – all broken down by component. Under ENGINE you’ll find Cylinder Block, Cylinder Head, Valve Operating Mechanism (both exhaust and intake valves), connecting rod bearings, piston ring sets, even the water pump and fan belt. The Brake section covers the brakes and controls separately. No guesswork.

Why an OEM Parts Catalog Beats Aftermarket Copies

Aftermarket catalogs often skip the numerical index or renumber items to save space. This one has both indexes – alphabetical and numerical – so you can find a part by name or by the number stamped on the old piece. The illustrations are the factory originals, not redrawn. I’ve had to replace cylinder heads because a generic catalog showed the wrong bolt pattern. With this catalog, the Cylinder Block and Cylinder Head sections give you the exact fasteners and quantities.

Valve and Cylinder Parts: Factory Indexing

Under ENGINE, the Valve Operating Mechanism subsection lists springs, exhaust valves, intake valves, push rods, and rocker arms. The Cylinder Liner and Piston sections follow. Each part has a seven-digit Allis-chalmers part number. You cross-reference that with the numerical index to confirm it’s the right one. That alone saves a return trip to the parts counter.

3 Systems That Will Save You Hours of Cross-Referencing

First: the BRAKE SYSTEM – brakes and controls are on pages 139 and 141. Second: the DRIVE TRAIN – differential, final drive, P.T.O. clutch, transmission gears and shafts. Third: the ELECTRICAL & INSTRUMENTS section – includes warning lamp flasher, starting motor, distributor, generator, and wiring. Each system has its own exploded view with item numbers keyed to the text. No flipping back and forth to a separate index for every bolt.

Brake System Breakdown: From Pedal to Shoe

Page 139 shows the master cylinder and brake shoes. Page 141 has the control linkage. If you’re rebuilding a brake system, you need the correct return spring and adjusting parts – the catalog lists every component indented under the assembly. That includes the hardware that’s included with the assembly and what you order separately.

Who Needs This Catalog?

If you own an I-40 or I-400, this is the only parts reference you should touch. DIY mechanics who hate returning parts will use the alphabetical and numerical indexes first. Shop owners who need to order parts fast will appreciate the exploded diagrams that show exactly where each seal, bearing, and bolt goes. Beginners should read the foreword once – it explains the indented hardware rule, which is where most people get tripped up when ordering fasteners.

Source Validity – OEM Factory Document

Part number 9006762, February 1983, Litho in U.S.A. by Allis-chalmers Agricultural Equipment Sector, Milwaukee. This is the original factory catalog, not a third-party compilation or a photocopy. The index references page numbers that match the physical document – no generic page numbering. Related manuals in the same factory lineage include Allis-Chalmers HD-6EP Parts Catalog – Factory OEM 374 Pages and Allis-chalmers HD21A 1965 Parts Catalog – Factory OEM and Allis-chalmers HD16D, HD16DC 1970 Parts Catalog – OEM Factory Specs. For broader background on agricultural equipment documentation, see Automotive Industry Overview.

Does this catalog cover both the I-40 and I-400 models?

Yes. The manual covers both models.

What is the difference between this parts catalog and a service manual?

A service manual contains repair procedures, torque specifications, and diagnostic information for disassembly and assembly. This parts catalog focuses on part numbers, exploded views, and ordering information. You will not find step-by-step overhaul instructions here – you need the factory service manual for that. But without this catalog, you cannot confirm the correct part number for the cylinder head gasket, valve spring, brake shoe, or transmission seal. The two complement each other; one tells you how to fix it, the other tells you what to order.

Ordering parts for an old tractor doesn’t have to be a guessing game. This catalog puts the factory’s own lookup system in your hands. Access the Factory Manual and start identifying parts correctly.