Description

Michigan 280I Parts Catalog – Factory OEM Parts Manual

If you’re chasing a part number for a Michigan 280I and you’ve been flipping through a reprint that calls out the wrong differential cover or gives you a brake shoe that doesn’t fit, I get it. I’ve spent too many afternoons with mislabeled aftermarket stuff. This is the real deal – Clark Equipment Company’s original Parts Catalog for the Model 280I Tractor Dozer. 108 pages of factory part numbers, exploded views, and section breakdowns. No third-party redrawing that loses detail.

Flip to page 2 and you’ll find the full index. Every major group is listed: Axle, Brake, Converter, Cylinder, Hydraulic, Transmission, Wiring, Valve. Each group has its own section number (like Brake Group runs from 1B7 to 1B14). The air cleaner section starts on page 5 – that’s where you’ll find the Cummins air cleaner assembly parts. Everything is keyed to the machine serial number so you order the right piece.

Brake Group – Parts Breakdown You Can Trust

Brake system parts on a dozer take a beating. The manual covers front and rear brake assemblies (sections 1B7 and 1B8), brake air lines (1B10), controls and floorboards (1B12), plus the parking brake assembly and controls (1B13–1B14). Each page shows the exploded view with callouts matched to part numbers. You won’t have to measure a worn-out brake shoe against a generic photo – the factory drawing tells you exactly which one goes where.

Transmission and Drivetrain – Over a Dozen Shaft Groups

The transmission group is about as complete as it gets. It breaks down the transmission assembly, mounts, clutch cover group, case and internal tubing, control cover assembly, and then six separate drive shaft groups: Second/Fourth (Group A), First/Third (Group B), Low Range (Group C), High Range (Group D), Input/Fwd Clutch (Group F), Output/Declutching (Group O), and Reverse (Group R). Each group has its own page with part numbers for gears, bearings, shafts, and seals. If you’re rebuilding a 280I drivetrain, this is the map.

3 Reasons to Buy the OEM Print Over a Copy

First, the original factory document uses the same numbering system as the dealer parts network. A reprint often loses contrast in the exploded views, and some pirate the pages out of order. Second, the OEM catalog includes machine serial number interpolation – it tells you when a part changed mid-production. Third, the paper quality in the original print holds up on a greasy workbench. I’ve seen too many inkjet copies that bleed when you get hydraulic fluid on them. This is the one you want.

Who Actually Needs This Parts Catalog?

Shop owners who still work on these Michigan dozers. DIY operators who do their own maintenance. Home garage guys who bought an old 280I cheap and need to source a lift cylinder, steering gear, or a radiator from Young (section 1E10). Even if you’re not a full-time mechanic, this manual gives you the part numbers to call a dealer or search a salvage yard. You avoid ordering the wrong planet carrier assembly or a non-matching No-Spin differential unit.

Other Manuals You Might Need

If you work on other heavy equipment, the VOLVO BM 125C Wheel Loader Parts Catalog covers that machine the same way. For a smaller Michigan model, grab the Michigan 851 Parts Catalog – 72-Page Factory Parts Manual. And if you’ve got a 1965-era 85III, the Michigan 85III 1965 Parts Catalog – Factory OEM Parts Breakdown is the right matching catalog.

For context on how these machines evolved within the wider equipment industry, you can read the Automotive Industry Overview on Wikipedia. Or check the same Automotive Industry Overview page for general background on vehicle design eras.

Frequently Asked Questions

Does this parts catalog include torque specs or repair procedures?

No. This is a parts catalog only – exploded views and part numbers. You need the separate service manual for torque values.

Can I identify a part from a 1960s Michigan 280I using this manual?

Yes, that’s exactly what it’s for. The catalog was printed by Clark Equipment Company and covers the 280I model from serial number introduction through the end of production. Every group – from the brake air lines to the high range drive shaft – has its own section with part numbers matched to the assembly drawing. If your machine has been modified, you’ll need to compare against what’s actually installed, but for a stock 280I this is the definitive source. It even includes wheel and tire data on section 2A8, so you can order the right rim and tire size.

Stop wasting time with blurry scans and mismatched part numbers. If you own a Michigan 280I, you need the factory document on your bench. Access the Factory Manual today.