Description

Michigan 125B 1976 Parts Catalog

You’ve got a Michigan 125B 1976 Parts Catalog in your hands. If you’ve ever tried ordering a brake line or a valve assembly from a third-party listing, you know the sinking feeling when the part shows up and it’s the wrong size or thread pitch. That’s not happening here. This is the factory-published parts catalog from Clark Equipment Company, dated February 9, 1976, covering serial number ranges 432A101 and after for Cummins, and 441A101 and after for G.M. power units.

Every part in this catalog is keyed to those serial numbers. Page after page of exploded diagrams, part numbers, and descriptions. You get 268 pages of stuff you can’t get from reprints or aftermarket scan jobs. The original printing is clear enough to read the callouts on an air brake valve assembly without guessing. Let’s walk through what matters on the bench.

7 Systems Covered – From Engine to Brake and Cylinder

Look at the alphabetical index. It’s not organized by guesswork — it’s alphabetical. “Accelerator Pedal E23, E25” sits right next to “Bellcranks, Boom, Pushrods, Leveler & Kickout B3.” You don’t flip through 50 pages of filler. Need the right boom cylinder? It’s under “Boom Cylinder Assembly C13.” Need the parking brake lever? “Brake Parking Lever Assembly B26.” The catalog breaks down every subsystem: Engine accessories (E16, E17), Brake air lines (front B7, rear Cummins B11, rear G.M. B17), Valve assemblies (air brake valve V3), and Cylinder assemblies (bucket cylinder C15). If you can’t find it in the index, it’s because the part wasn’t on the machine.

I’ve been wrenching since the 90s. This sort of index density saves you from ordering the wrong planet carrier for the front axle. Your time is billable. Don’t waste it.

Air Brake Valve Assembly and Brake System Coverage

Air brakes on a loader are not forgiving. The index calls out “Air Brake Valve Assembly V3” and then dives into “Brake Air Lines, Front” and “Rear” for both engine options. The manual doesn’t lump all brake parts together — it separates out the foot controls (B22), parking controls (B23), head assembly (B24), and the power cluster (B29). You want to rebuild the brake valve? That’s the V3 section. You want to trace the air lines from the compressor to the chamber? Front brake lines are B7. Rear for Cummins is B11, for G.M. it’s B17. No mixing. The factory knew that a rerouted air line on the wrong side of the machine causes a slack adjuster to bind. They drew it separate on purpose.

Automotive Industry Overview talks about how manufacturers standardized part numbering, but this catalog predates the modern systems. You still have to match the original Clark part numbers to what’s on the shelf. This manual gives you those numbers.

Engine Accessories and Belts – OEM Part Numbers You Can Trust

“Accessories, Engine E16, E17” and “Belts, Engine E16, E17” are two separate entries. That matters because a belt tension spec requires the correct belt part number, not a generic substitute. The air cleaner connections (E19, E21) come right after. You’d be surprised how often a DIY guy slaps a Fram filter on a Michigan loader and wonders why the hose clamp doesn’t seat. The catalog shows the factory clamp part and the hose routing. You get that from page images, not from a parts counter guy reading from a screen.

Axle Differential and Carrier – Front and Rear

Front drive axle (A3) and rear drive axle (A7) each get their own pages. The differential and carrier for the front is called out separately from the planet carriers (front A18, rear A19). If you’re swapping a ring and pinion, you need the correct axle assembly number. The manual tells you that the front axle differential and carrier is listed under “Axle Differential & Carrier, Front All.” The rear is A15. That’s not vague. It’s specific enough that you can order the shim kit without pulling the carrier a second time.

Related manuals you might need: Michigan 125B Articulated Tractor Shovel Parts Manual, Michigan 125B Tractor Shovel Parts Manual Supplement, and VOLVO BM 125C Wheel Loader Parts Catalog.

Bucket Cylinder and Leveler – Hydraulic Component Breakdown

Bucket cylinder assembly is C15. Boom cylinder is C13. The bucket leveler is listed under B3 alongside the bellcranks and pushrods. If you’re rebuilding the tilt cylinder, you need the seal kit part number. It’s in that section. The manual even includes “Bucket Assembly Data B30” — dimensions and optional bucket part references. That’s the kind of detail that lets you know if a 3-yard bucket will fit your machine without pulling a tape measure. You get the factory data.

Source Validity – Why You Don’t Trust Aftermarket Parts Catalogs

Aftermarket parts catalogs for 1970s loaders are often photocopies of photocopies. The line art degrades, the part numbers blur, and the serial number ranges get dropped. This manual is the original scan from a factory print — the same one that sat in the Clark distributor’s parts room. You can see the parts bulletin M6-2 on page 3 that talks about decal identification changes starting January 1976. That’s information you won’t find in any third-party reprint. If you’re restoring a 125B or keeping it in service, you need the authentic factory part numbers, not something a parts website guessed at. The Automotive Industry Overview confirms that Clark Equipment was a major OEM — their parts system was proprietary. This catalog is the key to that system.

Short paragraph: You get 268 pages of verified factory data. Nothing else matches it.

FAQ

Does this parts catalog list torque specifications for the 125B?

No. This is a parts catalog, not a service manual. It provides part numbers, exploded views, and descriptions. Torque specs are in the corresponding service manual.

How do I know if a part from this catalog will fit my 125B with a Cummins engine?

Check the serial number range printed on page 1: 125B Cummins — 432A101 and after. The index separates brake air lines for Cummins (B11) and G.M. (B17). Every part in the catalog is keyed to the specific engine and machine serial break. If your machine falls outside those ranges, you may need the supplement Michigan 125B Tractor Shovel Parts Manual Supplement for updates. Clark issued bulletins to cover later production changes — this catalog includes the 1976 baseline.

If you’ve got a Michigan 125B on your lot or in your shop, this is the only way to get the right part the first time. No cross‑referencing, no guessing. Access the Factory Manual now.