Description

Michigan 125 III A Parts Catalog – Factory Parts Breakdown for Articulated Tractor Shovel

Ever ordered a part for a Michigan 125 III A and ended up with something that didn’t fit? That’s because someone used the wrong catalog – or worse, an aftermarket copy. I’ve been wrenching on these loaders for years, and I can tell you: if you don’t have the original factory parts breakdown, you’re guessing. This Michigan 125 III A Parts Catalog – 136 pages of official Clark Equipment printing – is what you need to get the right part the first time. Period.

Engine and Accessories – Cummins and G.M. Variants

The manual separates everything by engine type. Cummins pages cover accessories like the air cleaner (page 21), fuel tank and lines (page 32), and the accelerator pedal linkage (page 29). G.M. versions have their own sections starting on page 31. If you don’t know which engine your serial number (404A101 or 403A101) matches, this catalog tells you. No mixing up parts between the two. Aftermarket catalogs often combine them – that’s how you get a fuel cap that doesn’t seal.

Under “Engine and Accessories – Cummins” you’ll find the engine hourmeter, support parts, and even the cartridge kit for the transmission and converter filter. That level of detail is why you need the real thing.

Brake System Breakdown: Air Valves, Chambers, and Lines

Brake parts are safety-critical. The manual lists the air brake valve (page 78), slack adjuster (page 57), air chamber (pages 57, 63), and all brake air lines for both Cummins (page 73) and G.M. (pages 75, 77). You also get the parking brake assembly and controls (pages 68, 71). If you’re replacing a brake valve, you need the exact factory number – there’s no room for a “close enough” part when stopping a 15-ton loader.

Transmission and Converter Sections – What You Get

The transmission portion covers the case (page 44), first and second clutch groups (page 45), input‑reverse and third‑fourth clutch groups (page 46), and the control cover assembly (page 47). The torque converter section includes the charging pump (pages 49, 51), pressure regulating valve (page 49), and the converter assembly itself. Each component is broken down into its individual parts with Clark’s own part numbers. The transmission oil dipstick and filler cap are also listed separately for Cummins and G.M., because they are different.

136 Pages of Factory Part Numbers – Why Aftermarket Catalogs Fail

This manual is 136 pages of pure part breakdowns. It’s not a service manual – no torque specs, no repair procedures. But it is the only way to correctly identify every bolt, seal, line, and bracket on your 125 III A. Aftermarket catalogs often reprint old revisions or skip pages. I’ve seen them leave out the bucket cylinder assembly (page 93) or the steering cylinder (page 85). With this factory catalog, you get the exact same information the dealer’s parts counter uses. That’s why Michigan 125 III A Parts Manual No. 2521-R1 exists as a companion for a different revision. For the machine covered here (serial 404A101 and 403A101 onward), this is the correct document.

Related manuals you might need: MICHIGAN 125 III A Articulated Tractor Shovel Parts Manual and Michigan 125 III A Parts Catalog – OEM Factory Manual 264 Pages. Always verify your serial number before ordering.

Bucket, Boom, and Hydraulics – Detailed Breakdown

The bucket assembly data (page 15) gives you cutting edge part numbers and bucket capacity specs. The boom, bellcranks, pushrods, and leveler are on page 13. The bucket leveler air valve assembly has its own page (16). Hydraulic pump for bucket and boom is page 89; the whole system diagram is page 91. If you need a control valve rebuild, pages 95 and 97 break down the valve assembly into every spool and spring. Don’t guess – order from the pictures.

Does This Manual Cover Torque Specs?

Short answer: no. This is a parts catalog, not a service manual. It won’t tell you how tight to torque a head bolt or a wheel nut. For that, you need the factory service manual. What it does give you is the correct fastener part number. When you look up a torque value in the service manual, you can be sure you’re using the right bolt. I’ve seen guys use the wrong grade because they ordered from an aftermarket listing – then they wonder why it snapped. For background on how these machines are designed, the Automotive Industry Overview puts construction equipment in perspective. And the Automotive Industry Overview covers general standards you might find useful.

If you’re replacing a valve or a brake component, you need the part number first. Then you can torque it properly with the service manual. This catalog gets you the part. The service manual gets you the torque. Both are necessary.

The bottom line: if you own a Michigan 125 III A with serial 404A101 (Cummins) or 403A101 (G.M.), this is the parts bible. Skip the aftermarket PDFs that cost less but leave you holding a wrong gasket. Access the Factory Manual and start ordering the right parts today.

Is this a service repair manual or a parts catalog?

It is a parts catalog. It contains exploded views and part numbers only, not step-by-step repair procedures or torque specifications. For service instructions, you need the factory service manual.

Does it cover both Cummins and G.M. engine variants?

Yes. The manual has separate sections for each engine type. Check the serial number on your machine: 404A101 indicates Cummins, 403A101 indicates G.M.

Can I use this to order brake parts?

Yes – brake system parts are listed on pages 57, 63, and 73‑77.

What is the difference between this and the 264‑page catalog?

The 264‑page version covers a broader range of serial numbers or machine variants. This 136‑page catalog is specific to the 125 III A as shown in the title. Always match your machine serial to the manual’s serial range.