Description

Michigan 125 II I Parts Catalog – Factory OEM Parts Breakdown

Ever tear down a brake group on a Michigan 125 II I tractor shovel only to find the part number you need is buried in a stack of aftermarket pages that don’t match what’s actually bolted to the machine? I’ve been there. That’s why you want the real thing: the Michigan 125 II I Parts Catalog from Clark Equipment. This thing is 186 pages of factory-indexed part breakdowns, not some third-party reprint that guesses at the hardware. Every exploded view and part callout in this manual came off the same drafting table as the machines themselves. If you’re ordering seals, bearings, or hydraulic lines, you need the OEM numbers — and this is where you get them. Using the wrong part on a brake assembly can get someone killed. This catalog eliminates that risk by giving you the exact factory specification for each component. No guesswork, no assumptions — just the part number Clark put on the assembly line. The heavy equipment industry relies on standardized part numbering, as described in the Automotive Industry Overview.

Part numbers don’t lie.

Brake Group and Axle Assembly Breakdowns

Brake group starts on the index under 1C12. You get separate pages for the front brake assembly and rear brake assembly. The axle group splits into front and rear axles, differentials, and planet carriers. This matters because the 125 II I uses different planet carrier assemblies front vs rear (1C4 and 1C5). Without this manual, you’re guessing which carrier you have. With it, you pull the page, call your parts supplier, and read them the number from the right column.

What Engine Variations Are Covered?

Three engine options are documented: Cummins, DAF, and G.M. Each has its own subsection under Engine and Accessories (1F6), with separate fuel lines, oil pressure lines, and mountings. Even the accelerator pedal linkage varies between the Cummins (1A6) and the others. If your machine has a Cummins, you’ll also find the cold start equipment (1F14) and oil filter (1G1) in dedicated sections. Aftermarket manuals lump all engines together — this one keeps them separate, so you get the right part the first time.

186 Pages of Factory Part Numbers

Each of the 186 pages is a reproduction of the original Clark Part Manual No. 5019. That means the part numbers are the ones Clark used when the machine left the factory. You won’t find cross-references to aftermarket suppliers — you get the genuine OEM number, and then you go find it. This is especially important for the Hydraulic Group (2A13) and Transmission Group (2C2). The hydraulic control valve (2D9) and steering pressure relief valve (2D12) require exact replacements; the factory catalog lists every subassembly. Don’t trust a generic listing.

Hydraulic Group: Valve and Pump Identification

Hydraulic lines are covered in two big sections: front end equipment lines (2B11) and steering lines (2B12). The pump group (2D3) breaks into three separate pumps: front-end hydraulic pump, converter charging pump, and steering pump. If you’re swapping out a pump, you need to know which one is which. The manual’s exploded views show the mounting orientation and the exact port configurations. That saves you from ordering the wrong pump and losing a day of work.

Cross-Reference Your Machine Serial Number

The catalog includes a line on the cover to record your machine serial number. That serial number ties to the exact build configuration. If you skip this step, you might order parts for a different revision. Write your serial number down, then use the index to navigate to the correct group. The index is alphabetically organized: Accelerator through Wheels. Use it. I see too many techs flip pages randomly. This manual is structured — work the structure. For more background on why OEM documentation matters, see the Automotive Industry Overview.

Is this manual a reprint or an original factory scan?

Original factory scan of Clark Equipment Part Manual No. 5019.

Can I use this to identify parts for my 125 II I that has a different engine?

Yes, the manual covers multiple engine variants including Cummins, DAF, G.M. You’ll find separate sections for each engine’s accelerator pedal, air cleaner, exhaust, fuel lines, etc. For example, the Engine and Accessories chapter splits into G.M. (1F7), DAF (1F8), and Cummins mountings (1F10). Cross-reference your machine serial number on the front cover to ensure you have the right base configuration, then locate the specific engine subsection. This is what makes OEM documentation superior — you get the exact variations, not a one-size-fits-all diagram.

Related Manuals

• Volvo BM Michigan 125C 1988 Parts Catalog – Factory OEM Parts Manual
• Michigan 851 Parts Catalog – 72-Page Factory Parts Manual
• Michigan 85III 1965 Parts Catalog – Factory OEM Parts Breakdown

If you need to keep your 125 II I running with factory-correct parts, you need this manual. Access the Factory Manual from AutoRepairManuals and get the real part numbers — not guesswork.