Description

Clark Equipment 125 Parts Catalog – Factory OEM Manual for Series III

If you’re hunting for a part on an old Michigan 125 Series III tractor shovel, you already know the drill. Aftermarket catalogs give you a blurry drawing and a part number that doesn’t match the casting. You waste time cross-referencing, return wrong parts, or worse – bolt on something that fits but fails at 1,800 psi. I’ve been there. That’s why you need the Clark Equipment 125 Parts Catalog – the factory-issued document, not a reprint or third-party compilation. This is the same book the dealer’s parts counter used when the machine was new.

Engine and Accessories: GM 6V-53N Parts Breakdown

Page 3 of this 196-page Parts Catalog opens with the GM 6V-53N diesel engine and its accessories – starter (Delco-Remy 1113873), alternator, voltage regulator, and the oil pressure sender unit. You’ll see the exact part numbers for the sender unit adaptor (3200337) and the fibre washer (3220841) that prevents oil leaks at the sender. The catalog tells you to order engine parts through your nearest GM Diesel distributor, but it gives you the group type number and serial number data you need to get the right piece. When you’re dealing with a machine that’s been through five owners, having that original breakdown saves hours of phone calls.

Why a Factory Parts Catalog Beats Aftermarket Lists

Aftermarket parts lists often skip the small stuff – like the locknut for the mounting block (18D-04) or the pipe plug (13F-02) on the oil pressure line. Those missing pieces turn a simple oil pressure sender replacement into a leak hunt. This factory catalog includes every nut, washer, and plug shown in the assembly drawings. You get the illustration and the itemized table together. No guessing which bolt goes where. The manual says it plain: “When ordering parts, always state model and serial no. of machine.” That’s not just a reminder – it’s the only way to guarantee you get the correct part for your specific Series III variant.

3 Reasons to Use the OEM Parts Catalog

First, the part numbers are verified against the original engineering drawings. Second, the exploded views show how everything stacks – from the engine oil pressure line (page 4-5) to the air cleaner bracket. Third, the catalog cross-references to the machine serial number, so you don’t order a part that was superseded after a certain build date. A generic parts list can’t do that. You can pair this catalog with the Clark Equipment 75B 1989 Parts Catalog – OEM Factory Manual or the Clark Equipment 310, 310III Parts Catalog – OEM Factory Manual if you’re running a mixed fleet.

Get the Right Part Number Before You Order

Before you call the dealer, pull up this catalog and locate the part number. For instance, the oil pressure sender unit is 940643 – but only if your machine uses that style. The catalog shows two oil pressure switches (572421) and a sender (940643) on the same line, so you can tell them apart by the illustration. Page numbers run continuously from 1 to 196, with each section clearly titled. You’ll find the engine group (pages 3–5), then move into the powertrain, hydraulics, and chassis sections as you flip through. No scrolling through a generic index – the bookmark structure matches the paper layout.

Parts Ordering Procedure: Serial Numbers Matter

Inside the front cover, there’s a blank for your machine serial, engine model, and engine serial. Fill it in before you start ordering. The catalog assumes you have those numbers because every part illustration is keyed to a specific machine configuration. The engine section (page 3) requires your GM 6V-53N group type number. The transmission and torque converter parts later in the book need the converter serial. I’ve seen shops order a torque converter seal based on “looks about right” and end up tearing it back out. That’s why this manual exists – to eliminate the guesswork. The Clark Equipment 12E2E 1968 Parts Catalog – OEM Factory Manual follows the same strict serial-number-based system.

FAQ

Does this Parts Catalog include service procedures or torque specs?

No. This is a parts-only manual. It lists every component, gasket, bolt, and seal but doesn’t tell you how to install them. You’ll need a separate service repair manual for torque values and disassembly steps.

How many pages does the manual have?

196 pages exactly. Every page is original factory content with no blank filler pages.

Can I use this for a Michigan 125 Series I or II?

Not reliably. This catalog is specifically for the Series III tractor shovel. Series I and II had different engine mounts, hydraulic pumps, and axle configurations. Using the wrong parts list can lead to ordering incompatible components. Check your serial number against the first page.

What if I need to identify a part that isn’t listed in the index?

Start by scanning the exploded view for the assembly that contains the part. Every illustration has callout numbers matched to a table. If the part is an engine component like a fuel injector, you’ll need the GM 6V-53N engine parts manual. The catalog explicitly says to order engine internals from your GM Diesel distributor using the group type number stamped on the rocker cover.

When you’re rebuilding a tractor shovel that’s been parked for twenty years, the one thing you can’t afford is the wrong part. The Clark Equipment 125 Parts Catalog puts the original factory part numbers, illustrations, and ordering instructions in your hands. No aftermarket guessing, no blurred photocopies – just the same document the dealer used. Automotive Industry Overview and Automotive Industry Overview can tell you about industry standards, but they won’t tell you which mounting block fits your Michigan. This catalog will. Access the Factory Manual now and get back to wrenching without the parts counter runaround.