Description

Michigan 175 III 1972 Parts Catalog

If you are pulling wrenches on a Michigan 175 III and you reach for an aftermarket parts list, you are setting yourself up for a headache. Aftermarket catalogs mix up revisions, leave out superseded parts, and often give you the wrong part number for the serial prefix you have. I have seen guys bolt on a steering cylinder that was one inch too long because the generic listing didn’t account for the three different engine options this machine came with. That costs time and money. The 1972 Michigan 175 III Parts Catalog is what Clark Equipment put together for Models 315-1, 315-2, and 315-3. It covers the three engine variants: G.M. 6V-71N, Cummins V8R-240-C1, and Rolls Royce C6NFR. The serial number ranges are printed right on page 1 – 315EN2001-1 Thru, 315EN2001-2 Thru, and 315EN2001-3 Thru. Record yours in the blank provided, and you never have to guess which part fits.

This is not a reprint or a scanned copy of some third‑party book. It is the original factory Parts Manual No. 145, printed in the U.S.A. in 1972, and it runs 152 pages. Every page is an exploded‑view illustration with the exact part number, the description, and the quantity per assembly. You will find the Engine section starting at 00P-001 with engine mountings and assembly, right through the radiator, fan, air cleaner, exhaust, fuel lines, controls – the whole tractor shovel. I have seen too many mechanics try to match a hydraulic line by eyeball because they did not have the right OEM number. That ends here.

What the 152 Pages Cover

The table of contents is laid out by system. Each section has its own page number prefix. For example, the engine mountings run from 00P-001 to 00P-013, and the engine assembly is on 00P-051. The fuel tank is on 06P-051. The operator’s compartment covers everything from hood, shroud, grille (10P-002) to the seat assembly (10P-101). If you need the steering drag link, you turn to 28P-001. The transmission and torque converter sections are detailed: transmission assembly on 36P-003, first and second clutch group on 38P-351, converter assembly on 40P-001. The front and rear axle assemblies – both planet carrier and differential – are covered from 44P-001 through 46P-111. Brake lines, air brake valve, de‑clutch brake valve – all of it. The manual even includes the pressure relief valve for steering (16P-101) and the main control valve (16P-153). Nothing is left out.

One section that saves a lot of frustration is the Hydraulic Lines – Steering (22P-002 through 22P-009) and Hydraulic Lines – Transmission & Converter (24P-052 through 24P-055). When a line cracks and you need the correct tube with the right bend, the factory illustration shows the exact routing and the part number. Do not trust a generic catalog that lumps all 175 IIIs together – the engine option changes the hydraulic pump mount and the line routing. Page 18P-001 shows the steering pump, and 18P-051 shows the main hydraulic pump. Match those numbers against your serial number, and you order the right part the first time.

Who Needs This Catalog

This catalog is not for someone who wants a glossy coffee‑table book. It is for the guy who owns a 175 III and does his own maintenance, or for the shop that sees these machines come through the door. If you are a home‑garage enthusiast who picked up an old Michigan at auction, you need this manual before you spend a dime on parts. The aftermarket parts houses will ask for your serial number, but if you do not have the OEM part number to cross‑reference, you risk getting a “will fit” part that does not. The same goes for a professional mechanic billing by the hour – you cannot afford to wait for the wrong part to arrive. Use the factory book, call your supplier with the OEM number, and get the job done.

For a real‑world example: say you need a new boom cylinder seal kit. The exploded view on 20P-103 shows the boom cylinder assembly with every seal and backup ring numbered. Order by that number. The cylinder steering on 20P-003 and the bucket cylinder on 20P-053 are similarly documented. No guesswork.

Factory Specs vs Aftermarket Documentation

I have a distrust of aftermarket parts catalogs that runs deep. They often copy old prints, miss revisions, and substitute illustrations from a different model year. The OEM manual – this one – was printed by Clark Equipment’s Construction Machinery Division in December 1972. It shows the exact part numbers that were in production at that time, and it lists the serial number breaks for each engine. If you have a machine built after a certain serial number, the part may have changed. The manual tells you. Aftermarket catalogs do not.

Also, the index at the beginning allows you to find any section quickly. The page numbers are not sequential in the normal sense – they use a system prefix (e.g., 00P, 02P, 04P) – but the contents list on page 3 gives the designation and the revision date (all Dec 72). That means you know the manual was updated to that date. If you need a part that was superseded later, you will have to cross‑reference with a later bulletin, but for the 1972 production, this is the definitive source.

Related Manuals

• MICHIGAN Model 175 III Tractor Shovel Parts Manual No. 2001
• Michigan 175 III Tractor Shovel Parts Manual 32179-32198
• MICHIGAN Model 175 III Tractor Shovel Parts Manual

For broader context on the construction equipment industry, see Automotive Industry Overview. Also check Automotive Industry Overview for related engineering history.

Frequently Asked Questions

Does this manual cover the hydraulic system completely?

Yes. The hydraulic sections cover steering pump (18P-001 and 18P-005), main pump (18P-051), steering cylinder (20P-003), bucket cylinder (20P-053), boom cylinder (20P-103), and all hydraulic lines for steering and transmission. The reservoir is on 26P-001. Front end equipment lines are on 26P-052 through 26P-055. It is complete.

Will the part numbers work for my machine if it has a different engine?

Manual covers three engine options: G.M., Cummins, and Rolls Royce. The engine mountings and the cold start equipment (00P-151) differ per engine. The serial number ranges on page 2 tell you which engine fits which serial prefix. Use those to verify.

If you are serious about keeping a 175 III running, or if you are restoring one for a collector, you need this factory parts catalog on the workbench. No more ordering from memory. No more cross-referencing bad data. Get the factory numbers, get the correct part, and get the machine back to work. Access the Factory Manual from AutoRepairManuals today.