Clark-hurth 275-B 1991 Parts Catalog

If you are ordering parts for a Clark-hurth 275-B and hoping the number on the box matches what you pulled off, you are wasting time and money. A parts catalog like this one—398 pages, published January 1991—gives you the exact factory number for every Clark-hurth 275-B component. I have seen guys order a brake assembly three times because they ignored the suffix letter. This catalog kills that guesswork.

Clark-hurth 275-B 1991 Parts Catalog: What’s Inside

You get a 398-page bound document with an alphabetical index and a numerical index. Publication No. 3070 covers serial numbers: Cummins 425C101 and After, 425C101ENC and After, 425C101FSC and After. The table of contents starts with Controls — Brake, Engine, Steering, Transmission, Valve — then moves through every major system. Every part has a figure reference and part number. No generic aftermarket nonsense here; these are the original OEM drawings.

Brake Controls and Parking Brake Coverage

The catalog dedicates multiple pages to the brake system: Controls, Brake; Controls, Brake — Parking; Air Brake Valve Assembly; Air Chamber; Brake Assembly; Brake Air Lines; Air Dryer. If you need the O-ring for the parking brake valve, you find it by the figure number tied to that assembly. I have watched technicians waste half a shift chasing a brake leak because they used a seal kit from a different serial number range. This catalog eliminates that. You look up the exact part by the figure page, cross-check the serial number, and order once.

What Torque Values Does This Parts Catalog Include?

It is not a service manual, but the catalog lists torque specifications where assembly matters—look under “Converter Torque — Hydraulic System” and “Converter Torque Assembly.” Those torque values are pulled from the original Clark-hurth engineering specs. If you are rebuilding a torque converter or retightening a transmission cover, you need those numbers. Aftermarket catalogs often omit them or round up. OEM data is exact.

7 Major Systems Covered in the 275-B Catalog

Engine: accessories, air cleaner, belts, controls, exhaust, temperature and oil pressure gauges. Transmission: cover assembly, case and internal tubing, clutch, input/output shafts, quadrant. Brake: full air system, parking, assembly. Steering: cylinder assembly, gear, drag link, pump. Hydraulic: main system, reservoir, pilot valve, main pump. Electrical: batteries, wiring, gauges, starter, alternator. Valve: de-clutch valve, pilot valve, relief valve, air brake valve. Each system has its own subsection with part numbers keyed to exploded diagrams. You get the complete picture without flipping through generic cross-reference charts.

Get the Right Part Number the First Time

Use the alphabetical index at the back. Look up “Cylinder Assembly, Boom” or “Cylinder Assembly, Bucket” or “Cylinder Assembly, Steering” — all are listed with figure numbers. The numerical index lets you verify a part number you pulled from a machine. If the number appears with a suffix change, the catalog shows the supersession. Do not rely on memory. That is how you end up with a cylinder rod that is a quarter-inch too long. Clark-hurth L320 1991 Parts Catalog – 690 Pages OEM Specs covers a larger loader but shares many drivetrain components. Clark-hurth 85III 1965 Parts Catalog – Factory OEM Specs is an older reference for earlier models. Clark-hurth 85A, 85A1 1978 Parts Catalog – OEM Factory Specs bridges the gap. For general background on how these systems integrate, read the Automotive Industry Overview and the Internal Combustion Engine article.

Is this a service manual or a parts catalog?

Parts catalog. No repair procedures.

Does it cover the Clark-hurth 275-B with all serial numbers?

It covers machines with Cummins engines serial numbers 425C101 and After, 425C101ENC and After, and 425C101FSC and After. Check your serial number plate. The catalog includes the exact part numbers for these ranges. If your machine falls outside these serial numbers, some components may differ—especially brake and electrical parts. Cross-reference the figures carefully.

Can I use this catalog to find the transmission valve assembly parts?

Yes. Look under “Controls, Valve” and “Transmission” sections. The valve assembly parts are listed with figure references.

What is the publication number?

Publication No. 3070, dated January 1991.

I have been turning wrenches for 28 years. When you need a part for a 275-B, you need the factory number. Don’t chase ghosts with aftermarket cross-reference lists that were typed up by someone who never touched the machine. Download the Factory Manual and keep it on your tablet or print the pages you need. You will order parts once.