Fiat-allis 25C, 25CS Parts Catalog – 84-Page OEM Parts Index

Description

If you’ve ever ordered a part by guessing its number, you know the drill: wrong part, wasted time, customer pissed off. This is a factory catalog from Fiat-allis for the 25C and 25CS diesel tractors. It’s not a reprint. It’s the original Italian document, 84 pages of part numbers, illustrations, and ordering instructions that tell you exactly what to order. No aftermarket nonsense. No third-party numbering that may or may not match. This is what the dealer used when this machine was new.

Factory Ordering Instructions and Naming Conventions

The first pages of this catalog spell out exactly what Fiat-allis expects when you order a part. You need the tractor model, the identification number stamped on the right rear of the tractor body, the engine ID number for engine parts, and the exact ordering number with the corresponding description from the subgroup lists. If a part number is preceded by “Nr,” it’s a standard piece. If it’s “BS,” it’s special hardware. Miss any of this, and you get the wrong part. Period. I’ve seen guys order a simple bolt by guessing – this catalog stops that.

84 Pages of Verified Part Numbers

Every page in this catalog covers a specific subgroup. The book is divided into sections (fiat_25c_25cs_01 through fiat_25c_25cs_84), each with exploded-view drawings and corresponding part numbers. You won’t find generic “compatible with” garbage here. These are the exact numbers Fiat-allis stamped onto the parts. If you need a bearing, a seal, a hydraulic fitting, or a piece of bulloneria speciale, you look it up by subgroup. The catalog also includes summary tables – page 87 for hardware dimensions, page 95 for bearing dimensions. That alone saves you from pulling a caliper on every loose part.

What Do the Dimensions Tables Include?

On page 87 and page 95, you get dimensional data for standard hardware and bearings. The catalog lists each part’s size, thread pitch, length, and bearing ID/OD/width in metric units (but you’ll convert – I recommend keeping a chart handy). This is critical when you’re chasing a replacement for a worn bolt or a bearing that’s lost its race. Without these tables, you’re measuring twice and still guessing. With them, you order the exact piece.

Factory Warnings You Should Not Ignore

The catalog includes a section called “Avvertenze” – warnings. Things like: left and right are referenced from the driver’s seat facing forward. Electrical wires come complete with terminals – no crimping needed. Parts with attached screws or plugs are supplied as complete assemblies unless otherwise noted. These aren’t suggestions. Ignore them and you’ll order a component missing its grub screw or miswire a harness. Follow the factory notes, and the job goes together the way it left the line.

Aftermarket vs. OEM: Why This Catalog Wins

I’ve had three aftermarket parts catalogs for old Fiat-allis machines land on my bench. Every one of them had at least one wrong part number. One listed a bearing that was 2mm off on the OD. Another used a reference number that didn’t cross to anything in the real world. This catalog is the original FIAT D.T.P. publication – the same one the factory parts counter used. Automotive Industry Overview documentation like this doesn’t get updated with aftermarket guesses. It’s the first edition, printed in 1953, and it’s still correct for the machines it covers.

You want parts that fit? Use the factory book. Automotive Industry Overview can tell you trends – this catalog tells you torque values, part numbers, and dimensions. Don’t mix them up.

Does the Catalog Cover Both 25C and 25CS?

Yes. The catalog’s title page lists both models: “25C – 25CS DIESEL – Catalogo Parti di Ricambio.” Every subgroup applies to both variants unless the line drawing shows a specific difference. The ordering instructions ask for the tractor’s identification number, so if there’s a model-specific part, you’ll find it by cross-referencing the subgroup. I’ve used this catalog to order a final drive seal for a 25CS – the number matched the original part that came off.

Related Manuals:

• Fiat-Allis HD41 Parts Catalog – 370-Page OEM Factory Manual
• Fiat-Allis 12G-B 1979 Parts Catalog – OEM Factory Manual 337 Pages
• Fiat-allis 6G Parts Catalog – OEM Factory Manual 559 Pages

Can I use this catalog for the 25CS model?

Yes. It covers both 25C and 25CS.

How do I interpret the part numbers with letters like “BS”?

BS stands for “Bulloneria speciale” – special hardware. These are bolts, nuts, or fasteners that are not standard metric or SAE. They have specific dimensions listed in the summary tables on page 87. “Nr” means “Normale” – standard hardware. When ordering, you must include the tractor model, identification number, and the exact ordering number from the subgroup. If you order a BS part without its number, the supplier can’t match it. Always reference the subgroup illustration and the dimension table to confirm you’ve got the right item. I’ve seen guys order an “Nr” bolt when the drawing called for “BS” – that bolt was 1.5mm shorter and wouldn’t torque.

You’re tired of ordering parts that don’t fit. Stop guessing. Access the Factory Manual now and get the original Fiat-allis 25C, 25CS parts catalog – 84 pages of factory-correct data.