Fiat-allis 415, 415 DT Parts Catalog – OEM Part Identification

Description

I’m Mike Callahan – ASE Master Tech, San Antonio shop owner, and I’ve been through enough parts counter arguments to last three lifetimes. If you’re hunting for the right bearing, seal, or hydraulic line for a Fiat-allis 415, 415 DT Parts Catalog, you don’t have time for aftermarket cross-reference games. This 348-page OEM factory document gives you the exact part numbers, exploded views, and subgroup validity data that the factory used. No translation errors, no “compatible with” nonsense. You get the original Italian-to-English supplement that tells you exactly which parts fit which serial number range.

What This Parts Catalog Covers – 415 and 415 DT Specifics

This is a supplement to the base 415 spare parts catalog, specifically covering the 415 DT (the four-wheel-drive variant). The catalog includes the same structure as the original: a model list on orange paper, a subgroup validity index starting on page 15, and then individual tableaus (exploded diagrams) for each group. Each tableau shows the subgroup number, part callouts, and the model designation. If you’re working on a 415 DT that was built after the initial 415 production, you need this supplement because many parts changed – different final drives, different steering components, different PTO arrangements. The section titled “USE OF THE 415 CATALOG” on page 8 walks you through how to read the numbering system. Follow that, and you won’t order the wrong crown wheel and pinion.

415 DT Overhaul: Why Original Part Numbers Matter

I’ve seen guys pull a transmission from a 415 DT and order a clutch disk using a generic aftermarket number. Turns out the disk was 0.5 mm thinner on the spline. That’s a day of labor wasted. With this catalog, you look up the subgroup (say, the main clutch group) and you get the exact Fiat part number – something like 603.14.032 – and then you cross that to the current inventory. The catalog also flags which parts are superseded. The “VALIDITY OF SUBGROUPS” index (page 15) tells you if a specific subgroup applies to your tractor’s serial number. You don’t guess. You verify.

3 Reasons to Trust the OEM Catalog Over Aftermarket

First, the part numbers are printed in an official Fiat publication – not scraped from a database with typos. Second, the exploded views match the actual hardware on the tractor. Third, the subgroup validity index prevents you from ordering parts for a different production run. Aftermarket catalogs often combine multiple variants into one page, and you end up with a steering cylinder that has the wrong port orientation. This catalog is 348 pages of verified data, printed in Italy, with copyright by FIAT Torino. You want the thing that came from the factory, not a reprint that’s been scanned three times.

Understand the Validity Index Before You Order

On page 15 of this catalog, there’s a section called “Validità dei sottogruppi” (Validity of Subgroups). It’s a table that tells you, for each subgroup, which models and serial numbers it covers. For example, a subgroup might be valid for 415 DT from tractor number 500001 onward. If your tractor is earlier, you’ll need a different page. This is the kind of detail that keeps you from returning parts. Use it. This catalog also includes a model list printed on orange paper – easy to spot in a stack of papers. Find your tractor code, then the subgroup validity, then the correct tableau. That’s the workflow. Don’t skip it.

Parts Catalog vs. Service Manual – Which One Do You Need?

If you’re rebuilding an engine, you need the service manual with torque specs and clearances. This is not that document. This is the parts catalog – it tells you what the factory considers a replaceable component and gives you the part number to order. You still need the service manual for assembly procedures. But for ordering, this is the only source you should trust. The parts catalog also cross-references to the Fiat-Allis HD41 Parts Catalog – 370-Page OEM Factory Manual if you have a bigger machine in the fleet. For the 415 series, the Fiat-Allis 12G-B 1979 Parts Catalog – OEM Factory Manual 337 Pages follows the same subgroup logic. And if you need parts for a 6G loader, the Fiat-allis 6G Parts Catalog – OEM Factory Manual 559 Pages is also built the same way. All OEM, all with the same factory numbering system.

One more thing – the automotive and heavy equipment industry has moved to consolidated electronic parts catalogs, but the original printed versions like this one are still the gold standard for accuracy. For context, read the Automotive Industry Overview to understand why OEM documentation matters in a world of aftermarket variations. And if you want to dig into the history of tractor parts numbering, the Automotive Industry Overview page links to related topics.

Can I use this catalog for the Fiat 415 non-DT?

Yes. This is a supplement that adds 415 DT coverage, but it also references the base 415 catalog. The two work together. If you own a 415, you need the base catalog plus this supplement.

Does the catalog include torque specs or repair procedures?

No. This is a parts catalog. It has part numbers, diagrams, and subgroup indexes. For torque specs you need the factory service manual. Don’t mix them up.

You’ve spent enough money on wrong parts. Get the source that the dealer parts counter used before they switched to computer screens. Access the Factory Manual now and start ordering with certainty.