Fiat-allis 780, 780 DT Parts Catalog

You have a Fiat-allis 780 or 780 DT in the shop. You need a clutch disc, a hydraulic line, or a seal for the final drive. You pull up a third-party parts list and the numbers don’t match. Or the listing says “fits 780” but the thread pitch is wrong. That wait for a wrong part eats your labor rate. I have been there. A factory Fiat-allis 780, 780 DT Parts Catalog kills that guesswork cold. This is the same book the dealer parts counter used in the 1970s and 80s. 967 pages of exploded views, model-specific codes, and variant callouts. You get the exact Fiat-allis number for every nut, bolt, bearing, and gasket on these machines.

Model Identification: 780 vs 780 DT

Page 11 of the manual shows the Elenco dei Modelli (model list). For the 780, chassis numbers start at 655.100.000. For the 780 DT (the four-wheel-drive version), chassis start at 655.127.000. Both share the same engine code series but differ in driveline parts. The manual lists four clutch options: Ferodo and Luk pressure plates for each model, with separate part numbers. If you order a clutch for a 780 DT using a 780 number, you will be pulling the transmission back off. This catalog shows which code applies to your chassis range.

Variants and Their Codes: What You Need

Fiat-allis built these tractors with a lot of factory options – 16-speed auxiliary reduction units, dry air cleaners, thermo-start aids, cab anchors, and more. The Elenco delle Varianti (variations list) on page 13 assigns a three-digit code to each option. Code 111 gets you the auxiliary reduction unit. Code 188 or 190 for the air cleaner setup. Code 572 for cab anchoring. When you reference the parts explosion for a specific variant, you pull the right bracket, hose, or wiring harness. Without these codes you end up ordering parts that hit the shelf then get returned – wasted time and money.

967 Pages of Factory Part Numbers

This is not a condensed aftermarket catalog that skips the oddball components. 967 pages means every section – engine, transmission, final drive, hydraulics, electrical, steering, PTO – has its own exploded diagram with a numbered callout and a table of part numbers. You need the seal for the 12-speed transmission? The manual lists the exact Fiat-allis number. You need the brake lining for the DT version? It is in there. Aftermarket catalogs often compress several variants into one line, which is how you get the wrong throw-out bearing. This catalog keeps every variant separate.

Does This Manual Cover Engine and Transmission?

Yes. The engine section is in there with all internal parts – pistons, rings, bearings, gaskets, cylinder head components. The transmission section covers both the 12-speed and the optional 16-speed auxiliary reduction unit. Clutch groups are listed by manufacturer (Ferodo or Luk) and by model. The document also includes the starting aid variants (thermo-start and auxiliary starting device). If you need to rebuild the hydraulic pump or the steering box, the part numbers are in the later sections of the book.

Audience Fit: Who Gets Value from This Catalog

If you own a 780 or 780 DT tractor and do your own repairs, you need this. If you run a shop that services these machines, your parts guy needs this. Beginners sometimes think a parts catalog is only for ordering. It also shows you how the assembly goes together. You see the sequence of washers, spacers, and snap rings. That alone prevents assembly mistakes. Professional mechanics working flat rate know that time spent hunting a part number eats into profit – this catalog cuts that hunt down.

Source Validity: Why Factory OEM Beats Aftermarket

Aftermarket parts catalogs for older construction equipment are often recompiled from dealer lists or scanned from user copies. They lose page clarity or skip variant codes. This is a direct scan of the original Fiat Trattori S.p.A. publication, printed in Italy. The model list, chassis numbers, and variant codes are exactly as Fiat-allis released them. The part numbers are the ones stamped on the original castings. If you rely on a third-party cross-reference that says “fits 780” without a chassis range, you are gambling. This catalog gives you the factory data, period.

FAQ

Can I use this catalog for the 780 DT with 16-speed transmission?

Yes. The variant list includes code 111 for the auxiliary reduction unit. That section has separate part numbers for the gears, shafts, and housings specific to the 16-speed setup. Page 13 shows the code; the relevant exploded views are in the transmission chapters.

Does it include the dry-type air cleaner parts?

Variants 188 and 190 cover the dry air cleaner. The catalog pages for the air intake system list the filter element, housing, and brackets by those codes.

How do I find the right clutch?

Look up your chassis number on page 11. Then match the clutch manufacturer (Ferodo or Luk) listed for your chassis range. The catalog gives both numbers.

Is this the complete factory document?

967 pages, full color diagrams. This is the exact document Fiat-allis distributed to dealers. No pages omitted, no reprints of third-party summaries.

You have seen what happens when you order parts from a generic list – the wrong bearing, the wrong seal, the wrong gasket. That costs time and money. Get the factory data before you touch the wrench. Download the Factory Manual for the Fiat-allis 780 and 780 DT Parts Catalog now. You can also check related manuals like Fiat-Allis HD41 Parts Catalog – 370-Page OEM Factory Manual, Fiat-Allis 12G-B 1979 Parts Catalog – OEM Factory Manual 337 Pages, and Fiat-allis 6G Parts Catalog – OEM Factory Manual 559 Pages for other models. For background on the automotive industry, see Automotive Industry Overview and Automotive Industry Overview.