Description

Fiat-allis 640, 640DT Parts Catalog – 652 Pages of Factory Documentation

If you are buying parts for a Fiat-allis 640 or 640DT tractor without the factory Parts Catalog, you are ordering blind. I have watched guys spend half a day digging through aftermarket cross-reference lists trying to match a bearing – then they find out they ordered the wrong seal. That time is gone when you have the original FIAT TRATTORI S.p.A. catalog in front of you. This document runs 652 pages, covers every subgroup, and was published by the people who built the machine. No third-party summaries, no reprints, no guesswork.

USE OF THE CATALOG: How to Navigate 652 Pages

Page 9 is where you start. The section titled “USE OF THE CATALOG” walks you through the exact method to find any part. The manual uses a two-step lookup: first find your model in the “ELENCO DEI MODELLI 640-640 DT” list (orange paper, page 11), then locate the variant code from the “verzeichnis der varianten” (page 13). After that, you go to the illustration plates and the corresponding spare parts lists. I have trained new techs on this system – once they understand the code structure, they can pull a part number in under two minutes. That is faster than calling a dealer and trusting their inventory system.

Model Identification: 640 and 640DT Chassis and Engine Codes

The catalog breaks down models by chassis number and engine code. You get separate sections for the 640 and the 640DT. These machines share many components, but the DT (dual track) variant has different final drives and undercarriage parts. The “Modelli” table lists the exact frame serial ranges for each. Never assume a part crosses over – I have seen guys bolt a standard 640 axle housing onto a DT and ruin the track alignment. Check your machine’s serial against the table on page 11, then pull parts accordingly. That single step saves you a return shipment and a week of downtime.

7 Key Sections That Keep You Out of Trouble

This catalog is not a repair manual – it is a parts identification document. But that matters more than you think when every nut and bolt has a factory number. Here is what you get:

• Illustration plates – exploded views of every assembly, from the engine block to the hydraulic controls.
• Spare parts lists – each plate is matched with a numbered list giving description, quantity, and part number.
• Tables of “ÄNDERUNGEN” (changes) – modifications made during production, with effective serial numbers and supersession notes.
• Variant codes – specific options like power take-off configurations or hydraulic pumps.
• Codes numerici – numerical index for part numbers when you only have a number.

If you need to replace a hydraulic hose on a 640DT, you pull the illustration for the “Pompa idraulica” subgroup, read the hose length from the part list, and order the correct assembly. No measuring twice, no guessing.

Parts Cross-Referencing: Why OEM Beats Aftermarket

I have burned through enough aftermarket catalogs to know their limits. They often collapse multiple revisions into one drawing, omit supersession arrows, or skip the “Einführung” date column that tells you when a part was introduced. This OEM catalog uses the Ersatzanweisung (replacement instruction) column to tell you exactly which older part numbers are replaced and whether the new part is interchangeable. That column keeps you from ordering a bracket that does not fit your machine’s build date. For the 640 and 640DT, I have found four different PTO shaft lengths depending on the year – the change table catches every one.

Does This Manual Cover the Fuel System?

The fuel injection components are listed under “Motore” subgroup. You will see part numbers for injectors, fuel lines, and the lift pump. The illustration plates show the routing of return lines, which is critical on the 640DT because the cab enclosure changes line lengths. I have had to re-route fuel lines on a customer’s machine because he based the replacement on a generic diagram. The factory drawing is the only one that shows the correct clamp positions and banjo bolt torque values (those appear in the notes under each subgroup).

What Torque Values Are Listed?

This catalog does not list torque specs for every bolt – that belongs in the workshop manual. But it does give tightening information for certain components in the subgroup notes, especially where part selection depends on torque (e.g., self-locking nuts versus standard nuts). For torque data, you need the separate FIAT workshop manual. I keep both on hand. The parts catalog gets you the right fastener; the workshop manual tells you how tight. Without both, you are guessing.

Get the Right Part Number – Access the Factory Manual

Stop wasting time on online cross-reference databases that show the wrong supersession chain. This Fiat-allis 640, 640DT Parts Catalog is the exact document used by FIAT TRATTORI dealers when ordering components. It is a scanned OEM file, not a reprint or a condensed version. 652 pages of factory part numbers, illustration plates, change tables, and variant codes. Access the Factory Manual now, and never second-guess a part number again.

Related manuals you may need:

• 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

For more background on heavy equipment documentation, see Automotive Industry Overview and Automotive Industry Overview.

Frequently Asked Questions

Is this the same catalog a Fiat dealer would use?

Yes. This is the original FIAT TRATTORI S.p.A. catalog, 2nd edition, part number 14314002973. It is the same document used at dealership parts counters for ordering components.

Can I use this catalog to rebuild the engine?

No. This is a parts catalog, not a service manual. It helps you identify and order correct parts. For rebuild procedures, you need the FIAT workshop manual.

How do I find a part number if I only have the old part in hand?

Start with the numerical index at the back of the catalog (Codici numerici). If the part has a number stamped on it, look it up there. Otherwise, identify the machine serial and use the model list to locate the correct illustration plate.

What if my 640DT has a non-standard attachment like a backhoe?

The catalog covers optional equipment via the variant code system (page 13). If the attachment was factory-installed, it will have a variant code. Non-Fiat attachments may not appear; you will need the attachment manufacturer’s parts list.