Description

Fiat-allis 446, 446 DT Parts Catalog

Every time I see someone slap a random bolt into a construction machine and hope it holds, I feel the torque wrench screaming. The Fiat-allis 446, 446 DT Parts Catalog is what gets that right. It’s 649 pages of factory-approved part numbers, exploded diagrams, and the kind of detail that keeps a machine running instead of becoming a yard ornament. You don’t guess part numbers. You look them up.

Engine Group Breakdown (Section 1.04.0)

Section 1.04.0 covers the engine group with full exploded views. You get every gasket set, piston ring, valve, and bearing listed with the exact OEM number. The fuel system splits off into 0.04.0, where you’ll find injector lines, pump components, and filters. Want the charge pressure specs? This is a parts catalog, not a service manual — you get the part numbers, not the torque values. But the diagrams show every seal and O-ring location. Use the part number to order the correct seal, then go to a service manual for the install torque.

Transmission and Drivetrain (Sections 0.12.0, 0.20.0, 0.30.0)

Sections 0.12.0, 0.20.0, and 0.30.0 walk through the transmission, final drives, and rear axle. These are the big money sections. If you’re rebuilding a 446 or 446 DT transmission, you’ll see the exact clutch packs, bearings, and shafts. Fiat-Allis HD41 Parts Catalog – 370-Page OEM Factory Manual covers the bigger brother, but this one is tailored to the 446/446 DT platform. The indexing is consistent across all OEM Fiat-Allis catalogs — once you learn the numbering system, you can navigate any of them.

Hydraulic System (Sections 0.14.0, 0.36.0)

Sections 0.14.0 and 0.36.0 handle the hydraulic pump, control valves, and cylinder assemblies. The 446 DT adds a torque converter circuit that the straight 446 doesn’t have — the catalog marks the different parts with a DT suffix in the section numbers. If your bucket won’t lift, you need the seal kit number. That’s on page for section 0.14.8. The exploded drawing shows every snap ring and backup washer. Don’t cross-reference with aftermarket catalogs — I’ve seen too many wrong O-ring sizes. Stick to the Fiat Trattori original.

3 Systems That Share Parts – Avoid the Cross-Reference Trap

The 446 and 446 DT share about 70% of the parts, but the differences matter. The steering system (0.32.0) and final drives (0.30.0) are identical between models. However the cooling system (0.08.0) has a different radiator and shroud on the DT due to the torque converter oil cooler. Fiat-Allis 12G-B 1979 Parts Catalog – OEM Factory Manual 337 Pages shows the same cooling layout for a different chassis size. The parts catalog uses the factory part numbering scheme — six digits plus a dash and two digits for a variant. If the number ends in -01, it supersedes -00. That’s printed right on the page.

Source Validity – Why OEM Factory Print Beats Aftermarket

This is a genuine Fiat Trattori publication — first edition, printed 603.14.283.02. The Automotive Industry Overview might mention standardization, but nothing standardizes like an OEM parts catalog. The aftermarket reprints often blur the drawings or shrink the text. This PDF is a direct scan from the original. You can read the part numbers clearly at 100% zoom. The catalog includes five languages (Italian, French, German, English, Spanish) on each page — the English column is on the right. Page 9 explains the catalog use and part numbering logic.

When You Need More Than Parts – The Related Manuals

If you’re planning a full rebuild, you’ll want a service manual alongside this parts catalog. The parts catalog tells you what to buy; the service manual tells you how to install it. Fiat-allis 6G Parts Catalog – OEM Factory Manual 559 Pages works for the 6G series but uses a different numbering hierarchy. For the 446/446 DT, this catalog is the only factory-source parts reference. Automotive Industry Overview doesn’t cover parts catalogs, but the principle is the same — trust the original manufacturer’s engineering, not a third-party guess.

FAQ – Quick Answers for the Workbench

Does this catalog list torque specifications for bolts?

Torque values are not in a parts catalog. It shows part numbers and exploded views. You need the Fiat-Allis service manual for torque specs.

How do I find a part number if I don’t know the name?

Start with the section index at the front: Engine (1.04.0), Fuel (0.04.0), Transmission (0.12.0), etc. Open the section and find the exploded drawing. The part number is next to the callout line. Write it down exactly including the dashes — one wrong digit and you get the wrong part.

Is this catalog identical for the 446 and the 446 DT?

Most sections apply to both, but the DT has additional pages for the torque converter, different radiator, and some hydraulic lines. The catalog marks DT-specific items in the section titles. Both models are covered in the same 649-page book.

Can I use this for a Fiat-Allis 8B or other older model?

No. The 446 series uses a different engine and drivetrain layout. Buy the correct catalog for your model. Using this one for a different machine will give you wrong part numbers and wasted money.

You’ve got a machine that needs parts. You’ve got a budget that doesn’t allow mistakes. This catalog gives you the exact OEM numbers from the Fiat Trattori factory. Stop reading part numbers from blurry aftermarket scans. Access the Factory Manual and get the job done right.