GEHL 480T Parts Catalog – OEM Parts Manual (S/N 3421–#918119 C)

If you are pulling wrenches on a GEHL 480T all-wheel-steer loader, you already know the frustration of ordering the wrong part because somebody grabbed a generic cross-reference. The factory Parts Catalog for this machine — beginning serial number 342100107 — is the only document that gives you the exact GEHL part numbers, the correct fastener grades, and the exploded views that show how everything stacks. I have seen too many guys guess on a seal kit and end up with a three-hour teardown just to swap it. This manual stops that nonsense.

108 Pages of Factory Parts Data

The manual covers the 480T from the decals to the throttle pedal, all laid out in 108 pages. You get the Alphabetical Index and the Numerical Index — find a part number in seconds, not by flipping through every section. The Table of Contents lists every assembly: Engine Mounting (page 5), Cylinder Head (page 7), Injection System (page 8), Engine Lubrication (page 9), Fuel Tank (page 12), Air Filter (page 13), Oil Cooler (page 14), and more. Each exploded-view illustration has reference numbers that tie directly to the parts list. You see a circled number? That is a complete assembly — you order the whole thing, not a piece.

Torque Specifications and Fastener Grades

Torque values are printed on the inside back cover. Standard attaching hardware torque specs — in foot-pounds — are there. The illustrations also list metric torque values in Newton-meters; multiply by 0.738 to get foot-pounds. All cap screws and bolts are Grade 8.8, cadmium or zinc plated unless the illustration says different. You will see abbreviations like CS (cap screw), HB (hex bolt), HLN (hex lock nut). The manual also includes a Hydraulic Fitting Data section — critical if you are replacing hoses or fittings and need the correct thread pitch and crush washer. Do not trust a generic chart; use the factory data.

Serial Number Breaks – Why They Matter

This manual covers the 480T with beginning serial number 342100107, revision C. The book explains serial number breaks right in the introduction: (SN → XXXXX) means up to and including that number; (SN YYYYY →) means YYYYY and after. If your loader has a serial number that falls in a different range, you may need the GEHL 480T Service Manual – Factory OEM Specs for the All-Wheel-Steer Loader to cross‑check. The parts catalog lists each component with the specific part number for your serial break — you are not getting a superseded part that does not fit.

Does This Manual Cover the Engine Block and Cylinder Head?

Yes. Sections for Engine Block (page 6) and Cylinder Head (page 7) show every fastener, gasket, and internal component. The engine is a diesel; if you need background on diesel operation, read this Wikipedia article on diesel engines for basic theory. But for parts ordering, stick to this catalog. The Injection System section (page 8) covers injectors, fuel lines, and the pump assembly. Engine Lubrication (page 9) lists the oil pump, filter, and pan parts. These are not generic diagrams — they are drawn from the GEHL factory drawings with the original part numbers.

Real-World Use: Ordering a Seal Kit or Hydraulic Fitting

Say you have a leak at the oil cooler (page 14). The exploded view shows a small bag icon — that indicates a seal kit. The reference number is circled? That is the complete assembly. You order the seal kit by the part number from the Numerical Index, not by guessing the o‑ring size. The Hydraulic Fitting Data section gives you the thread dimensions, so you know if you need an adapter or a straight fitting. You avoid the trip to the parts counter twice. That is the value of a 108-page OEM Parts Catalog.

Source Authenticity: OEM vs Aftermarket Documentation

I have used aftermarket parts catalogs. They often list a generic part number that “fits” twenty models, then you find out the bolt pattern is wrong. This manual is printed by GEHL — Form No. 918119, Revision C. It says right on page 2: “For your safety and continued proper operation, use only genuine GEHL service parts.” The abbreviations table on that page tells you exactly what each fastener abbreviation means (CS, HB, LN, etc.). You are not guessing if a “hex bolt” means Grade 8.8 or 5.8. The factory spec is right there. If you want to double-check the history of diesel engine design, this Wikipedia article on diesel engines is a decent background read — but for the actual parts, go OEM.

Get the Right Part the First Time

You can cross-reference this catalog with other GEHL loader parts if you have multiple models. Check the GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog or the GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs if your shop runs those machines. Each catalog is its own factory document — no generic reprints.

Can I use the torque specs on the inside back cover for all fasteners on the 480T?

Yes, for standard attaching hardware. The inside back cover lists standard torque values in foot-pounds. Metric torque values in the illustrations are in Newton‑meters (convert by multiplying by 0.738).

What if my loader has a serial number outside the range covered (342100107 and up)?

This catalog covers beginning S/N 342100107, revision C. Earlier machines may use different part numbers. Look for the serial number tag on the front cabin panel. If your number falls before that, you need an earlier revision of the parts catalog.

Stop tracking down wrong parts and wasting billable hours. Download the Factory Manual and keep it on your bench. The exploded views, part numbers, and torque specs are all in one place — no hunting through three different aftermarket sites.