GEHL 980 Parts Catalog – OEM Exploded Views & Part Numbers

Description

If you’re trying to rebuild a GEHL 980 forage box without the factory parts catalog, you’re setting yourself up for a headache. I’ve seen guys order parts based on aftermarket listings and end up with the wrong beater drive gear because the spline count changed mid-production. This is the 54-page GEHL 980 Parts Catalog that GEHL Agriculture published – Form 907592. It gives you the exploded diagrams, reference numbers, and the exact part callouts for every component from the cross conveyor to the Transmission. Before you pull a single bolt, you need this on your bench.

Decal Locations and Serial Number Tracking

Every GEHL 980 has a serial number decal on the right side of the unloading unit above the transmission. The manual tells you exactly where to find it and how to interpret left vs. right (stand behind the unit, looking forward). If you’re ordering parts, the serial number is your key – the PTO telescoping drive changed at SN51299. Page 26–27 covers the after-SN51299 version, page 28 the earlier one. Skip that step and you’ll get the wrong driveline.

54 Pages of Exploded Diagrams

Fifty-four pages, every one an exploded view with reference numbers. The cross conveyor (pages 6–7), beater and conveyor drive (10–13), safety linkage (14–16), and three beaters (pages 17, 18–19, 20–21) are all laid out separately. You don’t have to guess which bushing goes where – the diagram shows the stack-up. Each reference number links to a parts list with descriptions, quantities, and GEHL part numbers. Tear drop symbols tell you where to apply oil; hexagon symbols give torque values in foot-pounds.

What Torque Values Are Listed for Fasteners?

Standard hardware torque specs are printed on the inside back cover. But watch the hexagon symbols in the diagrams – they indicate specific torque requirements for that bolt. For example, the beater transmission on page 32 has a torque callout for the mounting flange. Aftermarket manuals skip those details. I’ve seen a 3rd beater shaft come loose because someone torqued it to “gut feel.” Factory spec or scrap.

Transmission Assembly: Factory Breakdown

The beater transmission (page 32) and worm gear transmission (page 33) are separate sections. The worm gear transmission drives the cross conveyor – page 33 shows the gear case, worm shaft, and output sprocket. The Transmission section also includes the PTO & main drive (pages 8–9) and the beater & conveyor drive (pages 10–13). If you’re replacing a seal or bearing, the reference number ensures you order the correct GEHL part, not a generic substitute.

Get the Right Part Numbers from the Index

Two indexes at the back: alphabetical (page 46) and numerical (pages 47–50). The numerical index lists every part number in the book, sorted numerically. Cross-reference that with the exploded view page – you’ll confirm the part before you call your dealer. The introduction warns that items shown for reference only (no reference number) are not sold separately. That saves you a wasted call.

This manual also covers the box components – side ties (page 35), platforms (36–37), side panels (38–39), ends (40–41), roof (42–43), and transport lights (44–45). The structure is modular so you can isolate the section you need without flipping through unrelated pages. For the cross conveyor extension (30–31) or the standard cross conveyor (29), the part numbers are right there.

I’ve been wrenching since before most of you were born, and I can tell you that the difference between a job that takes a day and one that takes two days is having the factory parts catalog in front of you. No aftermarket PDF matches the original GEHL layout. For a deeper understanding of how the PTO system connects to the tractor’s diesel engine, see this Wikipedia article on diesel engines. And if you need to understand the indexing method, this Wikipedia article on diesel engines covers the basics of diesel powertrains.

Related manuals that follow the same factory format: GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog, GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs, and GEHL RS6-34 2013 Parts Catalog – Factory OEM Manual.

Does this manual cover the 980’s transmission?

Yes, page 32 covers the beater transmission.

How do I identify the correct part number for a cross conveyor chain?

The manual uses exploded views with reference numbers. On pages 6–7, each part has a reference number that corresponds to a parts list with descriptions and quantities. You need to match the serial number of your unit because some components changed after SN51299. The introduction explains how to read the diagrams – pay attention to tear drop symbols for lubricants and hexagon symbols for torque values. Without this manual, you’re guessing which chain link fits. I’ve seen too many jobs go wrong because someone ordered a 46-pitch chain instead of a 48-pitch. Don’t do that.

Stop relying on blurry scans and aftermarket interpretations. This is the original GEHL Parts Catalog – 54 pages, front to back, with every part number and torque spec you need. Access the Factory Manual and keep it on your tablet or print it for the toolbox. Your time and your equipment are too expensive to guess.