Description

GEHL 120 Parts Catalog – Factory OEM Parts Breakdown for Mix-All Mixer

You’re elbow-deep in a Gehl 120 Mix-All, you need a seal or a bearing, and the part number you have doesn’t match anything. That’s exactly why the factory GEHL 120 Parts Catalog exists—84 pages of exploded views, part numbers, and fitment details that aren’t guesswork. I’ve seen guys order three different pulleys before getting the right one because they were working off a photocopy. This manual fixes that. It’s an OEM print from Gehl Company, not an aftermarket rehash. Every illustration, every callout, every hardware note comes straight from the manufacturer.

For background on how the diesel engine that powers these machines works, see this Wikipedia article on diesel engines.

Each assembly group in this catalog is broken down the way Gehl designed it. You get the same view the dealer parts counter has. That means you order the right sprocket, the right bolt, the right hydraulic line the first time. Period.

Transmission Parts Breakdown on Page 5

The Transmission section (page 5) lays out every gear, shaft, and bearing. No generic drawings. Exploded view with callout numbers tied directly to the parts list below. If you need the input shaft seal or a shift fork, you see exactly how it fits and what part number to order. That matters when the machine is down and you have a crew waiting.

Mill Cylinder and Blower: Exploded Views on Pages 19-21

The Cylinder section (page 19) and the Mill Frame and Blower (pages 20-21) cover the heart of the hammer mill. Hammers, screens, blower fan, housing. You’ll find the part numbers for the cylinder shaft, bearings, and blower pulley. Don’t trust aftermarket copies that leave out the washer thickness spec. This catalog gives you the factory numbers.

3 Reasons to Use Factory Parts Documentation

First, aftermarket catalogs often merge serial number breaks. Gehl explicitly separates parts for before/after serial number 1410 and 1411 in the feeder head sections. Second, hardware like bolts and nuts are listed but not illustrated—the note on page 2 explains that mounting hardware isn’t included when ordering just the part. Third, decal locations (pages 3-4) show safety and operation decals. Those aren’t decorative; they’re required for compliance and safe operation.

Does This Manual Cover Hydraulic System Components?

Yes. The catalog includes dedicated sections for the 120SAF Hydraulic Feeder Trough, Hydraulic Feed Drives, Hydraulic Motors, Selector Valves, and Folding Conveyor. Pages 44 through 61 cover hydraulic assemblies. If you’re tracing a leak or replacing a motor, the exploded view shows every o-ring, fitting, and bracket. Don’t mix up the 120MX motor with the 150HF motor—the catalog lists them separately.

Get the Right Part Numbers the First Time

Flip to the Numerical Index at the back. Every part number listed in the front sections is indexed alphabetically. You find a sprocket number on the conveyor drive page, cross-check it in the index, and confirm it’s used in the mixer drive too. That stops the “I ordered two of the same part” mistake. Use the model and serial number from the plate on the frame to narrow down your selection—Gehl stamps that data for a reason.

Related Manuals and References

If you need parts breakdowns for other GEHL equipment, check out GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog and GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs. For the RS6-34 model, see GEHL RS6-34 2013 Parts Catalog – Factory OEM Manual. For more on diesel engine fundamentals, this Wikipedia article on diesel engines covers the basics.

Is this a repair manual or just a parts list?

It is a parts catalog. It does not contain step-by-step repair instructions or torque specs. For those, you need the service manual.

Can I find torque values in this catalog?

No. Torque specifications are not listed in a parts catalog. You’ll need the factory service manual for that data.

Does it cover the hydraulic system?

Yes. There are multiple sections dedicated to hydraulic components: Hydraulic System, Hydraulic Conveyor Drive, Hydraulic Motor sections for 120MX, 150HF, and Selector Valves. Pages 44 and onward show exploded views of pumps, motors, valves, and hose routing. If you’re replacing a motor or a valve spool, the part numbers are there.

How many pages is it?

84 pages of content, including the numerical index at the end.

Don’t waste billable hours chasing wrong parts. Access the Factory Manual now and get the same exploded views and part numbers the dealer uses. Stop the guesswork.