Description

GEHL AL20DX Parts Catalog – 32-Page OEM Factory Specs

I’ve worked on enough compact loaders to know that a parts catalog is not a novel you read for pleasure. It’s a tool. And GEHL AL20DX Parts Catalog is a specific tool for a specific machine. The AL20DX is an articulated compact utility loader, and this 32-page manual is what you need when ordering replacement parts. Without it, you’re guessing on bolt grades, thread pitch, or fitting types. That costs time and money. This is the OEM factory print, not a third-party rehash.

Page 2 of the manual tells you exactly how GEHL identifies left vs. right (sitting in the seat, facing forward) and where to find the serial number tag (behind the right front wheel). The introduction also states that all cap screws are Grade 5 unless noted and hex nuts are Grade B. That kind of spec matters when you’re torquing a critical joint on the rear chassis. The inside back cover lists standard torque values. I always cross-check those against the actual bolt size before I pull out a wrench.

Torque Specifications: The Inside Back Cover Has What You Need

Torque is not a suggestion. The manual provides standard attaching hardware torque values on the inside back cover. For hydraulic fittings, there’s a dedicated Hydraulic Fitting Data section. I’ve seen guys reuse a hose fitting that looked fine but wasn’t torqued to spec. The result was a weep that turned into a puddle. This catalog saves you that headache because it tells you the fitting data right there. this Wikipedia article on diesel engines explains the basics of diesel power plants, but for the AL20DX you need the specific fitting types listed here.

Alphabetical and Numerical Indexes

Two indexes in one manual. The Alphabetical Index lets you look up parts by name (“hydraulic filter”). The Numerical Index lets you go by part number when you’re staring at a bin tag. That’s the kind of redundancy a pro can appreciate. If you’ve ever spent 20 minutes flipping pages looking for a decal part number, you’ll value this setup. The manual also has a Table of Contents that lists every section, from Decal Locations (pages 2-3) to the Telescopic Boom (page 5) and Front Chassis (pages 6-7).

Does This Manual Cover the Telescopic Boom?

Yes. Page 5 is dedicated to the Telescopic Boom assembly. That section shows an exploded view with reference numbers tied to the parts list. You can identify every bolt, bushing, and seal. The part numbers are genuine GEHL, so you won’t order a metric bolt when you need a Grade 5 cap screw. The manual also warns that replacement tires must be purchased locally – GEHL won’t sell you tires, only wheel sets. Good to know before you call the dealer.

3 Sections That Keep You From Ordering Wrong Parts

First, the Decal Locations (page 2). Decals get sun-bleached or rubbed off. The diagram shows exactly where each decal goes and its part number. Second, the Hydraulic Fitting Data. O-rings vs. flared vs. ORFS – the spec tells you. Third, the Numerical Index. If you have a part number from an old invoice, cross it here to verify it fits the AL20DX Series II. That’s the machine designation on the cover, along with Form No. 918025.

Hydraulic Fitting Data: Save Yourself a Leak

Hydraulic systems on loaders run at high pressure. Using the wrong fitting type or wrong torque will cause a leak at best, a burst line at worst. The manual includes a dedicated Hydraulic Fitting Data section (not paginated separately but referenced in the TOC). That data is factory-verified. Do not trust generic fitting charts from a hardware store. This is OEM data for this specific loader. this Wikipedia article on diesel engines explains the engine cycle, but this catalog gives you the actual part numbers for the hydraulic pump and lines.

If you’re working on other GEHL models, you might need the GEHL AL20DX AL200 Parts Catalog or the GEHL SL4640, SL4840, SL5640, SL6640 2005 Parts Catalog. For the larger skid steers, check the GEHL SL7610, SL7710, SL7810 2005 Parts Catalog – OEM Factory Specs. All are OEM factory documents.

Q: Is this the same as the operator’s manual?

No. This is a parts catalog for ordering parts, not an operator manual.

Q: Can I use this to disassemble the loader?

Not for assembly procedures. This catalog gives exploded views and part numbers. For service steps like removing the boom cylinder, you need a service manual. But for identifying what bolt goes where and its torque, this has that data on the inside back cover. It also lists hydraulic fitting specs which are critical when replacing hoses. I’ve seen guys use standard JIC fittings where ORFS was called for and cause leaks. This catalog tells you the fitting type. So yes, it helps with disassembly if you cross-reference with service manual.

That’s the straight truth about this 32-page parts catalog. It’s a reference tool, not a repair story. If you need to order parts for an AL20DX, get this access from AutoRepairManuals. It’s the factory manual, not a scan. Access the Factory Manual and keep it in your tablet on the bench.