Description

GEHL 4640E, 5240E, 2056 2012 Service Manual

Aftermarket manuals that skip the GEHL 4640E, 5240E, 2056 2012 Service Manual safety procedures or give you generic torque values get guys hurt. I’ve seen it. A lift arm drops because somebody used a knock-off manual that left out the lock pin sequence. This 263-page factory OEM print from Gehl gives you the exact steps the factory trained techs follow. If you’re wrenching on a 4640E Power2, 5240E Power2, or a Mustang 2056 Series II with the Tier 4i Yanmar 4TNV98-ZNMS2 engine, this is the only document you should have on your bench.

Mandatory Safety Shutdown Procedure

Page 6 of this manual covers the Mandatory Safety Shutdown Procedure. That’s not a suggestion. You turn the keyswitch to OFF, remove the key, and take it with you before you crawl under the loader. The manual calls out the exact order: lower the bucket, kill the engine, cycle the hydraulics with the key ON but engine off. Skip that step and you’ve got stored pressure waiting to kick you in the teeth. I’ve got a dent in my toolbox from a guy who thought “close enough” was good enough. It’s not.

Lift Arm Support Device: Proper Engagement and Disengagement

This chapter runs from page 7 onward and spells out every pin, lock, and solenoid valve step. For Gehl models you press and hold the lock pin button to release the mechanism. Mustang models use a different lock pin removal – no button. Page 8 shows the exact angles for the support device engagement. If you reverse the steps, you’re trusting the solenoid valve to hold the lift arm. That valve can fail. The factory procedure forces you to physically block the cylinder rod. I’ve used that sequence dozens of times – it works. The manual also includes the disengagement warning: raise the lift arm completely, turn off the engine, remove the key, and verify the solenoid hold before you touch the pin. One guy I know skipped the verification step and the arm dropped six inches while he was reaching for the support device. He’s fine. His pants aren’t.

Specifications and Torque Values

The specifications section on page 1 lists angle measurements for chassis components – 43°, 24°, 88° etc. – that you’ll need for alignment checks. But the real gold is in the torque specs scattered through the procedures. You want the charge pressure for the hydrostatic drive? It’s buried in the troubleshooting section. The manual doesn’t hand you a giant table on the first page; you have to read the relevant chapter. That’s how OEM manuals work. They don’t spoon-feed you. If you’ve been relying on an aftermarket booklet that says “tighten until snug,” throw it away. Factory data is the difference between a leak-free joint and a comeback job. If you need the companion manual for the GEHL Z45 450Z, check out GEHL Z45 450Z 2012 Service Manual – Factory OEM Specifications. For the SL5635 and SL6635 models, grab GEHL SL5635, SL6635 Service Manual – 198-Page Factory OEM. And the SL7810E from 2006 is covered in GEHL SL7810E 2006 Service Manual – OEM Skid-Steer Repair.

Does This Manual Cover the Mustang 2056?

Yes. The cover says “Gehl 4640E Power2, Gehl 5240E Power2, Mustang 2056 Series II.” The whole manual applies to both brands because they’re built on the same platform with the same Yanmar engine. The safety procedures have separate steps for Gehl vs Mustang models where the lock pin mechanisms differ. Every illustration and torque spec matches both. I’ve used this manual to repair a 2056 and a 4640E side by side – the only difference was the support device engagement. That’s it.

Source Authenticity: Why OEM Factory Print Matters

This is a legitimate 2012 factory release from Gehl (form number 50950037, Revision A). It’s not a photocopy of a photocopy. OEM documentation comes with the original signal words – DANGER, WARNING, CAUTION – exactly as the factory engineers wrote them. Aftermarket shops often strip those warnings to save paper. Then a technician misses the “WARNING: Do not work under the lift arm without engaging the support device” and ends up in the emergency room. I’ve seen guys try to rebuild a Manual Transmission without factory specs – that’s a recipe for stripped gears. Same principle applies to skid-steer hydraulics. The 263 pages here include the exact hydraulic pressure relief procedure, the ROPS/FOPS raising and lowering steps, and the jack stand placement for blocking the loader. No generic “support the machine safely” nonsense – it tells you to place two jack stands parallel with but not touching the rear tires. That level of detail is why you buy factory. If you’re working on the hydrostatic drive instead of a Manual Transmission, the procedures differ completely, and this manual has them.

Frequently Asked Questions

Does this service manual include torque specs for the Yanmar engine?

Yes. Torque values are listed in the engine-specific chapters. You need to read the procedures – the manual does not have a single master torque table that covers everything. That’s how factory manuals work.

Will this manual work for my 2010 GEHL 5240?

No. This manual is for the 2012 model year with the Tier 4i Yanmar engine. Earlier models use a different engine and hydraulic system. Using this manual on a 2010 could lead to incorrect torque specs and safety steps.

How many pages is the manual?

263 pages.

What safety procedures are unique to this manual that aren’t found in aftermarket versions?

The lift arm support device engagement and disengagement procedures are the biggest. Aftermarket manuals often condense the process into two bullet points. This manual gives separate, detailed sequences for Gehl and Mustang models, including the solenoid valve check and the exact pin removal steps. It also includes the mandatory safety shutdown procedure that tells you to remove the key and take it with you – a step many aftermarket books omit entirely. The ROPS/FOPS raising and lowering procedure with the self-actuating lock mechanism is another section that’s frequently butchered in generic reprints. The factory version includes warnings that cover the exact risk if you skip a step.

You need the real thing. Don’t trust a reprint that leaves out the lock pin engagement steps or guesses at the charge pressure. Access the Factory Manual and put it on your workbench. Your safety – and your customer’s equipment – depends on having the correct OEM data.