GEHL RS10-44/RS10-55/RS12-42/RS6-42/RS8-42 2014 Service Manual

Description

If you’ve ever been halfway through a transmission swap on a telescopic handler and realized the fastener torque you’re using came from some forum post or a photocopied spec sheet, you understand why I’m particular about source material. The GEHL RS10-44, RS10-55, RS12-42, RS6-42, RS8-42 2014 Service Manual is what you need on the bench – not as a PDF on your phone with greasy fingerprints, but as the reference you trust with 498 pages of factory data. This isn’t a reprint or a compilation from three different machines. It’s the OEM document from GEHL, dated January 2014, revision C, form number 913233.

Engine Section 201 – Removal and Installation

Section 201 covers the engine removal and installation procedure for all five models. The manual calls out specific lifting points, cooling system drain steps, and the exact sequence for loosening the flywheel housing bolts. You won’t find any generic “remove engine” sketch here. Each step lists the required tool – like a 1/2-inch drive torque wrench with a range up to 250 ft-lb – and warns you about fuel line pressure. Page 2 of the manual includes the introduction and tells you to contact the Gehl service department if you run into something not covered. That’s how you know this is the real factory document.

Get the Right Torque Data from the Specifications Section

Section 101 (Specifications) lays out fluid capacities, bolt torque values, and hydraulic system pressures. I’ve seen too many boom lift cylinders fail because someone used the wrong tightening sequence on the rod end. The manual gives you the pattern and the final torque for each fastener on the Frame Leveling Cylinder (section 603) and the Tilt Cylinder (section 604). If you’re rebuilding a cylinder, the Hydraulic Cylinder Repair section (605) walks you through seal replacement without guessing clearances. That section alone is worth the price of the manual if you work on these machines regularly.

What’s Covered in the Electrical Section?

Section 301 is the electrical schematic and troubleshooting guide. It covers the starting circuit, alternator output, and the battery removal/installation in section 302. The wiring diagrams are machine-specific – not a generic “typical handler” drawing. If you’ve got a no-start condition or a parasitic draw, you can trace the circuit using the factory wire colors and connector pinouts. Section 301 also includes testing procedures for the steering control valve (section 401) – that’s a common failure point on these RS models.

7 Hydraulic Cylinders Covered

The manual doesn’t stop at basic engine and transmission work. It covers the Frame Leveling Cylinder (603), Tilt Cylinder (604), Stabilizing Cylinder (606 and 607 for repair), Slave Cylinder (608), Lift Cylinder (609), and Boom Extend Cylinders for both 3-section and 4-section booms (610 and 611). Each cylinder section includes removal, disassembly, inspection, and installation with the correct O-ring sizes and seal part numbers. The Hydraulic Cylinder Repair section (605) gives you the general procedure for disassembling any of these cylinders, including the specs for the internal snap ring grooves.

Transmission and Axle Service (Sections 501-503)

Section 501 covers the transmission removal and installation. It references a Manual Transmission type used in these handlers, not an automatic. If you’ve ever had to pull a transmission with the boom still attached, you know the importance of the weight distribution chart in this section. Sections 502 and 503 cover the rear and front axle removal, with the proper jacking points and axle shaft puller requirements. The manual specifies the Manual Transmission fluid type – again, from the factory – not a universal recommendation. Don’t rely on aftermarket data for this.

Steering Control Valve: Factory Procedure Only

Section 401 – the Steering Control Valve – is a good example of why you want the OEM manual. The valve has internal shims and spring tensions that change with wear. The factory procedure tells you the order to remove the spool, the torque for the end cap bolts, and the test pressure to verify operation. Aftermarket manuals often skip these details. This one doesn’t. You get the exact same information the dealer techs use.

Boom and Chain Adjustments – 4-Section Models

The boom sections (701 to 721) are the most machine-specific part of this manual. It covers the Inner Boom Top Chain, Bottom Chain and Roller, the 2nd Intermediate Boom Chain, and the Outer Boom Chain adjustments. Each chain has a tension spec in pounds of force, measured with a chain tension gauge – not “tight enough.” The manual includes the chain adjustment procedure for both 3-section and 4-section boom configurations. If you’re replacing a chain or roller bearing, the sections include the part numbers for the double chain and single chain types.

Source Validity – OEM vs. Aftermarket

I’ve been doing this for 28 years. I’ve seen techs strip threads because they used a torque spec from a third-party manual that was misprinted. This manual is the original GEHL document, printed in the USA, form 913233/CP0114. It’s not a scan of a scan. It’s the same manual you’d get from a dealer. If you want to cross-reference with other models, check the related manuals: GEHL RS10-44 RS10-55 RS12-42 2010 Parts Catalog and GEHL RS10-44 2009 Parts Catalog and GEHL RS6-42 RS8-42 RS8-44 2008 Parts Catalog. Those are parts catalogs, not service manuals – you need both for a complete job.

Does this manual cover the RS12-42 model?

Yes, the manual covers all five models listed in the title: RS10-44, RS10-55, RS12-42, RS6-42, and RS8-42.

What’s the best way to remove the boom extend cylinder on a 4-section boom?

Section 611 covers the Boom Extend Cylinder for 4-section booms. Start by supporting the boom at full extension and relieving hydraulic pressure. The manual shows you the exact order to disconnect the hoses and the bolt pattern for the cylinder mounting flanges. It also specifies the required lifting sling capacity and the sequence for retracting the cylinder after removal to avoid damaging the rod seal. Don’t skip the step about capping the hydraulic lines – the section warns about contamination. Follow the procedure exactly, and you’ll have the cylinder out in under two hours.

This 2014 service manual is the one you want on the shelf next to the machine. 498 pages, factory torque specs, wiring diagrams, and step-by-step procedures for every major system – engine, electrical, valve, transmission, and hydraulic cylinders. Don’t guess. Don’t rely on internet summaries. Access the Factory Manual now and get the OEM data you need to do the job right.