Searching for a Gehl RS8-44 service manual? This 498-page factory reference (OEM #913233) covers all six RS-Series telescopic handlers: the RS6-42, RS8-42, RS8-44, RS10-44, RS10-55, and RS12-42. Electrical schematics walk the starter circuit, park brake, and steering-mode troubleshooting; hydraulic schematics carry testing and adjustment procedures for every circuit from boom lift to steering pressure. SAE and metric fastener torque charts, standard hydraulic tube torque data, per-model load zone charts, and step-by-step procedures for both 3-section and 4-section boom assemblies round out the reference. The battery should test at 12 to 13 volts; wheel nuts torque to 450 ft.-lbs. (610 Nm). When the machine is down and the clock is running, this bookmarked PDF opens on any device so you can search the spec and start wrenching.
What's Inside This Gehl RS6–RS12 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| 100 - Safety | 5-20 | Safety, Safety Rules and Reminders, Decal Locations (New Decal Application, - Frame and Boom, - Operator Station, - Pwp Equipped Units) |
| 101 - Specifications | 21-40 | Sae Fastener Torque Chart, Metric Fastener Torque Chart, Standard Torque Data for Hydraulic Tubes and Fittings, Indicator and Operation Symbols, Fluid Capacities and Types |
| 201 - Engine | 41-62 | Engine Removal, Engine Installation, Relieving Hydraulic Pressure |
| 301 - Electrical | 63-86 | Instrument Panel or Panel Bulb Replacement, Electrical Schematics |
| 302 - Battery | 87-92 | Battery Removal, Battery Installation |
| 401 - Steering Control Valve | 93-100 | Control Valve Installation |
| 501 - Transmission | 101-116 | Transmission Removal, Transmission Installation |
| 502 - Rear Axle | 117-126 | Rear Axle Removal, Rear Axle Installation, Relieving Hydraulic Pressure |
| 503 - Front Axle | 127-138 | Front Axle Removal, Front Axle Installation, Relieving Hydraulic Pressure |
| 601 - Hydraulics | 139-194 | Hydraulic Schematics, Testing and Adjustment Procedures (Introduction, Hydraulic Specifications), Schematics (Hydraulic Schematics) |
| 602 - Hydraulic Pump | 195-200 | Pump Removal, Pump Installation |
| 603 - Frame Leveling Cylinder | 201-208 | Frame Leveling Cylinder Removal, Frame Leveling Cylinder Installation, Relieving Hydraulic Pressure |
| 604 - Tilt Cylinder | 209-214 | Tilt Cylinder Removal, Tilt Cylinder Installation, Relieving Hydraulic Pressure |
| 605 - Hydraulic Cylinder Repair | 215-224 | Cylinder Disassembly, Cylinder Assembly |
| 606 - Stabilizing Cylinder | 225-230 | Stabilizer Cylinder Removal, Stabilizer Cylinder Installation, Relieving Hydraulic Pressure |
| 607 - Stabilizing Cylinder Repair | 231-240 | Stabilizer Cylinder Disassembly, Stabilizer Cylinder Assembly |
| 608 - Slave Cylinder | 241-248 | Slave Cylinder Removal, Slave Cylinder Installation |
| 609 - Lift Cylinder | 249-262 | Lift Cylinder Removal, Lift Cylinder Installation, Lift Cylinder Adjustment, Check Lift Cylinder Adjustment, Lift Cylinder Eccentric Pin Adjustment |
| 610 - Boom Extend Cylinder (3-Section Boom) | 263-270 | Extend Cylinder Removal, Extend Cylinder Installation, Relieving Hydraulic Pressure |
| 611 - Boom Extend Cylinder (4-Section Boom) | 271-276 | Extend Cylinder Removal, Extend Cylinder Installation |
| 701 - Boom Assembly (3-Section Boom) | 277-286 | Boom Assembly Removal, Boom Assembly Installation |
| 702 - Single and Double Leaf Chain (3-Section Boom) | 287-290 | Leaf Chain Adjustment, Leaf Chain Maintenance |
| 703 - Inner Boom (3-Section Boom) | 291-300 | Relieving Hydraulic Pressure for the Tilt Cylinder and Boom Extend Cylinder, Inner Boom Removal, Inner Boom Installation |
| 704 - Double Chain and Roller Bearing (3-Section Boom) | 301-308 | Double Chain Roller Bearing Removal, Double Chain Roller Bearing |
| 705 - Single Chain and Roller Bearing (3-Section Boom) | 309-316 | Removal, Installation, Single Chain Roller Bearing Replacement |
| 706 - Intermediate Boom (3-Section Boom) | 317-324 | Intermediate Boom Removal, Intermediate Boom Installation |
| 707 - Boom Pad (3-Section Boom) | 325-330 | Slide Pad Locations, Installation of Slide Pads, Boom Pad Replacement Procedure, Slide Pad Maintenance |
| 708 - Overview (4-Section Boom) | 331-336 | Boom Components, Boom Sections, Boom Chains and Rollers, Boom Slide Pads, Hydraulic Hoses and Tubes |
| 709 - Boom Assembly (4-Section Boom) | 337-342 | Boom Assembly Removal, Boom Assembly Installation |
| 710 - 1st Intermediate Boom (4-Section Boom) | 343-352 | 1st Intermediate Boom Removal, 1st Intermediate Boom Installation |
| 711 - 2Nd Intermediate Boom (4-Section Boom) | 353-366 | 2nd Intermediate Boom Removal, 2nd Intermediate Boom Installation |
| 712 - Inner Boom (4-Section Boom) | 367-374 | Inner Boom Removal, Inner Boom Installation |
| 713 - Boom Hydraulic Hose and Tube Replacement (4-Section Boom) | 375-392 | Exterior Boom Hose Replacement, Install New Hoses, Interior Boom Hose Replacement, Inner Boom Hydraulic Tube Removal, Inner Boom Hydraulic Tube Installation |
| 714 - Boom Pad Overview (4-Section Boom) | 393-400 | Slide Pad Sizes, Boom Pad Replacement Procedure, Slide Pad Maintenance |
| 715 - Boom Pad Replacement (4-Section Boom) | 401-430 | Outer Boom (Front -: Top Pads, Side Pads, Bottom Pads) |
| 716 - Overview Boom Chains and Rollers (4-Section Boom) | 431-434 | - |
| 717 - Inner Boom Top Chain (4-Section Boom) | 435-446 | Top Inner Boom Chain Removal, Top Inner Boom Chain Installation |
| 718 - Inner Boom Bottom Chain and Roller (4-Section Boom) | 447-456 | Bottom Inner Boom Chain (Removal, Installation) |
| 719 - 2nd Intermediate Boom Chain and Roller (4-Section Boom) | 457-468 | 2nd Intermediate Boom Chain (Removal, Installation) |
| 720 - Outer Boom Chain and Roller (4-Section Boom) | 469-476 | Outer Boom Chain, Outer Boom Chain Replacement, Outer Boom Chain Roller Bearing Replacement |
| 721 - Boom Chain Adjustment (4-Section Boom) | 477-482 | 4-Section Boom Chain Adjustment |
| 800 - Hood and Cover | 483-498 | Hoods and Covers, Front Hood Removal, Front Hood Installation, Rear Hood Removal, Rear Hood Installation, Radiator Cover Removal, Radiator Cover Installation, Side Door Removal |
Every system also includes mandatory safety shutdown procedure.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel nuts torque | 450 ft.-lbs. (610 Nm) | p. 123 |
| Hydraulic filter type | In-tank return type, 10-micron media, replaceable element | p. 27 |
| Hydraulic filter rated flow | 100 gpm (379 L/min) | p. 27 |
| Battery cold cranking amps | 950 cold cranking amps | p. 26 |
| Battery voltage (test value) | 12 to 13 volts | p. 73 |
| SAE "O" Ring Boss (Steel) fittings torque (Minimum) | Varies by dash and fractional size (e.g., -3 (3/16): 8 Ft-Lbs, -24 (1-1/2): 270 Ft-Lbs) | p. 24 |
| SAE "O" Ring Boss (Steel) fittings torque (Maximum) | Varies by dash and fractional size (e.g., -3 (3/16): 10 Ft-Lbs, -24 (1-1/2): 360 Ft-Lbs) | p. 24 |
| Unified National Thread (Grade 2, Dry) torque | Varies by size (e.g., 8-32: 19 lb-in, 1-14: 210 lb-ft) | p. 23 |
| Unified National Thread (Grade 2, Lubed) torque | Varies by size (e.g., 8-32: 14 lb-in, 1-14: 210 lb-ft) | p. 23 |
| Main relief pressure | 3000 psi (207 bar) | p. 143 |
| Steering relief pressure | 2500 psi (172 bar) | p. 143 |
| Unified National Thread Torque (Grade 8, Dry, 1/2-13) | 110 lb-ft | p. 23 |
Gehl RS6–RS12 Series Common Problems This Manual Covers
Gehl RS6-42 cranks but won't start, or loses power in cold weather p. 65
Trace the starter circuit troubleshooting on page 65. Battery voltage should read 12 to 13 volts; inspect the 60-amp in-line fuse and confirm the fuel shut-off solenoid activates at key-on. The transmission must be in neutral with the park brake applied, since both are start-circuit prerequisites. A battery testing below 950 cold cranking amps needs replacing.
Manual Section: 301 - ElectricalMachine won't select a gear or drive engagement cuts in and out p. 101
Begin at page 65 to rule out start-circuit interlocks, confirming the transmission neutral switch reads correctly. With interlocks cleared, inspect transmission fluid level and check the solenoid wiring for damage. On RS10-44, RS10-55, and RS12-42 machines, transmission capacity is 16.4 qts. (15.5 L); removal and inspection procedures start at page 101.
Manual Section: 501 - TransmissionHydraulic functions on the boom and attachments feel sluggish or stall under load p. 139
Confirm the hydraulic fluid level first; system capacity is 45 gallons (170 L). Main relief pressure should hold 3000 psi (207 bar) per page 143, and if it reads low, inspect the hydraulic pump for wear per page 195. Check the suction strainer (100-micron media, bypass at 3 psi / 21 kPa) for debris before condemning the pump.
Manual Section: 601 - HydraulicsBoom reaches maximum height slower than normal or won't lift at all p. 249
Verify hydraulic fluid sits at full level (45 gal / 170 L) and main relief holds 3000 psi (207 bar) per page 143. Once pressure and pump flow check out, inspect the lift cylinder for internal seal bypass; disassembly and seal replacement procedures begin at page 249. While the cylinder is out, check the eccentric pin synchronization.
Manual Section: 609 - Lift CylinderSteering feels heavy in one or all modes, or won't change modes p. 93
Measure system pressure at page 143: steering relief should hold 2500 psi (172 bar), and if low, inspect pump output per page 195. For mode-change failures, confirm the steering mode solenoid has power, the fuse is intact, and the mode switch tests correctly per the electrical procedures starting at page 63. Check the steering control valve for blockage per page 93.
Manual Section: 401 - Steering Control ValveFrequently Asked Questions
What is the torque spec for the wheel nuts on a GEHL RS series telehandler?
Final torque for the wheel nuts on a GEHL RS series telehandler, including the RS8-44, is 450 ft.-lbs. (610 Nm). That figure holds for both front and rear axles during installation.
How do I reset the transmission / hydraulic system on a GEHL RS series machine?
To prep the hydraulic system for service, fully retract the boom and lower the attachment to the ground. Next, turn the key switch OFF and work the frame leveling joystick in all directions several times to bleed off pressure in that circuit. On the transmission side, the mandatory shutdown procedure calls for placing controls in neutral and setting the parking brake before you kill the engine.
What are the replacement specifications for Hydraulic filters?
The hydraulic filter is an in-tank return type with 10-micron media and a replaceable element. Rated flow is 100 gpm (379 L/min), rated pressure is 100 psi (690 kPa), and by-pass pressure at full flow is 25 psi (172 kPa).
Is this Gehl RS6–RS12 Series Service Manual a digital download?
This is a 498-page searchable PDF that downloads the moment you check out. Open it on a laptop, tablet, or phone, and carry it straight to the shop floor.
Can I print specific sections of this Gehl RS6–RS12 Series Service Manual?
Yes. The PDF carries no DRM restrictions, so print any page or section your shop needs. It works with any standard printer.
Are there wiring harness diagrams in this Gehl RS6–RS12 Series manual?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the Gehl RS6–RS12 Series.
Document Quality
This document is a scanned PDF, providing a digital copy of the original printed material. An OCR layer is present, allowing you to search the full text and copy content from the pages. The text throughout the manual is crisp and consistently easy to read. Diagrams and illustrations are scanned images, which appear clear at normal viewing but may show some pixelation when zoomed in, though labels remain readable. The pages are clean, free of scan artifacts or marks, and maintain a consistent layout. There are several blank pages included, typically serving as section dividers.
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