A loader that drifts off line or loses lift usually traces back to a missed chain adjustment or a skipped filter. Built to head that off, this Gehl SL5635 operator manual PDF (document 907845) runs 83 pages across five SL5635 and SL6635 skid loader variants in SX, SXT and DXT trim. Troubleshooting charts sort faults across the electrical, hydrostatic and hydraulic systems, while the service section finishes with wiring diagrams and hydraulic schematics that trace the loader valve circuits. Your controls get their own chapter for T-bar, hand and foot, and dual hand setups, and the maintenance schedule sets intervals for the air cleaner, drive chain, engine oil and fuel filter. Refill the hydraulic reservoir with 16 US gal (60,5 L); main system pressure is 3000 psi (207 bar). One wrong guess on chain tension costs you a sprocket. Bookmarks and a searchable text layer find the right page fast, and the loader goes back to moving material.
What's Inside This Gehl SL5635, SL6635 Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 4-5 | T-Bar Controls, Hand & Foot Controls, Dual Hand Controls, Safety Alert Symbol |
| Model Specifications | 6-8 | Engine, Hydraulic System, Electrical System, Tire Options, Bucket Capacities |
| Checklists | 9-11 | Pre-Delivery Inspection, Delivery Procedures, Loader Engine Test-Run, Hydraloc System |
| Safety | 12-21 | Additional Safety Reminders |
| Controls & Safety Equipment | 22-37 | T-Bar Controlled Loaders, Hand & Foot Controlled Loaders, Dual Hand Controlled Loaders |
| Operation | 38-47 | Loader Operations |
| Adjustments | 48-51 | Control Handles, Throttle Lever, Accelerator Pedal, Drive Chains, Electric Auxiliary Controls |
| Lubrication | 52-54 | Lubrication Locations |
| Troubleshooting | 55-61 | Electrical System, Hydrostatic System, Hydraulic System |
| Service | 62-74 | Operator Services |
| Maintenance Schedule | 75-78 | Air Cleaner, Hydraulic System, Drive Chain, Engine Oil, Fuel Filter |
| Torque Specifications | 81 | Unified National Thread, Metric Coarse Thread, Grade 2 Hardware, Grade 5 Hardware, Grade 8 Hardware |
| Warranty | 82-83 | Warranty Service, Exclusions, Replacement Parts, Labor Costs |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| SL5635SX | ||
| Torque - Maximum (SL5635SX) | 130 ft-lbs (176 N m) | p. 6 |
| SL5635SXT/DXT | ||
| Torque - Maximum (SL5635SXT/DXT) | 176 ft-lbs (239 N m) | p. 6 |
| All Models | ||
| Hydraulic Reservoir Capacity | 16 US gal (60,5 L) | p. 6 |
| Engine Oil Capacity | 10.5 US qts (10 L) | p. 6 |
| Main Hydraulic System Pressure | 3000 psi (207 bar) | p. 6 |
| High Flow Hydraulic System Pressure | 2900 psi (200 bar) | p. 6 |
| Wheel Nut Torque | 170-180 ft-lbs (231-244 N·m) | p. 9 |
| Chaincase Oil Capacity (each) | 8 US qts (7,6 L) | p. 6 |
| Battery | 12 volt DC with 950 CCA min. | p. 6 |
| Starter | 12 volt DC (2.3 kW) | p. 6 |
| SL5635SX, SL5635SXT/DXT | ||
| Fuel Tank Capacity | 19 US gal (72 L) | p. 6 |
| SL6635SXT/DXT | ||
| Fuel Tank Capacity | 24 US gal (91 L) | p. 6 |
Gehl SL5635, SL6635 Common Problems This Manual Covers
Gehl SL5635 and SL6635 skid loader engine turns over on the key but will not start
Check the engine troubleshooting chart on page 57 before you swap parts. Watch the glow indicator lamp at key-on; if it never lights, follow the glow lamp and starter engagement steps on pages 55 and 56. Verify the battery meets the page 6 rating of 12 volt DC with 950 CCA minimum.
Manual Section: Engine Troubleshooting p. 57Engine overheats during steady loading work with the engine temperature gauge reading high
Check the engine overheat steps on page 57, then confirm the temperature gauge is reading true using the gauge checks on pages 55 and 56. Inspect the air cleaner and service the engine oil on the intervals in the maintenance schedule on page 75. An oil change takes 10.5 US qts (10 L), per page 6.
Manual Section: Engine Troubleshooting p. 57Hydrostatic traction drive fails on the right or left side while the other side still pulls
Run the Mandatory Safety Shutdown Procedure and support the raised loader on blocking, never a jack alone, per the Loader Raising Procedure on page 48. Then inspect the drive chains on the dead side and set tension following To Adjust Chain Tension on page 50. Check chaincase oil too; each case holds 8 US qts (7,6 L) per page 6. Verify hydraulic oil level against the 16 US gal (60,5 L) reservoir before working through the Hydrostatic System troubleshooting chart on page 59; relief valve faults there are a dealer job.
Manual Section: Hydrostatic System TroubleshootingHydrostatic drive response turns sluggish and the system runs hot and noisy during long travel
Check hydraulic oil level first; a full reservoir holds 16 US gal (60,5 L), per page 6. Service the hydraulic system on the intervals in the maintenance schedule on page 75, then work the hydrostatic troubleshooting chart for sluggish response, overheating and noise. Trace the circuit on the hydraulic schematic on page 71.
Manual Section: Hydrostatic System TroubleshootingLift and tilt controls fail to respond and the lift arm will not raise or lower
First make sure the restraint bar is lowered and the lift arm support device is disengaged, as the Hydraulic System chart on page 61 lists. Then check the seat and restraint bar switches and the lock solenoid steps on pages 55 and 56; solenoid coil and relay faults are a job for your Gehl dealer. Verify hydraulic oil level against the 16 US gal (60,5 L) reservoir capacity on page 6, then confirm the control pattern for your loader on page 22.
Manual Section: Electrical System Troubleshooting p. 55High flow hydraulics stall out when running a hydraulic attachment under steady working load
Check the attachment hookup and operating steps on page 41, then on hand and foot units verify the Electric Auxiliary Controls adjustment on page 51. Confirm hydraulic oil level against the 16 US gal (60,5 L) reservoir. Compare the attachment's requirements with the page 6 high flow rating of 2900 psi (200 bar); on DX units the Hydraulic System chart on page 61 points to the high flow manifold relief valve.
Manual Section: Hydraulic System TroubleshootingFrequently Asked Questions
What causes a Gehl 5635 to crank but not start?
If the engine turns over but will not start, potential causes include slow cranking speed, a high flow or auxiliary valve being engaged, an empty fuel tank, a faulty fuel gauge sender, a malfunctioning glow module, or a fuel shut-off solenoid that is not energizing. Additionally, the engine oil may not be warm enough, or the ambient temperature may be too low, requiring a pan heater. p. 57
Why is there no response from the hydrostatic drive or lift/tilt systems?
If there is no response from either the hydrostatic drive or the lift/tilt systems, the hydraulic oil viscosity may be too heavy, the hydraulic oil supply may be too low, or there may be a drive coupling failure. You should allow for a longer warm-up period, replace the oil with the proper viscosity, or check the reservoir for low oil levels. p. 58
How do I clear air from the hydraulic system on a Gehl 5635/6635?
To clear air from the hydraulic system, cycle the lift and tilt cylinders to their maximum stroke and maintain pressure for a short time to clear the air from the system. You should also check the hydraulic oil level in the reservoir and fill it as needed. p. 58
What replacement engine oil filter specs fit Gehl SL5635SX, SL5635SXT, SL5635DXT, SL6635SXT, SL6635DXT, SL5635, SL6635?
The replacement part number for the spin-on engine oil filter element is 132023. This part is listed in the Service chapter under the Replacement Parts section. p. 62
What is the required torque for the wheel nuts on the Gehl 5635/6635?
The wheel nuts must be torqued to 170-180 ft-lbs (231-244 N·m). This should be checked every 100 hours of operation. p. 66
Do I get instant access to this Gehl SL5635SX Operator Manual?
You download the Operator Manual yourself: 83 pages, searchable PDF, available immediately. Keep a copy on every device you use.
Can I print this Gehl SL5635SX manual?
Yes. Print the pages or sections you need for your own shop use. Any standard printer works.
Reviews
There are no reviews yet.