This Gehl SL4510 Gasoline / SL4610 Diesel Skid Loader Shop Manual (OEM #903931) runs 104 pages with one job: getting your machine back to work. It carries hydraulic schematics with full circuit routing, wiring diagrams for both the gasoline and diesel variants, and 40 pages of exploded-view assemblies covering the tandem hydrostatic pump, disc brakes, and drive chain hardware. Nine pages of troubleshooting charts walk the hydrostatic and hydraulic systems, so you trace a fault instead of guessing at it. Before you button things up, set the self-leveling relief valve to 1,200 PSI, the by-pass relief to 1,000 PSI, and torque the pump drive coupling to 30-35 ft-lbs. Bookmarked and keyword-searchable, the PDF opens on any device, so you can pull it up right on the shop floor and start wrenching.
What's Inside This Gehl SL4510 GASOLINE, SL4610 DIESEL Manual
| System | Pages | Key Topics |
|---|---|---|
| Specifications | 5 | Engine SL4510, Engine SL4610, Engine Oil Viscosity Index |
| Safety | 6-7 | Gehl Safety Philosophy, Safety Alert Symbol, Operator Responsibility, Pre-Operation Checklist, Signal Word Definitions, Restraint Bar Warning, Mandatory Safety Shutdown Procedure |
| Decal Locations | 8-9 | New Decal Application, Decal Set Number, Decal List, Front Master Decal Locations, Rear Master Decal Locations, Console Decal Locations, Engine Compartment Decal Locations |
| Towing a Disabled Loader | 10 | Emergency Towing Valves, Towing Procedure, Towing Speed Limitation |
| Lubrication | 11-13 | Oils, SL4510 Gasoline Engine Oil Viscosity Index, SL4610 Diesel Engine Oil Viscosity Index, Hydrostatic Oil Viscosity Index |
| Chassis | 14-21 | Description, Overhead Guard (Removal), Greasing, Grease Fitting Locations, Daily Lubrication Points, 100 Hour Lubrication Points, 500 Hour Lubrication Points (Installation) |
| Drive | 22-36 | Brakes (Disc Brakes Adjustment - Before SN3251-SL4510 & SN3601-SL4610, Disc Brake Replacement - Before SN3251-SL4510 & SN3601-SL4610, Disc Brake Adjustment - After SN3250-SL4510 & SN3600-SL4610, Disc Brake Replacement - After SN3250-SL4510 & SN3600-SL4610, Removal, Installation, Brake Cables - Before SN3251-SL4510 & SN3601-SL4610, Brake Cables - After SN3250-SL4510 & SN3600-SL4610) |
| Hydrostatic System | 37-58 | Introduction, Neutral, Forward, Reverse, Turns, Troubleshooting |
| Hydraulics System | 59-77 | Introduction, Troubleshooting, Hydraulic Component Testing, Tilt Cylinder, Lift Cylinders, Lift & Tilt Cylinders Breakdown, Lift & Tilt System Gear Pump, Hydraulic Oil Filter |
| Electrical System Troubleshooting | 78-81 | Troubleshooting, SL4610 Electrical System Diagram, SL4510 Electrical System Diagram, Light Mounting Kit |
| Engines | 82-102 | Introduction, SL4510 Gasoline-Powered Engine, SL4610 Diesel-Powered Engine, Ordering Engine Parts, Troubleshooting |
| Torque Specifications for Standard Machine Hardware | 103-104 | Torque Specifications Table, Metric Conversion Factors, Hardware Exclusions |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Standard Machine Hardware Torque (3/8 - 16, SAE Grade 5, Dry) | 30 ft. lbs. | p. 103 |
| Hydraulic Filter Element Cleaning Time | 15 to 30 minutes | p. 67 |
| Hydraulic Oil Strainer Installation Torque | hand tight only | p. 67 |
| Hydraulic Hose Torque (Pump Drive Coupling) | 30 to 35 ft-lbs | p. 51 |
| Battery Voltage | 12 Volt DC | p. 5 |
| Hydraulic System Reservoir Capacity | 14 gallon (53 liter) | p. 5 |
| SL4510 | ||
| Fuel Filter Replacement | clean or replace | p. 82 |
| SL4510 Engine Torque | 73.3 ft-lb (101.3 N-m) @ 1900 RPM | p. 5 |
| SL4510 Engine Oil Capacity | 3.5 qt (3.31 liters) | p. 5 |
| SL4610 | ||
| Glow Plug Torque | 10-12 ft-lbs | p. 5 |
| SL4610 Engine Torque | 85 ft-lb (117.6 N-m) @ 1900 RPM | p. 5 |
| SL4610 Engine Oil Capacity | 8.4 U.S. pints | p. 5 |
Gehl SL4510 GASOLINE, SL4610 DIESEL Common Problems This Manual Covers
The SL4510 cranks but won't catch in the cold, or fires up and then stalls under load. p. 82
Inspect the fuel lines, then check the engine oil and top it to the 3.5 qt (3.31 liters) capacity on page 5. Clean or replace the fuel filter per page 82. Test the battery for a steady 12 volt DC supply.
Manual Section: Engines TroubleshootingLift arm won't raise, or the bucket drifts down slowly while you work the main hydraulic controls. p. 59
Check the main reservoir, which should hold the full 14 gallon (53 liter) capacity on page 5. Inspect the self-leveling relief valve pressure on page 60 and confirm 1200 PSI. Pull the hydraulic filter element and clean it for 15 to 30 minutes per page 67.
Manual Section: Hydraulic System TroubleshootingSluggish acceleration, jerky turns, or a left-side drive that lags moving forward and reverse. p. 39
Test the charge pressure relief valve on page 36; it should read between 60-100 P.S.I. Inspect the pump drive coupling and torque the hydraulic hoses to 30 to 35 ft-lbs as shown on page 51. Review page 39 for the neutral adjustment procedure.
Manual Section: Hydrostatic System TroubleshootingStarter won't crank, and gauges or lights on the instrument panel go dead. p. 78
Verify the battery delivers a steady 12 volt DC per page 5. Inspect the alternator output for 37 Ampere. Check the electrical troubleshooting guide on page 78 for loose connections, then test the main ground strap for continuity.
Manual Section: Electrical System TroubleshootingFrequently Asked Questions
What are the torque specs for the Gehl SL4510/SL4610 hydraulic pump or wheel bolts?
Wheel nuts torque from 90 to 110 ft-lbs at installation, per the 'BRAKES' and 'Wheel Bearings' sections. For everything else, use the 'TORQUE SPECIFICATIONS FOR STANDARD MACHINE HARDWARE' table on page 103, which covers most attaching bolts unless a procedure says otherwise. Some fasteners differ: pump mounting support bolts, for instance, run 17 to 20 ft-lbs.
How do I troubleshoot a Gehl SL4510 that won't start?
Start with the electrical system. Confirm the starter circuit fuse hasn't blown (swap in a 25 ampere fuse if it has), the battery connections are clean and tight, and the starter solenoid works. Then check the seat-actuated switch and make sure the operator restraint bar is lowered, since either one can stop the engine from turning over.
How to find Gehl SL4510 torque specs
The 'TORQUE SPECIFICATIONS FOR STANDARD MACHINE HARDWARE' table sits on the inside rear cover, page 103. It lists general values for most Grade 5 attaching bolts; when a procedure calls out its own torque for a given component, follow that figure instead.
What are the replacement specifications for fuel filters?
Both the SL4510 Gasoline and SL4610 Diesel use a fuel filter rated at 10 Micron filtration. You'll find it under the 'Fuel System Filtration' entry in the 'SPECIFICATIONS' section.
What format is this Gehl SL4510 GASOLINE, SL4610 DIESEL manual in?
A 104-page Shop Manual in searchable PDF, ready the moment checkout completes. Open it on a computer, tablet, or phone, with no shipping wait.
Are there any print restrictions on this Gehl SL4510 GASOLINE, SL4610 DIESEL?
Yes. The PDF carries no DRM, so print any page or section your shop needs. It works with any standard printer.
Can I find hydraulic circuit diagrams in this Gehl SL4510 GASOLINE, SL4610?
Yes. It includes full hydraulic schematics with flow diagrams, valve configurations, and pressure specs.
Document Quality
This is a scanned document, not a native digital PDF, but an OCR layer allows you to search and copy text throughout. The text is generally crisp and readable, though some pages show slight variations in print darkness or minor blur from the original source. Diagrams and illustrations are clear scanned images, allowing labels to be read, but they are not vector graphics. Pages are mostly clean, exhibiting minor scanning artifacts like slight skew or faint background discoloration, and there are two blank "NOTES" pages (99 and 100) included at the end.
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