This Gehl 480 service manual PDF (OEM #918117 Revision A) documents the 2005 All-Wheel-Steer Loader end to end, from the F4M 2011 engine and variable-displacement power train through the axle, brake, steering, and hydraulic systems. Wiring diagrams trace every harness from engine frame to cab; hydraulic schematics map the work circuit, pilot control, and both the 12.5 and 25 mph steering speeds. Exploded views break down axle and loader components. Troubleshooting procedures cover engine and power train faults, the maintenance schedule lists fluid specs and lubrication intervals, and torque tables run from general fasteners to component-specific ones. Wheel nut torque is 295 ±15 lb.-ft. (400 ±20 Nm); the steering cylinder track-rod end takes 148 lb.-ft. (200 Nm). Bookmarked and keyword-searchable, the file opens on any device, so you pin down the spec before you walk back to a down machine.
What's Inside This Gehl 480 Manual
| System | Pages | Key Topics |
|---|---|---|
| Overview | 9-16 | Important Information, Type Decals and Component Numbers, Machine Overview, Cab Overview, Instrument Panel, Multifunctional Lever and Drive Lever: Overview |
| Engine | 65-80 | F4M 2011 Engine: Overview, Engine Oil Cooling, Fuel System, Engine Level 2, Checking and Adjusting Valve Tip Clearance, Replacing the Fuel Injection Pump |
| Power Train | 81-104 | Variable Displacement Pump 12.5 Mph, Hydraulic Motor – Hydraulic Connections 12.5 Mph, Hydraulic Motor – Control Element 12.5 Mph, Power Train Circuit with Cooling 12.5 Mph |
| Axles | 105-128 | Type Decal – Axle, Front Axle Screw Connections, Rear Axle Screw Connections, Drain, Fill and Check Plug – Front Axle, Fill and Check Plug – Rear Axle |
| Brakes | 129-132 | Brake Circuit, Brake Diagram, Service Brake (Important Information on the Brake System, Bleeding the Brake System with Bleed Equipment) |
| Steering | 133-140 | Mph (20 Km/H) Steering Circuit, 25 Mph (40 Km/H) Steering Circuit, Hydraulic Ports on Servostat, Sealing the Steering Cylinder 12.5 / 25 Mph (20 Km/H / 40 Km/H) |
| Hydraulic System | 141-158 | Test Report, Control Valve: Overview – Connections, Work Hydraulics Oil Supply (Priority Valve for Work Hydraulics and Steering), Control Valve, Pilot Control Unit: Design |
| Electrical System | 159-204 | Ohm’s Law; Power, Measuring Equipment, Measuring Methods, Terminal Description, Cable Color Coding (Other Color Codes) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Wheel nut torque | 295 ±15 lb.-ft. (400 ±20 Nm) | p. 25 |
| Track-rod end (steering cylinder) torque | 148 lb.-ft. (200 Nm) | p. 25 |
| Engine Displacement | 190 in.³ (3109 cm³) | p. 17 |
| Engine Output | 59 DIN hp (44 kW) at 2400 rpm | p. 17 |
| Engine Max. Torque | 144 lb.-ft. (195 Nm) at 1700 rpm | p. 17 |
| Intake Valve Clearance (cold) | 0.012'' (0.3 mm) | p. 17 |
| Exhaust Valve Clearance (cold) | 0.020'' (0.5 mm) | p. 17 |
| Engine Oil Capacity | 11 qts. (10.5 L) | p. 27 |
| Hydraulic Oil Tank Capacity | About 17 gal. (65 L) | p. 27 |
| Fuel Tank Capacity | About 21 gal. (80 L) | p. 27 |
| Rated Operating Load (Loader Unit) | 3748 lbs. (1700 kg) | p. 21 |
| Operating Weight | 9921 lbs. (4500 kg) | p. 24 |
Gehl 480 Common Problems This Manual Covers
Gehl 480 loader won't drive or travel is extremely weak, hydrostatic system suspected p. 81
Check hydraulic oil level in the tank; capacity is about 17 gal. (65 L) and overfilling aerates the circuit, collapsing drive pressure. Drain to the full mark if overfull, restart, and cycle the drive pedal slowly to bleed air from the system. Review the variable displacement pump circuit starting at page 81 for pressure test points and control adjustments.
Manual Section: Power TrainHydraulic fluid leaking under cab or around steering valve area, seal failure suspected p. 133
Clean the area completely before assuming it is a hose failure. Inspect O-rings and seals at the hydraulic ports on the servostat and all adjacent connections. When rebuilding the steering cylinder, torque the piston rod to 184 lb.-ft. (250 Nm) and the track-rod end to 148 lb.-ft. (200 Nm); full torque specs are on page 25.
Manual Section: SteeringBoom, bucket, and all auxiliary hydraulic functions suddenly weak or completely unresponsive p. 141
Inspect the main relief valve and priority valve for work hydraulics before chasing individual circuit lines. When all functions fail together, the fault is upstream of every circuit. Verify hydraulic oil level (capacity about 17 gal. / 65 L), then trace the work hydraulics oil supply circuit using the system overview beginning at page 141.
Manual Section: Hydraulic SystemEngine temperature climbs above normal range, cooling system and radiator not yet inspected p. 79
Verify coolant level, then clear debris from the radiator and engine oil cooler faces with compressed air. Inspect the V-belt for proper tension and confirm the thermostat opens at operating temperature. The engine troubleshooting table on page 79 walks through overheating causes step by step, including cooling fan output and airflow restriction checks.
Manual Section: EngineIntermittent electrical faults, warning lights flickering, controls stop responding without clear cause p. 159
Strip battery terminals to bare metal before tracing deeper faults. Measure battery voltage at rest; anything below 12.4V points to a charging system fault. Check wiring harness connectors under the cab for chafing or moisture intrusion. The electrical system section at page 159 provides cable color coding and measurement methods for systematic fault isolation.
Manual Section: Electrical SystemFrequently Asked Questions
What are the torque specs for Gehl 480 wheel loader wheel bolts?
Wheel nut torque on the Gehl 480 wheel loader is 295 ±15 lb.-ft. (400 ±20 Nm). The manual lists this value in its specifications section as a specific tightening torque.
What are the torque specs for the Gehl 480 hydraulic pump or drive components?
For drive components, the input flange screws on the front axle require a tightening torque of 102.5 lb.-ft. (139 Nm) for screw 4 and 52 lb.-ft. (70 Nm) for screw 2. For hydraulic components, the lift and tilt cylinders have a piston tightening torque of 442 lb.-ft. (600 Nm) and a cylinder head torque of 295 lb.-ft. (400 Nm).
how to reset Gehl 480
After replacing the air filter cartridge, you can reset the red mark C in the maintenance display B by pressing reset button A. This is a specific reset for the air filter indicator, not a general machine reset.
Gehl 480 torque specs for wheel loader
General tightening torques for cap screws range from 2 lb.-ft. (3 Nm) for M4 Grade 7 (8.8) to 1696 lb.-ft. (2300 Nm) for M30 Grade 10 (12.9). Specific tightening torques include 295 ±15 lb.-ft. (400 ±20 Nm) for wheel nuts, 148 lb.-ft. (200 Nm) for track-rod ends (steering cylinder), and 184 lb.-ft. (250 Nm) for piston rods (steering cylinder/track rod).
Is this Gehl 480 Service Manual a digital download?
Instant PDF download. The full 204-page searchable Service Manual is yours immediately after payment. Open it on a laptop, tablet, or phone, right in the shop.
Am I able to print pages from this Gehl 480 manual?
Yes, print as many copies as you want. There are no restrictions, and many mechanics print only the section they need to bring to the shop floor.
Does this Gehl 480 Service Manual cover the hydraulic system?
Full hydraulic system diagrams are included, covering circuits, valve locations, and hydraulic component specs for the Gehl 480.
Document Quality
This document is a scanned PDF, not a native digital file. An OCR layer is present, allowing you to search and copy the full text, though the text itself appears slightly less crisp than a native digital document. Diagrams and illustrations are primarily raster images or photos, but labels within them are generally readable. Page condition is clean throughout, with no noticeable scan artifacts, stains, or skewed pages. There are a few "INTENTIONALLY BLANK" pages and "Notes" pages that serve as filler.
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