This is the factory Gehl CTL55 service manual (Form 917366) for the CTL55 compact track loader, a 263 page PDF you download and keep. It covers the machine built around the Yanmar 4TNV84T diesel, with full specifications, safety procedures, service data, and step by step disassembly and assembly.With it you can work through the hydraulic and travel systems: gear pump, control valve, sub valve, self level valve, pilot valve, proportional control solenoid valve, cylinders, and travel motor. The Service Data section gives the hydraulic circuit, electrical wiring, and wire harness diagrams, plus tightening torques and fluid capacities.The Troubleshooting section helps you trace faults instead of guessing at parts. Whether you are chasing a hydraulic leak, weak drive performance, or a no start condition, the procedures and reference values are written for the person doing the repair.
What's Inside This Gehl CTL55 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 3-12 | - |
| Service Data | 13-36 | Hydraulic Circuit Diagram, Electrical Wiring Diagram, Wire Harness Diagram |
| Function | 37-78 | Air Conditioner System |
| Disassembly and Assembly | 79-198 | Gear Pump, Control Valve, Sub Valve, Self-Level Valve, Pilot Valve, Proportional Control Solenoid Valve, Cylinders, Travel Motor |
| Troubleshooting | 199-263 | Air Conditioner System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic oil pressure - Travel Right | 26.5 +4.5 -0.5 MPa | p. 20 |
| Hydraulic hose - 1/8 - Union nut (G) tightening torque | 9.8+4.9-0 N·m | p. 28 |
| Hydraulic hose - 1/4 - Taper thread (R) tightening torque | 29.4 ±2.9 N·m | p. 28 |
| Hydraulic oil temperature for measuring performance | 50 to 60°C | p. 22 |
| Cylinder internal leakage limit | 1 mL/3 min or less | p. 174 |
| Engine oil pan capacity (Upper limit) | 7.4 L | p. 18 |
| Hydraulic oil tank total amount of oil | 45 L | p. 18 |
| Engine cooling system capacity | 11.0 L | p. 18 |
| Fuel tank capacity | 57 L | p. 19 |
| Rated engine speed (High) | 2950 ±50 min-1 | p. 15 |
| Maximum torque | 149.4 to 162.8 N·m | p. 15 |
| Hydraulic oil pressure (Travel Right/Left) | 26.5 +4.5/-0.5 MPa | p. 20 |
Gehl CTL55 Common Problems This Manual Covers
Hydraulic cylinder internal leakage
Worn cylinder seals let the lift or tilt cylinders drift or lose holding power, and internal leakage past the piston shows up as slow, weak lift under load. The Disassembly and Assembly section covers cylinder teardown, sealing, and reassembly.
Manual Section: Disassembly and Assembly p. 79Weak drive or attachment power when hot
After warm up the machine can feel sluggish if hydraulic oil is low, aerated, or the cooler is clogged. The Troubleshooting section walks through isolating the cause before you replace pumps or motors.
Manual Section: Troubleshooting p. 199Travel motor drive loss
A track that pulls to one side or loses drive often traces to travel motor wear or damage. The Disassembly and Assembly section documents removing, inspecting, and rebuilding the travel motor.
Manual Section: Disassembly and Assembly p. 79Control valve and solenoid faults
Erratic or unresponsive functions can come from the control valve, sub valve, or proportional control solenoid valve. The Disassembly and Assembly procedures show how to service each valve correctly.
Manual Section: Disassembly and Assembly p. 79No start or hard start
Hard starting on this Yanmar powered loader is usually a battery, starting circuit, or fuel delivery problem, and the manual warns against using ether. The Troubleshooting section helps you check the starting system methodically.
Manual Section: Troubleshooting p. 199Wiring and electrical faults
Intermittent electrical behavior is far easier to chase with the wiring diagrams in hand. The Service Data section provides the electrical wiring diagram and the wire harness layout.
Manual Section: Service Data p. 13Frequently Asked Questions
What machine and engine does this manual cover?
It is the Gehl CTL55 compact track loader service manual, Form 917366, covering the model built with the Yanmar 4TNV84T diesel engine. The PDF runs 263 pages.
Are the hydraulic and wiring diagrams included?
Yes. The Service Data section contains the hydraulic circuit diagram, the electrical wiring diagram, and the wire harness diagram for the CTL55. p. 13
Does it list torque values and fluid capacities?
Yes. Tightening torques, fluid and lubricant charts, and performance criteria are provided, with the reference specifications collected in the Service Data pages. p. 13
How do I get the manual after buying?
You download the PDF straight after purchase, so there is nothing to ship and no waiting. Keep the file and reprint pages whenever you need them.
How quickly can I access this manual after buying?
Instant PDF download. You get the full 263-page searchable Service Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print this manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
Does this Gehl CTL55 manual include wiring diagrams?
Complete wiring diagrams are included, covering all electrical circuits, harness routing, and connector pinouts for the Gehl CTL55.
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