Factory service data for the Gehl CTL55 Compact Track Loader is organized exactly how dealership technicians use it: Service Data, Function, Disassembly and Assembly, and Troubleshooting. This 263-page PDF (OEM #917366) contains full hydraulic circuit diagrams, electrical wiring schematics, and detailed rebuild procedures for the gear pump, control valve, pilot valve, and travel motor. Technicians can verify hydraulic oil temperature at 50 to 60°C before measuring performance, torque 1/4-inch taper thread unions to 29.4 ±2.9 N·m, and limit cylinder internal leakage to 1 mL per 3 minutes. Stop guessing at hydraulic faults. The fully bookmarked file allows instant navigation directly from a tablet or phone.
What's Inside This Gehl CTL55 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 3-12 | Hydraulic Unit, Hoses, Radiator, Accumulator, Battery, Seals |
| 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
Weak drive and sluggish attachment performance on cold morning startups p. 22
Verify hydraulic oil temperature for measuring performance as outlined on page 22. Ensure the system reaches 50 to 60°C before heavy operation. Inspect the 45 L hydraulic oil tank on page 18 for proper fluid levels, draining and replacing the fluid if contaminated.
Manual Section: TroubleshootingLift arm drops spontaneously under load and visible hydraulic fluid leaking near cylinder rods p. 174
Inspect the lift cylinders for damaged seals or scored rods. Measure cylinder internal leakage to confirm it stays at 1 mL/3 min or less as specified on page 174. Torque the 1/8 taper thread hydraulic hose fittings to 11.8 ±1.2 N·m using page 28.
Manual Section: Disassembly and AssemblyTrack loader veering to one side during travel and right travel motor feels weak p. 20
Test the travel right and left hydraulic oil pressure at the test ports. Confirm the pressure reaches 26.5 +4.5/-0.5 MPa as detailed on page 20. Adjust the track crawler tension to maintain exactly 25 to 50 mm of slack.
Manual Section: TroubleshootingEngine turns over slowly or refuses to start completely during freezing weather conditions p. 19
Check the battery voltage and inspect all starting circuit connections for corrosion. Verify the fuel tank holds fresh diesel up to the 57 L capacity listed on page 19. Prime the fuel lines completely to remove trapped air.
Manual Section: Service DataFrequently Asked Questions
How do I troubleshoot a GEHL CTL55 that won’t start?
To troubleshoot a GEHL CTL55 that won't start, follow the 'No operation is possible' flowchart. Begin by checking the hydraulic oil level and adding oil if insufficient. Then, inspect the hydraulic pump for faults, repairing or replacing it or its coupling if necessary. Proceed to check the fuse, proximity switch, lever lock solenoid valve, SUB valve, and pilot valve, repairing or replacing any faulty components as identified. For example, if the hydraulic oil flows out of the pump's discharge port when the engine starts, the pump is normal, but the coupling might be faulty.
What are the torque specs for GEHL CTL55 wheel/track components?
For GEHL CTL55 track components, the check valve for crawler belt tension should be tightened to 59 N·m. The fixing bolts for the track roller and travel motor require a torque of 241 N·m, and ThreeBond #1324 thread-locking compound should be used for these bolts.
What are the replacement specifications for Hydraulic hoses/lines?
When replacing hydraulic hoses, specific tightening torques are required for the union nut (G) and taper thread (R) fittings. For example, a 1/8 inch hose fitting requires a union nut torque of 9.8+4.9 N·m and a taper thread torque of 11.8 ±1.2 N·m. A 1 inch hose fitting requires a union nut torque of 137.3+4.9 N·m and a taper thread torque of 196.1 ±19.6 N·m.
How quickly can I access this Gehl CTL55 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 Gehl CTL55 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.
Document Quality
This document is a scanned PDF with an OCR layer, allowing you to search and copy text. The text quality is generally clear and readable, though some characters exhibit minor scanning artifacts. Diagrams and illustrations are raster images, which means they may pixelate when significantly zoomed, but their labels are mostly legible. Pages are clean with minimal scan artifacts, and no notable stains or skewed pages are present. Be aware that several blank pages are included, likely serving as section dividers or filler.
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