Gehl CTL 85 Low Travel Speed Troubleshooting

[MikePhua]

The Gehl CTL 85, a compact track loader, is designed for tough jobs that require high mobility, traction, and lifting capability. However, some operators experience issues when the loader fails to reach its expected high travel speed. This problem can limit its effectiveness on large job sites, where fast movement across rough terrain is essential.
In this article, we will explore potential reasons for the low travel speed on a Gehl CTL 85, provide a detailed overview of its components, and suggest practical solutions to resolve the issue.
Understanding the Gehl CTL 85
The Gehl CTL 85 is part of Gehl’s series of compact track loaders, known for their rugged design and versatility. These loaders are equipped with an advanced hydraulic system and a reliable diesel engine to perform a wide variety of tasks, such as digging, grading, lifting, and material handling. They are particularly valuable in environments where traction is needed over softer ground, thanks to their track-based undercarriage.
The CTL 85 comes with various features, including:

• Rated Operating Capacity: 2,700 lbs
  
• Engine Power: 85 horsepower
  
• Operating Weight: Approximately 9,500 lbs
  
• Maximum Travel Speed: Around 7 mph (11.3 km/h) in high gear
  
• Hydraulic Flow: 20-25 gallons per minute (depending on model)
  

The high travel speed is critical for improving the efficiency of operations, allowing operators to cover large work areas quickly. When this speed is compromised, it often indicates an issue with one of the key systems within the machine.
Common Causes for Low Travel Speed
Several factors could contribute to a Gehl CTL 85's lack of high travel speed. These include mechanical, electrical, or hydraulic issues. Below are the most common causes:

1. Hydraulic System Problems
   The CTL 85's track drive system is powered by hydraulic motors, which are controlled by the hydraulic fluid pressure. If there is a drop in hydraulic pressure or an issue with fluid flow, the motor may not operate at full capacity, thus limiting the travel speed.
   • Low Hydraulic Fluid Levels: Insufficient hydraulic fluid can prevent the motors from receiving the necessary pressure to operate at high speed.
     
   • Clogged or Dirty Hydraulic Filters: A clogged filter restricts fluid flow, reducing the performance of the hydraulic system.
     
   • Damaged or Worn Hydraulic Hoses: Leaking or damaged hoses can also lower pressure, affecting the speed.
     
   Solution:
   • Regularly check and top off hydraulic fluid levels.
     
   • Change hydraulic filters according to manufacturer recommendations.
     
   • Inspect hoses for leaks or damage and replace them as necessary.
     
2. Track Issues
   The condition of the tracks and undercarriage components can impact the travel speed. Worn-out or improperly tensioned tracks may cause unnecessary resistance, preventing the loader from achieving its maximum speed.
   • Excessive Track Tension: Too much tension can cause friction and reduce the efficiency of the track drive motors.
     
   • Worn Tracks or Sprockets: Excessively worn tracks or sprockets can also create slippage, leading to a loss of speed.
     
   • Track Misalignment: Misaligned tracks can cause uneven wear and drag, slowing down the loader.
     
   Solution:
   • Adjust track tension to the manufacturer’s recommended specifications.
     
   • Regularly inspect tracks for wear and replace them when necessary.
     
   • Check for proper alignment and make adjustments to ensure even track wear.
     
3. Transmission and Drive Motor Issues
   A problem with the transmission or drive motor can result in a significant reduction in travel speed. The drive motor is responsible for transmitting power from the engine to the tracks, so any fault here can directly affect the loader’s speed.
   • Clutch or Gear Slippage: If the clutch or gears are slipping, the machine will not transfer enough power to the tracks.
     
   • Faulty Drive Motors: A failing drive motor can reduce the overall efficiency of the machine, particularly in high-speed settings.
     
   Solution:
   • Have the transmission and drive motors checked for wear or damage.
     
   • Repair or replace damaged gears, clutches, or motors to restore proper power transfer.
     
4. Electronic and Sensor Malfunctions
   The Gehl CTL 85 uses an advanced electronic control system to manage the performance of the loader, including speed settings. Faulty sensors or wiring can cause the system to limit the loader’s speed even when mechanical components are functioning correctly.
   • Speed Control Malfunctions: The electronic speed controller may be malfunctioning, causing the loader to operate in a reduced-speed mode.
     
   • Faulty Sensors or Wiring: Issues with sensors that monitor the machine’s operational parameters, such as load or engine performance, can trigger a speed reduction.
     
   Solution:
   • Inspect all wiring and connections for signs of wear or corrosion.
     
   • Test speed sensors and control modules to ensure they are functioning correctly.
     
   • Reset or recalibrate the system if necessary.
     
5. Engine Power Issues
   A reduction in engine power can also lead to a lower travel speed. The Gehl CTL 85 is equipped with an 85-horsepower engine, and if the engine is not delivering the expected performance, it will affect all operational functions, including speed.
   • Fuel System Issues: A clogged fuel filter or malfunctioning fuel injector can restrict the amount of fuel entering the engine, reducing its power output.
     
   • Air Intake Restrictions: A dirty or clogged air filter can starve the engine of air, leading to a loss of power.
     
   • Exhaust Restrictions: A clogged exhaust system can reduce the engine’s ability to expel gases, affecting performance.
     
   Solution:
   • Clean or replace the fuel filter and air filter regularly.
     
   • Inspect the exhaust system for blockages and clear them as needed.
     
   • Ensure the engine is receiving proper fuel pressure and air flow.
     

Troubleshooting and Testing the Gehl CTL 85
To diagnose the cause of low travel speed, follow these steps:

1. Check Hydraulic Fluid Levels
   Ensure that the hydraulic fluid is at the recommended level. If low, top it off and check for leaks.
   
2. Inspect Tracks and Undercarriage
   Check the tracks for wear, misalignment, and tension. Make necessary adjustments or replacements.
   
3. Test the Drive Motor
   Run the loader through its gears and check for any noticeable loss of power or irregularities in movement.
   
4. Monitor the Engine and Fuel System
   Check the fuel filters, air filters, and exhaust system for any blockages or issues.
   
5. Check Electronics and Sensors
   Run diagnostics on the electronic control system to check for faulty sensors or wiring.
   

Conclusion
Low travel speed on a Gehl CTL 85 compact track loader can result from several factors, including hydraulic system issues, track misalignment, transmission malfunctions, or engine power problems. By following the maintenance tips and troubleshooting steps outlined above, operators can address these issues efficiently and restore the loader’s performance. Regular inspections, fluid checks, and component replacements are essential to prevent further speed reduction and ensure optimal machine efficiency.
Maintaining the Gehl CTL 85 and resolving these issues promptly will increase uptime and productivity, making it a valuable asset on job sites that demand speed and performance.