Hydraulic Failures in Mustang MTL20, Gehl CTL70, and Takeuchi TL140: Causes and Solutions

[MikePhua]

Hydraulic failures are a common issue that can significantly impact the operation of compact track loaders (CTLs) like the Mustang MTL20, Gehl CTL70, and Takeuchi TL140. These machines rely on hydraulics for everything from lifting heavy loads to operating attachments, so any hydraulic malfunction can lead to reduced efficiency and costly downtime. This article explores the common causes of hydraulic failures in these models, offers troubleshooting tips, and provides solutions to keep them running at their best.
Understanding Hydraulic Systems in Compact Track Loaders
Compact track loaders like the Mustang MTL20, Gehl CTL70, and Takeuchi TL140 are essential pieces of equipment in construction, landscaping, and agricultural operations. These machines are powered by sophisticated hydraulic systems that drive various functions such as arm movement, lifting, and attachment operation. The hydraulic system consists of the hydraulic pump, valves, fluid, filters, hoses, and cylinders, which work together to provide the necessary power to perform tasks.
When a hydraulic failure occurs, it often affects one or more of these components, and pinpointing the root cause can be a challenge. Hydraulic issues in these models can range from minor leaks to major failures like complete loss of power to hydraulic systems.
Common Hydraulic Failures in the Mustang MTL20, Gehl CTL70, and Takeuchi TL140

1. Loss of Hydraulic Power
   A common issue faced by operators of these CTLs is a loss of hydraulic power. This can manifest as a lack of lifting capacity, weak or erratic movement of attachments, or sluggish loader arm function.
   • Possible Causes:
     • Low Hydraulic Fluid: Insufficient hydraulic fluid levels can result in a lack of pressure, leading to power loss.
       
     • Contaminated Fluid: If the hydraulic fluid becomes contaminated with dirt or debris, it can clog filters and cause performance issues.
       
     • Faulty Hydraulic Pump: A damaged or worn hydraulic pump may fail to generate the necessary pressure, leading to reduced performance.
       
   • Troubleshooting Steps:
     
     1. Check the hydraulic fluid level and top it off if necessary.
        
     2. Inspect the hydraulic fluid for contamination. If the fluid appears dirty or milky, it may need to be replaced.
        
     3. Test the hydraulic pump for proper function. If the pump is not generating pressure, it may need to be repaired or replaced.
        
2. Hydraulic Leaks
   Leaks in the hydraulic system are another frequent issue that affects the performance of the Mustang MTL20, Gehl CTL70, and Takeuchi TL140. Leaks can occur in various parts of the system, including hoses, fittings, and seals.
   • Possible Causes:
     • Worn Seals or O-Rings: Over time, seals and O-rings can wear out, leading to leaks in the hydraulic system.
       
     • Damaged Hoses: Hydraulic hoses can crack or rupture due to wear and tear, resulting in fluid leakage.
       
     • Loose Connections: Improperly tightened or damaged fittings can cause fluid to leak out.
       
   • Troubleshooting Steps:
     
     1. Perform a visual inspection of all hydraulic hoses, fittings, and connections to identify any signs of wear or damage.
        
     2. Tighten any loose fittings or connections.
        
     3. Replace any damaged hoses or worn seals. Be sure to use OEM (Original Equipment Manufacturer) parts to ensure proper sealing.
        
3. Erratic Hydraulic Function
   Sometimes, the hydraulics in these CTLs may function erratically, such as the loader arms moving unevenly or the attachments operating inconsistently. This could be a sign of several underlying issues within the hydraulic system.
   • Possible Causes:
     • Air in the System: Air trapped in the hydraulic lines can cause inconsistent performance, such as jerky movements or erratic attachment function.
       
     • Faulty Control Valve: A malfunctioning control valve can disrupt the flow of hydraulic fluid, leading to erratic behavior.
       
     • Dirty Filters: A clogged hydraulic filter can impede fluid flow, resulting in poor or erratic performance.
       
   • Troubleshooting Steps:
     
     1. Bleed the hydraulic system to remove any trapped air. This process involves operating the hydraulic controls to allow air bubbles to escape from the system.
        
     2. Inspect and clean the hydraulic filter. Replace it if it appears damaged or excessively clogged.
        
     3. Test the control valve for proper operation. If the valve is faulty, it may need to be cleaned or replaced.
        
4. Overheating of Hydraulic System
   Overheating is another serious issue that can cause hydraulic failures in these loaders. Overheated hydraulic fluid loses its lubricating properties, leading to increased wear on system components and reduced efficiency.
   • Possible Causes:
     • Low Fluid Levels: Insufficient fluid can cause excessive friction in the system, leading to overheating.
       
     • Clogged Coolers or Heat Exchangers: A clogged cooler or heat exchanger prevents proper cooling of the hydraulic fluid.
       
     • Excessive Load or Prolonged Operation: Operating the machine under heavy loads for extended periods can lead to hydraulic overheating.
       
   • Troubleshooting Steps:
     
     1. Check the hydraulic fluid level and top it off as necessary.
        
     2. Inspect the hydraulic cooler and heat exchanger for blockages or debris. Clean or replace components as needed.
        
     3. Avoid operating the loader under excessive load for extended periods, especially in hot weather.
        

Preventive Maintenance Tips for Hydraulic Systems
Preventing hydraulic issues in the Mustang MTL20, Gehl CTL70, and Takeuchi TL140 is key to ensuring their longevity and optimal performance. Regular maintenance can prevent many common hydraulic failures and reduce the risk of costly repairs. Here are a few preventive maintenance tips:

1. Regular Fluid Checks: Routinely check the hydraulic fluid level and condition. Change the hydraulic fluid and filters at the manufacturer-recommended intervals to ensure optimal performance.
   
2. Inspect Hoses and Connections: Regularly inspect hydraulic hoses and connections for signs of wear, cracking, or leaks. Tighten any loose connections and replace damaged hoses immediately.
   
3. Clean or Replace Hydraulic Filters: Dirty filters can restrict fluid flow and reduce performance. Clean or replace the filters as part of routine maintenance.
   
4. Proper Loading and Operation: Avoid overloading the machine or operating it under extreme conditions for extended periods. Proper operational practices can help reduce strain on the hydraulic system and prevent overheating.
   

Conclusion
Hydraulic failures in compact track loaders such as the Mustang MTL20, Gehl CTL70, and Takeuchi TL140 can lead to significant downtime and costly repairs if not addressed promptly. Understanding the common causes of hydraulic issues, such as low fluid, leaks, or faulty components, is essential for diagnosing and resolving these problems. By following the troubleshooting steps outlined above and implementing preventive maintenance practices, operators can keep their machines running smoothly and reduce the risk of hydraulic system failures. Regular inspections, fluid changes, and attention to the hydraulic system will help extend the life of these versatile machines and ensure they perform at their best.