CAT 953 Track Loader Control Linkage Problems Troubleshooting and Solutions

[MikePhua]

The CAT 953 track loader may experience control linkage issues during operation, which can severely impact the machine's performance. The control linkage is a vital component for the loader’s operation, and any failure in these components can result in unresponsiveness or complete failure of the control system. This article analyzes common causes of control linkage problems and provides troubleshooting and solutions.
Common Causes of Control Linkage Problems

1. Control Valve Failure
   The control valve is a key component responsible for controlling the loader’s movements. If the valve becomes stuck, worn out, or leaks, it may fail to transmit operation signals properly, affecting the performance of the control system.
   
2. Linkage or Rod Issues
   The control system of the track loader consists of several linkages and rods. If these parts become bent, worn, or loose, they can cause sluggish or completely unresponsive operation.
   
3. Hydraulic System Failure
   The control linkage system often relies on hydraulic power. If the hydraulic fluid is contaminated, the hydraulic pump is faulty, or there are leaks in the hydraulic system, the pressure may drop, making it impossible for the control system to function properly.
   
4. Electrical System Problems
   If the control system is connected to the electrical system, any electrical failures can impact the control linkage. Common issues include sensor malfunctions, loose electrical connections, or damaged wiring.
   
5. Clogged or Leaking Hydraulic Lines
   Blockages or leaks in the hydraulic lines can prevent hydraulic fluid from flowing properly, affecting the response of the control system. Leaks not only reduce the hydraulic system’s efficiency but also may lead to hydraulic fluid contamination.
   

Troubleshooting and Solutions

1. Inspect the Control Valve
   Check the condition of the control valve to ensure it is not stuck or worn out. If the valve is faulty, clean or replace it. Ensure that the valve’s seals are intact to prevent hydraulic fluid leakage.
   
2. Inspect the Linkages and Rods
   Regularly inspect the linkages and rods in the control system for bending, wear, or looseness. If any parts are damaged, repair or replace them as needed.
   
3. Check the Hydraulic System
   Inspect the hydraulic fluid’s quality and level to ensure it is clean and at the correct level. If the fluid is low or contaminated, replace it with new hydraulic fluid. Check the hydraulic pump and hoses for proper function, and repair any faults found.
   
4. Inspect the Electrical System
   Check the electrical components related to the control linkage system. Ensure that all connections are secure and there are no broken wires. Verify that the sensors are functioning correctly. If any electrical components are faulty, repair or replace them.
   
5. Inspect the Hydraulic Lines
   Regularly check the hydraulic lines for any blockages, wear, or leaks. If any issues are found, clean or replace the hydraulic lines immediately. Keeping the hydraulic system clean will help prolong its lifespan and prevent future problems.
   

Conclusion
Control linkage problems in the CAT 953 track loader can arise from issues in the control valve, linkages, hydraulic system, electrical system, or hydraulic lines. By regularly inspecting and maintaining these critical components, these issues can be effectively prevented, ensuring optimal performance of the loader. If problems persist or cannot be resolved independently, it is recommended to contact a professional technician for further diagnosis and repair.