CAT 279C Forward and Rearward Motion Slows to a Creep

[MikePhua]

A user on the Panswork forum reported that their CAT 279C track skid steer loader has been experiencing slow forward and rearward movement, to the point where it almost comes to a complete stop or moves at a creeping speed. The user is looking for potential causes and solutions to this issue.
Potential Causes
Several potential causes for the issue were discussed:

1. Hydraulic System Issues
   The hydraulic system is one of the most common causes of this type of problem. The CAT 279C relies on its hydraulic system to drive the tracks. If there is a lack of hydraulic oil or if there is a leak in the system, it may cause the hydraulic pressure to drop, leading to slower movement.
   
2. Contaminated or Old Hydraulic Oil
   Contaminated or degraded hydraulic oil can cause poor flow characteristics, resulting in decreased hydraulic system efficiency. If the filters or pumps in the hydraulic system become contaminated, it may prevent the system from delivering sufficient power, resulting in slow movement.
   
3. Drive Motor Malfunction
   A faulty or worn-out drive motor is another possible cause. If the drive motor is not working properly, the machine may struggle to produce the necessary force to move, leading to slow or reduced movement.
   
4. Transmission System Problems
   If there is an issue with the transmission, such as a loose chain or worn gears, it may prevent the power from being effectively transferred to the tracks, causing the machine to move very slowly or become sluggish.
   
5. Control System Malfunctions
   A problem in the control system can also cause the skid steer to fail in accelerating or decelerating properly. If the electronic components or sensors in the control system are malfunctioning, they could result in abnormal movement speeds.
   

Solutions
Based on the potential causes, here are several suggested solutions:

1. Check the Hydraulic System
   Check if the hydraulic oil is at the correct level and ensure that it is not contaminated. If there is any issue with the oil, replace it, and inspect the hydraulic filters and pumps to make sure they are functioning properly. Additionally, inspect the system for any leaks, and ensure there are no leaks in the hydraulic lines or fittings.
   
2. Replace Hydraulic Oil
   If the hydraulic oil is old or contaminated, it should be replaced with fresh, high-quality hydraulic fluid. This can improve the system's performance and restore the machine's movement efficiency.
   
3. Inspect the Drive Motor
   Inspect the drive motor for any signs of wear or malfunction. If the drive motor is not working properly, it may need to be repaired or replaced.
   
4. Check the Transmission System
   Inspect the transmission system, including the gears, chain, and other moving parts. If there is any wear or looseness in the system, it may need to be repaired or replaced.
   
5. Inspect the Control System
   Ensure that the control system is functioning properly by inspecting the electrical components, sensors, and wiring. If there are any issues, repairing or replacing the faulty components should solve the problem.
   

Conclusion
The slow forward and rearward motion issue on the CAT 279C track skid steer may be caused by issues in the hydraulic system, contaminated hydraulic oil, a malfunctioning drive motor, transmission problems, or control system malfunctions. By inspecting and repairing the hydraulic system, replacing old or contaminated hydraulic oil, and ensuring the proper functioning of the drive motor and transmission, you can likely resolve the issue and restore the machine's performance.