LS170 Hydraulic Fluid & Chaincase Fluid Change and Skid Steer Creeping Forward Issue

[MikePhua]

The user encountered an issue with the New Holland LS170 skid steer loader after changing the hydraulic fluid and chaincase fluid. The machine started creeping forward slowly. This problem is often linked to improper hydraulic or drive system settings, fluid quality issues, or problems during the fluid change process. Resolving this issue requires checking the hydraulic system, chaincase, and the fluid replacement process.
Troubleshooting and Solution Steps

1. Inspect the Hydraulic Fluid System
   Hydraulic system issues can cause the machine to creep forward. First, check the type and quality of the hydraulic fluid to ensure it meets the manufacturer’s specifications. If the fluid quality is subpar, it may cause sluggish system response or failure. Verify that the hydraulic fluid level is adequate and that the fluid is not contaminated. If the fluid is contaminated or has aged, a complete fluid change is recommended.
   
2. Check the Hydraulic Fluid Change Process
   When changing hydraulic fluid, ensure that the old fluid is completely drained and that clean, correct fluid is used for the replacement. Any residual old fluid or contaminants may affect the hydraulic system's operation, causing pressure instability or unresponsiveness. Also, inspect the fluid reservoir filter and other filtration systems to ensure they are clean and free from debris.
   
3. Inspect the Chaincase Oil System
   Another possible cause for the creeping forward issue is related to the chaincase oil system. Check the chaincase oil level and ensure that the oil used complies with the manufacturer’s recommendations. Poor quality or insufficient chaincase oil could lead to improper chaincase operation, impacting the skid steer’s overall performance.
   
4. Check the Chaincase Oil Change Process
   Similar to hydraulic fluid, the chaincase oil change process requires fully draining the old oil and ensuring that the new chaincase oil meets the prescribed standards. Check the chaincase's operational state, ensuring there are no unusual sounds or resistance. If any irregularities are noticed, further inspection of the chains or internal components is necessary to check for wear or damage.
   
5. Inspect the Hydraulic Control Valves and Sensors
   Faulty hydraulic control valves or sensors could also cause the machine to creep forward. Use diagnostic tools to check the status of the hydraulic control valves, sensors, and electronic control systems. Look for any leaks or unstable signals. If issues are found, adjust or replace the necessary components.
   
6. Inspect the Drive Control System
   If the above checks do not resolve the issue, examine the drive control system for faults. Sometimes, valve or switch failures within the control system can also cause the machine to creep forward. Ensure all control switches and sensors in the drive system are functioning properly.
   

Conclusion
The creeping forward issue in the New Holland LS170 skid steer is often caused by hydraulic system issues, chaincase oil problems, fluid quality, fluid change procedures, or faults in the control system. By inspecting the hydraulic and chaincase fluid types, the fluid replacement process, checking hydraulic control valves and sensors, and ensuring proper operation of the control system, users can effectively resolve the creeping issue. Regular inspection and maintenance of the hydraulic and drive systems will help improve the machine’s performance and extend its lifespan.