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Introduction
The Bobcat 864, introduced in the late 1990s, marked a significant advancement in compact track loader design. As one of Bobcat's pioneering models in the compact tracked loader category, the 864, later rebranded as the T200, was built to handle a variety of tasks with its robust hydraulic system and durable construction. However, like all machinery, it is susceptible to issues, particularly concerning its lift and tilt functions. Operators have reported instances where the lift and tilt functions fail to operate, posing challenges on the job site.
Common Causes of Lift and Tilt Failures
The Bobcat 864 is a reliable machine when maintained properly. Addressing lift and tilt function failures promptly by diagnosing common issues such as solenoid malfunctions, sensor interlocks, electrical connector problems, and hydraulic pressure discrepancies can restore its performance. Regular maintenance and adherence to manufacturer guidelines are key to ensuring the longevity and efficiency of the Bobcat 864.
Visual Aid
For a comprehensive visual guide on diagnosing and repairing lift and tilt hydraulic issues on a Bobcat skid steer loader, consider watching the following video:
The Bobcat 864, introduced in the late 1990s, marked a significant advancement in compact track loader design. As one of Bobcat's pioneering models in the compact tracked loader category, the 864, later rebranded as the T200, was built to handle a variety of tasks with its robust hydraulic system and durable construction. However, like all machinery, it is susceptible to issues, particularly concerning its lift and tilt functions. Operators have reported instances where the lift and tilt functions fail to operate, posing challenges on the job site.
Common Causes of Lift and Tilt Failures
- Hydraulic Lock Solenoid Malfunction
A prevalent issue is the failure of the hydraulic lock solenoid, which controls fluid flow to prevent unintended movement. A diagnostic code 17-06 often indicates a "Hydraulic Lock Solenoid Short to Ground," suggesting a faulty or stuck solenoid. Inspecting the solenoid coil for continuity and checking the wiring for damage can help identify this problem.
- Seat Bar or Seat Sensor Interlock
The Bobcat 864 is equipped with safety interlocks, including a seat bar or seat sensor, designed to prevent operation when the operator is not properly seated. If these sensors malfunction or are not engaged correctly, they can lock out the lift and tilt functions. Operators have reported that even without visible indicators, these sensors can cause such issues.
- Electrical Connector Issues
Faulty electrical connections, such as a shorted or disconnected Deutsch connector, can lead to communication failures between the control system and the hydraulic components, resulting in non-operation of the lift and tilt functions. Ensuring all connectors are secure and free from corrosion is essential for proper operation.
- Hydraulic Pressure Problems
Inadequate hydraulic pressure can cause sluggish or non-responsive lift and tilt functions. This can be due to issues like internal leaks in the lift cylinders, worn seals, or problems within the hydraulic control valve. Monitoring the system's pressure and addressing any discrepancies can help resolve these issues.
- Inspect the Hydraulic Lock Solenoid: Check for continuity in the solenoid coil and examine the wiring for any signs of damage or wear. Replacing a faulty solenoid can restore proper function.
- Verify Seat Bar Engagement: Ensure the seat bar is properly lowered and the seat sensor is functioning correctly. Cleaning or replacing the sensor may be necessary if it's malfunctioning.
- Examine Electrical Connections: Inspect all relevant electrical connectors for corrosion, loose connections, or damage. Cleaning or replacing connectors can resolve communication issues.
- Check Hydraulic Pressure: Use a pressure gauge to measure the hydraulic system's pressure. Both lift and tilt circuits should operate within the specified pressure range. Addressing any pressure discrepancies can improve function.
- Regularly Inspect Hydraulic Components: Routine checks of hoses, cylinders, and valves can help identify wear or damage before they lead to failures.
- Maintain Proper Hydraulic Fluid Levels: Ensuring the hydraulic fluid is at the correct level and is free from contaminants is crucial for system performance.
- Use Manufacturer-Recommended Fluids: Utilizing the recommended hydraulic fluid type and brand can prevent compatibility issues and extend component life.
The Bobcat 864 is a reliable machine when maintained properly. Addressing lift and tilt function failures promptly by diagnosing common issues such as solenoid malfunctions, sensor interlocks, electrical connector problems, and hydraulic pressure discrepancies can restore its performance. Regular maintenance and adherence to manufacturer guidelines are key to ensuring the longevity and efficiency of the Bobcat 864.
Visual Aid
For a comprehensive visual guide on diagnosing and repairing lift and tilt hydraulic issues on a Bobcat skid steer loader, consider watching the following video:
