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Bobcat 863F No Auxiliary Hydraulics Issue Troubleshooting - 南汇村长 - 07-04-2025
A user on panswork forum reported an issue with their Bobcat 863F skid steer loader, where the auxiliary hydraulics failed to function. This was a critical issue, as auxiliary hydraulics are essential for powering attachments such as augers, breakers, and grapples. The user shared their troubleshooting steps and findings in an effort to identify and resolve the problem.
Common Causes for Auxiliary Hydraulic Failure
- Auxiliary Hydraulic Control Valve Malfunction
One of the primary suspects in this issue is a malfunctioning control valve. The control valve directs hydraulic flow to the auxiliary hydraulic outlets, and if it's stuck or damaged, it can prevent the auxiliary hydraulics from working properly.
- Faulty Hydraulic Pump
Another possibility is that the hydraulic pump may not be providing sufficient pressure or flow to the auxiliary circuit. A failing pump could result in low pressure or complete loss of hydraulic function.
- Clogged Hydraulic Lines or Filter
Over time, hydraulic systems can accumulate dirt, debris, and contaminants that can clog the lines or filters. This can restrict hydraulic flow and lead to malfunctioning auxiliary hydraulics.
- Electrical Issues or Relay Failures
The auxiliary hydraulics system often relies on electrical relays and solenoids to operate. Any failure in these components could cause the system to fail to engage. A blown fuse, corroded connections, or a faulty solenoid could be the culprit.
- Hydraulic Fluid Levels and Condition
Low or contaminated hydraulic fluid can also lead to hydraulic system failure. It's important to regularly check fluid levels and ensure that the fluid is in good condition to maintain proper hydraulic function.
- Check the Auxiliary Control Valve
Start by inspecting the auxiliary control valve for any signs of damage or wear. If it's stuck or has a blockage, clean or replace the valve as needed.
- Test the Hydraulic Pump
Use a pressure gauge to test the hydraulic pump's output. If the pump is not delivering the proper pressure, it may need to be repaired or replaced.
- Inspect Hydraulic Lines and Filters
Inspect the hydraulic lines for any kinks, leaks, or blockages. Clean or replace filters that may be clogged. It's essential to ensure that the hydraulic fluid is circulating freely through the system.
- Check Electrical Components
Inspect the electrical system related to the auxiliary hydraulics. This includes checking the fuses, relays, and solenoids for any signs of damage. If any electrical component is faulty, replace it as needed.
- Verify Hydraulic Fluid Levels and Quality
Check the hydraulic fluid levels and ensure the fluid is clean and at the proper level. Replace any dirty or contaminated fluid with the manufacturer-recommended type.
The issue with the auxiliary hydraulics on the Bobcat 863F is likely related to a malfunction in the control valve, pump, hydraulic lines, or electrical components. A methodical approach, including checking the valve, pump, fluid levels, and electrical components, should help resolve the problem. Ensuring that the hydraulic system is well-maintained and free of blockages will help prevent future issues with auxiliary hydraulics.