Bobcat 763 Auxiliary Hydraulic Switch Issue

[MikePhua]

The Bobcat 763 is a well-known skid-steer loader, and users have reported issues with the auxiliary hydraulic system, particularly with the auxiliary hydraulic switch. This problem can be crucial for the proper functioning of various attachments, as the switch controls the flow of hydraulic power to those attachments.
Issue Overview
One common problem with the Bobcat 763’s auxiliary hydraulic system is the failure of the switch, which is responsible for activating the auxiliary hydraulics. In some cases, the switch may stop working entirely, leading to a lack of power or responsiveness in the hydraulic system.
Common Causes of the Problem
Several factors can contribute to the failure of the auxiliary hydraulic switch:

1. Electrical Issues: Wiring problems or faulty connections can interrupt the signal to the hydraulic system, preventing it from functioning properly.
   
2. Switch Malfunction: Over time, the switch itself may wear out or become damaged, causing it to fail.
   
3. Fuse Issues: A blown fuse can prevent the hydraulic system from receiving power, rendering the switch ineffective.
   
4. Hydraulic Fluid: Low or contaminated hydraulic fluid can also affect the system’s performance, causing issues even if the switch is working correctly.
   

Steps for Diagnosis and Repair
If you're experiencing problems with the auxiliary hydraulic switch on your Bobcat 763, here are the general steps for diagnosis and potential fixes:

1. Check the Fuse: Start by checking the fuse associated with the auxiliary hydraulics. A blown fuse is a simple fix and can often resolve the issue immediately.
   
2. Inspect Wiring and Connections: Look for any loose, frayed, or disconnected wires around the switch. Ensuring all connections are tight and free of corrosion can help restore functionality.
   
3. Test the Switch: If the wiring seems intact, the next step is to test the switch itself. This can involve removing the switch and checking for continuity with a multimeter to confirm whether it is functioning.
   
4. Examine Hydraulic Fluid: Ensure the hydraulic fluid is at the proper level and is not contaminated. Low or dirty fluid can lead to system malfunctions.
   
5. Replace the Switch if Necessary: If the switch itself is found to be faulty, it will need to be replaced. This is a relatively simple repair, but it's important to ensure you're using a compatible replacement.
   

Final Thoughts
Maintaining the auxiliary hydraulic system in your Bobcat 763 is essential for ensuring that attachments work efficiently. Regular checks of the hydraulic fluid, fuses, wiring, and switch can prevent costly repairs down the line and ensure the system remains in top working condition. If you're unsure about handling these repairs yourself, it’s always a good idea to consult a professional technician for assistance.
This summary should give you a good starting point if you're facing issues with the auxiliary hydraulic switch on your Bobcat 763.