Bobcat 863C Won’t Start After Steering Adjustment: Troubleshooting Guide

[MikePhua]

Introduction
When troubleshooting starting issues in heavy equipment, seemingly unrelated adjustments can sometimes trigger unexpected problems. One such scenario involves the Bobcat 863C skid steer, which failed to start after a steering adjustment. This issue can be frustrating, especially when it seems like the starting system is unaffected by the steering mechanisms. In this article, we will explore the potential causes of this problem, how steering adjustments could influence the starting system, and steps to resolve the issue.
Understanding the Issue
The Bobcat 863C is equipped with an advanced hydraulic system that controls both steering and other machine functions. When the steering system is adjusted, particularly if modifications are made to the steering linkage or hydraulic pressure settings, it can have unintended consequences on other critical systems, including the engine start sequence.
The failure to start after a steering adjustment may be the result of multiple factors, such as electrical issues, hydraulic pressure imbalances, or safety interlocks being triggered. To solve this problem, we need to examine potential causes, starting with the connection between steering adjustments and the engine's starting system.
Possible Causes of the Starting Issue
Several factors could explain why the Bobcat 863C won't start after making steering adjustments. These causes may range from simple electrical issues to more complex hydraulic or safety-related problems.

1. Hydraulic Pressure Imbalance
   One of the key systems that may be impacted by steering adjustments is the hydraulic system. If adjustments to the steering cause a shift in hydraulic pressure or flow, it could prevent the hydraulic system from operating properly, which may affect the engine’s ability to start. For example, if the steering pressure is too high or low, it could affect the starter or safety features tied to the hydraulic circuit.
   • Solution: Inspect the hydraulic system for pressure imbalances and verify that the steering adjustments have not compromised pressure settings. If necessary, recalibrate or reset the hydraulic pressure to factory settings.
     
2. Starter Safety Interlock Triggered
   Many heavy machines, including the Bobcat 863C, have built-in safety features designed to prevent operation under certain conditions. The steering system often has a safety interlock that ensures the machine will not start if the steering system is not correctly adjusted or in the proper position. If the adjustment was not done properly, the interlock may have been triggered, preventing the engine from starting.
   • Solution: Check the safety interlock system related to the steering mechanism. Make sure all components are properly aligned, and reset or deactivate the interlock if needed.
     
3. Electrical Connection Issues
   It’s possible that the steering adjustment has affected the electrical wiring or connections, especially if any components near the steering system were disturbed. Loose or damaged wires can prevent the starting system from functioning properly.
   • Solution: Inspect all electrical connections near the steering system. Ensure that all wiring is intact and properly connected. Pay close attention to connections on the starter solenoid, fuse box, and key switch.
     
4. Fuses or Relays
   The starting issue could be related to a blown fuse or a malfunctioning relay. Electrical issues like this can prevent the engine from starting, and they may be indirectly caused by the adjustments made to the steering.
   • Solution: Check the fuses and relays associated with the starting circuit. Replace any blown fuses or faulty relays and test the machine to see if the issue is resolved.
     
5. Incorrect Steering Adjustment
   If the steering adjustment was not performed according to the manufacturer’s specifications, it may have caused some misalignment or physical obstruction that affects the starting system. For instance, incorrect settings could prevent the machine from fully disengaging the steering or hydraulic locks, which may also affect engine start.
   • Solution: Review the manufacturer’s instructions for the proper steering adjustment procedure. If any mistakes were made during the adjustment, reset the system according to the manual to ensure everything is aligned properly.
     
6. Low Battery Voltage
   Low battery voltage or a weak battery can also be a culprit, especially if the machine has been sitting idle for some time. Steering adjustments often require the use of auxiliary systems that demand power, which could further drain a weak battery and prevent the machine from starting.
   • Solution: Test the battery voltage and ensure it is within the proper range for starting. If the battery voltage is low, recharge or replace the battery.
     

Step-by-Step Troubleshooting
To resolve the issue of the Bobcat 863C not starting after a steering adjustment, follow these steps:

1. Check Hydraulic Pressure
   • Inspect the hydraulic pressure to ensure that it is within the recommended range.
     
   • If there are any hydraulic leaks or pressure imbalances, address these issues first.
     
   • Recalibrate the hydraulic system as necessary to ensure proper function.
     
2. Inspect Safety Interlocks
   • Verify that the steering system is correctly aligned and that the safety interlock has not been triggered.
     
   • Reset or deactivate the interlock mechanism if it is preventing the machine from starting.
     
3. Inspect Electrical Connections
   • Check all electrical connections near the steering system and throughout the starting circuit.
     
   • Look for loose or damaged wires, especially around the starter solenoid, fuse box, and key switch.
     
4. Check Fuses and Relays
   • Inspect the fuses and relays connected to the starting system.
     
   • Replace any blown fuses or faulty relays and test the system again.
     
5. Review the Steering Adjustment
   • Double-check the steering adjustment to ensure that it was performed correctly.
     
   • If there was any misalignment or incorrect adjustment, reset the system to the factory specifications.
     
6. Test the Battery
   • Measure the battery voltage to ensure it is adequate for starting the machine.
     
   • If the battery is weak, recharge or replace it.
     

Preventive Maintenance
To prevent this issue from happening again, consider the following preventive measures:

1. Regular Hydraulic System Inspections
   • Regularly check the hydraulic system for leaks, pressure imbalances, or wear on hoses and fittings.
     
2. Routine Electrical System Checks
   • Inspect electrical connections and fuses regularly to avoid loose or corroded connections.
     
3. Follow Manufacturer Guidelines
   • Always follow the manufacturer’s guidelines for adjustments, especially when working on critical systems like steering and hydraulics.
     
4. Battery Maintenance
   • Keep the battery charged and clean, and replace it as needed to avoid starting issues.
     

Conclusion
A Bobcat 863C not starting after a steering adjustment can stem from a variety of issues, including hydraulic imbalances, safety interlock activation, electrical faults, or improper adjustments. By systematically checking these areas, you can diagnose and resolve the problem effectively. Regular maintenance and attention to the manufacturer’s specifications are essential to prevent such issues from arising in the future, ensuring the smooth operation of the machine and avoiding costly repairs.