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Bobcat S185 Lap Bar Not Activating Troubleshooting
#1
The Bobcat S185 is a widely used skid steer loader in various industries. One of the safety features of this machine is the lap bar, which ensures the operator is securely seated before the loader can operate. If the lap bar is not activating, it can prevent the loader from starting or functioning properly. This article will guide you through the steps to troubleshoot and resolve issues with the lap bar activation on the Bobcat S185.
1. Symptoms of the Issue
When the lap bar on the Bobcat S185 fails to activate, operators may experience the following symptoms:
  • Loader Fails to Start: The machine will not start or operate because the lap bar is not activated.
  • Error or Warning Lights: Warning lights or error messages may appear on the display, indicating a problem with the lap bar safety switch.
  • Inability to Engage Safety Circuit: The safety system might not be engaging properly, which can prevent the loader from functioning.
2. Common Causes
There are several possible causes for the lap bar not activating on the Bobcat S185:
  • Faulty Safety Switch: The lap bar has a safety switch that detects whether it is in the correct position. If this switch malfunctions or is damaged, it can fail to recognize that the lap bar is engaged.
  • Electrical Connections: Loose or corroded electrical connections can disrupt the signal sent from the lap bar safety switch to the machine's control system, causing the loader to fail to start.
  • Obstruction or Misalignment: If there is any obstruction preventing the lap bar from fully engaging or if it is misaligned, the safety switch may not be triggered.
  • Damaged Lap Bar Mechanism: Over time, the lap bar mechanism may wear out, causing it to not function properly.
3. Troubleshooting and Solutions
If you are experiencing issues with the lap bar not activating on your Bobcat S185, follow these steps to troubleshoot and resolve the problem:
  • Inspect the Safety Switch: Begin by inspecting the lap bar safety switch. Check for any visible damage or signs of wear. If the switch appears faulty, it may need to be replaced.
  • Check Electrical Connections: Inspect all electrical connections related to the lap bar system, including the wires running to the safety switch. Look for any loose, corroded, or disconnected wires. Clean or reconnect any problematic connections.
  • Check for Obstructions or Misalignment: Ensure that the lap bar is properly aligned and able to engage fully. If there is any obstruction preventing it from properly locking into place, remove the obstruction.
  • Test the Lap Bar Mechanism: Manually test the lap bar to ensure it is moving freely and engaging correctly. If the mechanism is damaged, it may need to be repaired or replaced.
  • Inspect the Safety Circuit: If the lap bar is correctly positioned and the switch works, but the loader still fails to start, there may be an issue with the safety circuit. Check the entire safety system to ensure it is functioning properly.
4. Preventive Maintenance Tips
To avoid lap bar activation issues in the future, follow these preventive maintenance tips:
  • Regularly Inspect the Lap Bar and Safety Switch: Periodically check the lap bar mechanism and safety switch to ensure they are functioning correctly.
  • Keep Electrical Connections Clean and Tight: Regularly inspect and clean electrical connections to prevent corrosion and ensure a secure connection.
  • Lubricate Moving Parts: If the lap bar mechanism uses any moving parts, ensure they are adequately lubricated to prevent wear and tear.
  • Check for Wear and Tear: Regularly check the lap bar mechanism and associated components for signs of wear. Replace parts as necessary to maintain optimal performance.
5. Conclusion
The lap bar safety feature on the Bobcat S185 is crucial for the safe operation of the loader. If the lap bar fails to activate, it can prevent the machine from starting or functioning correctly. By inspecting the safety switch, electrical connections, and the lap bar mechanism, you can identify and resolve most issues. Regular maintenance and inspections will help keep the lap bar system in working order, ensuring safe operation of the machine. If the problem persists after troubleshooting, it's recommended to consult a professional technician for further assistance.
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