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Unlocking the Traction Lock on a Bobcat Skid Steer for Towing
#1
Introduction
When a Bobcat skid steer, such as the 763 model, becomes inoperable due to a dead battery or other issues, towing it onto a trailer can be challenging. The traction lock solenoid, a safety feature designed to prevent unintended movement, often remains engaged, making it difficult to move the machine. Understanding how to disengage this lock is crucial for safely transporting the equipment.
Understanding the Traction Lock Solenoid
The traction lock solenoid is a three-wire device typically found on Bobcat machines. It comprises:
  • Black wire: Ground
  • Red wire: Power (pull coil)
  • White wire: Power (hold coil)
To release the traction lock, power must be applied to the red wire to energize the pull coil. Simultaneously, a momentary power pulse to the white wire energizes the hold coil, disengaging the lock. Once released, maintaining power to the red wire keeps the solenoid in the unlocked position. Removing power from the red wire allows the solenoid to re-engage, locking the traction mechanism again.
Steps to Disengage the Traction Lock
  1. Access the Solenoid Wires: Locate the three-wire solenoid near the rear of the machine. The wires are typically color-coded as described above.
  2. Apply Power to the Red Wire: Using a 12V power source, apply voltage to the red wire. This energizes the pull coil, initiating the unlocking process.
  3. Momentarily Apply Power to the White Wire: Briefly apply power to the white wire. This energizes the hold coil, causing the solenoid to disengage and release the traction lock.
  4. Verify Disengagement: Listen for a distinct "click" sound, indicating that the solenoid has released. Attempt to move the machine to ensure the traction lock is disengaged.
Considerations and Cautions
  • Safety First: Always ensure the machine is on a level surface and that no personnel are in the vicinity of moving parts before attempting to disengage the traction lock.
  • Avoid Permanent Modifications: While temporary bypassing methods can be employed, it's essential to address the underlying issue causing the traction lock to engage improperly. Permanent modifications can compromise safety features and may violate regulations.
  • Consult the Manual: Refer to the machine's service manual for specific instructions and wiring diagrams related to the traction lock solenoid.
Alternative Solutions
If accessing the solenoid wires is not feasible, consider the following alternatives:
  • Use a Tow Valve: Some Bobcat models are equipped with a tow valve that, when engaged, allows the machine to be moved without disengaging the traction lock. Consult the operator's manual to determine if your model includes this feature.
  • Seek Professional Assistance: If unsure about performing these procedures, it's advisable to contact a certified Bobcat technician to avoid potential damage to the machine or injury.
Conclusion
Disengaging the traction lock on a Bobcat skid steer is a manageable task with the proper knowledge and precautions. By following the outlined steps and considering safety at all times, operators can safely tow their equipment to the desired location for repairs or maintenance.
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