Knowing When to Replace Wheel Motors on Scissor Lifts and Boom Lifts: A Comprehensive Guide

Introduction

Wheel motors are crucial components of scissor lifts and boom lifts, providing the power and control necessary to maneuver the equipment. Over time, these motors can wear out or become damaged, which may impact the lift's performance and safety. In this blog post, we will discuss when to replace wheel motors on scissor lifts and boom lifts and provide a step-by-step guide on how to do it.

When to Replace Wheel Motors

There are several signs that may indicate it's time to replace the wheel motors on your scissor lift or boom lift:

1. Loss of power or speed: If your lift struggles to move or experiences a significant reduction in speed, the wheel motors may be failing.

2. Erratic or unresponsive controls: Difficulty in controlling the movement of the lift, such as sudden jerking or unresponsiveness, can be a sign of worn-out wheel motors.

3. Excessive noise or vibration: Unusual noises or vibrations coming from the wheel motors may indicate damage or wear.

4. Leaking fluid: Leaking hydraulic fluid from the wheel motor seals is a clear indication that the motor needs attention and may require replacement.

5. Visual inspection: During routine maintenance, inspect the wheel motors for signs of wear, corrosion, or damage. If any of these issues are present, it may be time to replace the motor.

Replacing Wheel Motors on Scissor Lifts and Boom Lifts

Before beginning the replacement process, ensure that you follow all safety precautions, including disconnecting the power source, wearing appropriate personal protective equipment, and working in a clean and well-lit environment.

Step-by-Step Guide to Replacing Wheel Motors:

1. Position the lift: Ensure that the lift is parked on a level surface, with the platform fully lowered and the wheels chocked to prevent movement.

2. Disconnect the power source: Turn off the lift's engine or disconnect the battery to ensure that there is no risk of accidental activation during the replacement process.

3. Remove the wheel: Depending on the lift model, you may need to remove the wheel to access the wheel motor. Use the appropriate tools to remove the wheel lug nuts or bolts and set the wheel aside.

4. Drain the hydraulic fluid: Locate the drain plug on the wheel motor and carefully remove it to drain the hydraulic fluid into a suitable container. Dispose of the fluid according to local regulations.

5. Disconnect the hydraulic hoses: Using a wrench, disconnect the hydraulic hoses from the wheel motor. Be prepared for residual fluid to drain from the hoses and motor. Cap or plug the hoses to prevent contamination.

6. Remove the wheel motor: Unbolt the wheel motor from the lift's drive hub or axle. Carefully slide the motor off the hub or axle and set it aside.

7. Install the new wheel motor: Position the new wheel motor onto the drive hub or axle, ensuring that it is properly aligned. Secure the motor in place using the original bolts and torque them according to the manufacturer's specifications.

8. Reconnect the hydraulic hoses: Reattach the hydraulic hoses to the new wheel motor, tightening the connections securely.

9. Refill the hydraulic fluid: Consult your lift's service manual to determine the appropriate type and amount of hydraulic fluid required. Refill the hydraulic system according to the manufacturer's guidelines.

10. Bleed the hydraulic system: With the new wheel motor installed, it's essential to bleed the hydraulic system to remove any air trapped within the hoses or motor. Follow the manufacturer's instructions for bleeding the system.

11. Reinstall the wheel: Replace the wheel onto the lift, ensuring that it is properly aligned and securely fastened.

12. Test the lift: Once the replacement is complete, reconnect the power source and start the engine. Test the lift's movement and responsiveness to ensure that the new wheel motor is functioning correctly. Pay close attention to any unusual noises or vibrations, as these may indicate the need for further adjustments or inspections.

    Conclusion

    Replacing wheel motors on scissor lifts and boom lifts is an essential maintenance task to ensure the equipment's safe and efficient operation. By knowing when to replace these motors and following the step-by-step guide provided in this blog post, you can effectively maintain your lift's performance and extend its service life. Always consult your lift's service manual for specific instructions and guidelines, and if you are unsure about any aspect of the replacement process, seek assistance from a qualified professional technician.