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+--- Thread: How to Disconnect the Final Drive from a Kubota KX121-3 Excavator (/thread-5875.html)
How to Disconnect the Final Drive from a Kubota KX121-3 Excavator - MikePhua - 07-01-2025
When performing maintenance on a Kubota KX121-3 mini excavator, disconnecting the final drive system can be a crucial task. The final drive system is responsible for the machine's movement, and issues with this system can hinder its performance. This article provides a guide on how to disconnect and remove the final drive from a Kubota KX121-3 mini excavator.
1. Preparation
Before starting the disconnection process, make sure you have the necessary tools and equipment for the job to ensure safe and efficient disassembly.
- Tools Required: Common tools include wrenches, bolt removal tools, hydraulic equipment (like a hydraulic jack), and support stands.
- Safety Measures: Ensure the excavator is on a flat surface, and the power is turned off. Use support stands to stabilize the machine to prevent accidents during the disconnection process.
Before disconnecting the final drive, you’ll need to remove the track.
- Loosen the Track Tensioning Mechanism: Use the proper tools to loosen the track tensioning mechanism to slacken the track.
- Remove the Track: Once the track tension is relieved, carefully remove the track to prevent any damage.
The drive motor is an important part of the final drive system. Disconnecting it requires careful handling to avoid damaging the motor or its components.
- Disconnect Hydraulic Lines: Start by disconnecting the hydraulic hoses connected to the drive motor. Use hydraulic tools to release any pressure within the lines to avoid leaks.
- Remove the Drive Motor Bolts: Use wrenches or power tools to remove the bolts securing the drive motor. Gently pull the motor away from its mounting point.
Removing the final drive unit is a critical step. Proceed carefully to avoid damaging any other parts.
- Remove the Securing Bolts: The final drive unit is typically secured with multiple bolts. Use appropriate tools to remove these bolts.
- Gently Remove the Final Drive: Once the bolts are removed, gently pull out the final drive unit, ensuring no other parts are damaged. Hydraulic assistance may be needed to loosen and remove the drive unit.
After removing the final drive, it’s a good practice to inspect and maintain the associated parts to ensure they function properly when reassembled.
- Inspect the Drive Motor and Gearbox: Check the drive motor and gearbox for any signs of wear or damage. If excessive wear is detected, parts may need to be replaced.
- Clean and Lubricate: Clean all the removed parts thoroughly, ensuring no dirt or debris enters. Apply proper lubrication to relevant components to reduce friction and extend their lifespan.
When reinstalling the final drive, ensure each step is done correctly for proper functionality.
- Install the Final Drive: Carefully place the final drive unit back into position, aligning it with the mounting holes and connecting points.
- Secure the Bolts: Use wrenches or power tools to tighten the bolts and secure the final drive unit in place.
- Reconnect the Drive Motor: Reconnect the hydraulic hoses and ensure there are no leaks.
After reinstalling the final drive, it’s essential to perform tests and adjustments to ensure everything is working properly.
- Test the Track: Perform a short-distance test on the ground to check that the track moves smoothly.
- Check the Hydraulic System: Inspect the hydraulic system for proper operation, ensuring there are no leaks or pressure issues.
Disconnecting and reinstalling the final drive on a Kubota KX121-3 mini excavator requires careful attention to detail and the proper tools. By following the correct disconnection and installation steps and performing thorough inspections and maintenance, you can ensure that the final drive system operates efficiently and has a longer lifespan. If you encounter difficulties during the process, it’s advisable to seek help from a professional technician.