Replacing an excavator slewing bearing is a job that requires expertise and precision. Below are specific steps to help you complete the replacement successfully:
- Preparation
Tools and equipment: Prepare spanners, jacks, lifting equipment, lubricants and other necessary tools.
Safety measures: Ensure that the excavator is parked on a smooth surface, disconnect the power supply, and set up safety signs in the construction area.
Parts inspection: Make sure the new slewing bearing model and size match the original equipment.
- Disassemble the old slewing bearing
Dismantle attachments: Remove the excavator working devices (e.g. moving arm, bucket bar, bucket) to reduce weight.
Separate the upper body: Use lifting equipment to separate the upper body of the excavator from the lower body and secure it.
Remove fixing bolts: Loosen and remove the bolts fixing the slewing bearings one by one, taking care to record the position of each bolt.
Remove the old slewing bearing: carefully remove the old slewing bearing from the excavator.
- Install the new slewing bearing
Clean the mounting surfaces: Clean the mounting surfaces on the upper and lower bodies to ensure they are free of dirt and contaminants.
Apply lubricant: Apply lubricant evenly to the gears and contact surfaces of the new slewing ring.
Positioning the slewing ring: Use lifting equipment to place the new slewing ring exactly in the mounting position.
Tighten the bolts: Tighten the fixing bolts one by one according to the specified sequence and torque values, ensuring even tightening.
- Restore the equipment
Reinstall the upper body: Lift the upper body back to its original position and check that the connections are secure.
Installation of attachments: Restore the working devices of the excavator and check their operating condition.
- Testing and commissioning
Check operation: start the excavator, test whether the slewing function is normal, and confirm whether there is any strange noise or loose phenomenon.
Adjust the lubrication: replenish the lubricant as needed and make sure the gears and bearings are fully lubricated.
Precautions
During the whole operation, make sure the workers wear safety equipment and follow the operation regulations. If you encounter complicated situations, it is recommended to seek the help of professional technicians.
Through the above steps, the replacement of excavator slewing bearing can be effectively completed to ensure stable operation of the equipment and extend its service life.
