Repairing the differential gear on a Komatsu PC400-6 excavator involves several steps, and it’s crucial to follow proper procedures for safety and functionality. Discover the manual and additional info—click here…..
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Here’s a reverse order guide to help you understand the process:
### 9. Reassembly
– **Reinstall the Differential Housing**: Carefully place the differential housing back onto the axle assembly, ensuring all seals and gaskets are properly positioned.
– **Secure the Bolts**: Tighten all bolts to the manufacturer’s specified torque settings to ensure a secure fit.
– **Reattach the Axles**: Connect the axle shafts to the differential, ensuring they are properly aligned and secured.
### 8. Final Checks
– **Inspect for Leaks**: Before lowering the equipment, check for any signs of leaks around the differential and axle seals.
– **Test the Movement**: Rotate the wheels manually to ensure that the differential is functioning correctly and that there is no binding.
### 7. Fluid Refill
– **Refill Differential Oil**: Use the recommended differential oil to refill the housing through the fill plug.
– **Check Fluid Levels**: Ensure that the fluid level is at the appropriate height as specified in the service manual.
### 6. Install the Differential Cover
– **Position the Cover**: Place the differential cover back onto the assembly.
– **Secure with Bolts**: Fasten the cover with the appropriate bolts, ensuring a tight seal to prevent any oil leaks.
### 5. Gear and Bearing Installation
– **Install New Bearings**: Place new bearings on the differential assembly, ensuring they are seated correctly.
– **Install the Gears**: Position the crown gear and pinion gear into the differential housing, ensuring that they are aligned correctly.
### 4. Remove the old Differential
– **Disassemble the Differential**: Remove the old differential assembly from the axle housing. This may involve removing bolts and using a puller if necessary.
– **Inspect Components**: Check all components, including gears and bearings, for wear and damage.
### 3. Drain the Differential Fluid
– **Drain Oil**: Place a suitable container underneath the differential housing and remove the drain plug to let the old oil drain completely.
### 2. Preparation
– **Gather Tools**: Ensure you have all necessary tools, including wrenches, sockets, a torque wrench, sealant, and any specialized tools required for the job.
– **Safety Precautions**: Wear appropriate safety gear, including gloves
and eye protection, and ensure the excavator is on a level surface and properly supported.
### 1. Access the Differential
– **Remove the Axles**: Detach the axles from the differential housing to gain access to the differential assembly.
– **Dismantle Components**: Depending on your access, you may need to remove other components like the wheels or brakes.
### Important Notes:
– Always refer to the specific Komatsu PC400-6 service manual for detailed instructions, torque specifications, and safety guidelines.
– If you are not experienced in heavy machinery repair, it may be wise to consult with or hire a professional mechanic.
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