Slewing Bearing Seal Replacement Guide

Applicable Machines: Excavators and similar hydraulic machinery

1. Tools and Materials Required

• High-quality replacement slewing bearing seal (cut to OEM-specified length)

• Flathead screwdriver

• 502 adhesive (cyanoacrylate glue)

• Cleaning rags or solvent

2. Step-by-Step Replacement Procedure

1. Clean the Seal Groove

   • Remove all oil, grease, and debris to ensure proper seating of the new seal.

2. Prepare the Replacement Seal

   • Cut the seal to the OEM-specified length.

   • Have a tube of 502 adhesive ready for the joint.

3. Install the Seal

   • Using a flathead screwdriver, gently stretch the seal to fit the groove.

   • Ensure it sits evenly along the entire circumference.

4. Seal Joint Preparation

   • Cut the ends of the seal at a mitered angle.

   • Apply 502 adhesive to the joint.

   • After curing, place the joint into the groove.

   • (Tip: Simple, like “fitting an elephant into a fridge” — just a bit of humor to illustrate simplicity.)

3. Important Notes

• Grease leakage is not caused by seal failure.

  • The seal primarily prevents dust and dirt ingress, not grease outflow.

  • It is a single-direction seal with limited sealing force.

4. Common Causes of Grease Leakage

5. Recommended Practices

• Inspect the bearing for excessive wear before installing the seal.

• Only use high-quality seals meeting OEM specifications.

• Ensure proper adhesive curing at the seal joint to maintain integrity.

• Avoid over-lubrication during maintenance to prevent premature leakage.