Troubleshooting Guide: Fix Common Bearing Failures in 4 Hours

When an excavator bearing fails, every hour of downtime costs $1,000+ for overseas operators. Waiting for OEM service teams can take days—but many issues can be fixed on-site with the right know-how. Dongye Yulin Bearings shares a step-by-step guide to diagnose and repair 90% of common failures, based on data from 500+ global service calls.

Symptom: Sharp, continuous noise during operation.
Cause: Overloading or poor installation alignment.
Fix:

• 2. Overheating (Temp >90℃): Check Lubrication & Clearance
  • Drain excess grease (should fill only 30% of bearing space).
  • Verify clearance: 0.03-0.05mm for 20t excavators (Dongye pre-sets clearance at factory).
  • Tip: Add a thermal probe—Dongye’s bearings work with Cat’s VisionLink system for real-time temp monitoring.

  Symptom: Reddish deposits; rough rotation.
  Cause: Seal damage from pressure washing or debris.
  Fix:

   

  • 4. Electrical Pitting: Hidden but Destructive
    Symptom: Small craters on raceways (visible under magnification).
    Cause: Current leakage from faulty motors.