In real hydraulic system operation, gear tooth wear is one of the most common causes of reduced pump efficiency, increased noise, and pressure instability.
Proper evaluation and repair are critical to restoring pump performance.
1. Minor Surface Wear (Light Polishing Wear)
Condition: Smooth surface / No deep grooves / Wear within allowable tolerance
Repair Method:
✔ Fine polishing with precision lapping
✔ Maintain original gear profile
✔ Strictly control dimensional tolerance
⚠ Never remove excessive material.
Excessive polishing increases internal leakage.
2. Surface Scratches or Light Scoring
Condition: Shallow grooves / No tooth deformation
Repair Method:
✔ Micro-polishing using fine abrasive tools
✔ Remove burrs carefully
✔ Re-measure backlash and clearance
If radial or axial clearance exceeds standard → Replace gear set.
3. Pitting or Fatigue Damage
Condition: Surface peeling / Material flaking / Visible fatigue cracks
Repair Principle:
❌ Do NOT attempt repair
✔ Replace the entire gear pair
Reason: Fatigue damage spreads internally and cannot be restored safely.
4. Severe Abrasion or Tooth Profile Deformation
Condition: Tooth thinning / Irregular profile / Pressure instability
Solution:
✔ Replace matched gear set
✔ Inspect pump housing and bearings
✔ Check oil cleanliness level
Severe wear often indicates contamination problems.