Help Center

Gearbox - Troubleshooting Guide

D

Daniel Zhang

Last updated on Jul 14, 2026

  1. Noise
Symptom Possible Cause Corrective Action
Gear rattle or clatter Gear damaged Replace damaged gear set
Continuous noise Bearing damaged or gear oil contaminated Replace damaged bearings or change gear oil
Intermittent noise Foreign matter on gear Inspect gear surface and remove debris
Whining or high-pitched squeal Insufficient gear oil Add gear oil to the specified level
  1. Vibration
Symptom Possible Cause Corrective Action
Abnormal vibration at mounting base Mounting surface is not level Readjust and level the mounting base
Output shaft vibration Bearing damaged Replace damaged bearings
Internal gear vibration Gear damaged Replace damaged gear
Body vibration Gear set misalignment or improper installation Realign and properly install the gear set
  1. Oil Leakage
Symptom Possible Cause Corrective Action
Oil seal leakage Oil seal damaged Replace oil seal
Housing oil leakage Casting porosity in the housing Replace housing
Oil leakage between gearbox and motor O-ring seal damaged Replace O-ring seal
  1. Overheating
Symptom Possible Cause Corrective Action
Overheating at oil seal Oil seal is too tight (excessive friction) Replace oil seal with correct specification
Overheated housing Overload operation Verify load against gearbox rated torque; reduce load if necessary
Overheated housing Insufficient gear oil Add gear oil to the specified level