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Gear reducer oil leaks affect more than appearance—they reduce lubrication and create environmental risk. This article covers common causes and practical fixes.
1. Worn or Hardened Shaft Seals
Shaft-end oil seals age over time, harden, and lose elasticity. Oil then seeps between the shaft and seal lip. Fix: Replace with the same seal model and install with correct orientation.
2. Blocked Breather Plug
As the housing heats during operation, internal air expands and pressure rises. A blocked breather forces oil out through weaker seal points. Fix: Clean or replace the breather plug.
3. Overfilled Oil Level
Too much oil raises the level above specification. Agitation during operation generates heat and forces oil out at mating surfaces. Fix: Drain to the specified level.
4. Failed Housing Joint Seals
Sealant at housing split lines ages, or flange bolts loosen, allowing oil to weep at joints. Fix: Disassemble, clean mating faces, reapply sealant, and tighten bolts in a cross pattern.
5. Prevention
Check oil level regularly, keep breathers clear, and replace hardened seals promptly—do not wait until leakage becomes severe.
Dezhou Xinmi Machinery supplies custom worm gear reducer parts and replacement components.
