Gearbox
Oil leaks

1. Oil seal is defective

2. Cover mounting bolts are loose

3. Air does not escape

4. Input and output shafts are marred

5. Excessive oil

6. Gear case has cavities

7. Gear case has fissures

8. Other than normal installation directions

(horizontal oblique, upside-down etc)

7R DMPS Gel

Gear
Teeth Wearing

1. Overload

2. Contaminated oil

3. Insufficient oil

4. Oil viscosity is too low

5. Ambient temperature is too high

6. Foreign particles are mixed in oil

7. Excessive rpm

8. Backlash is improper