1. Overload (not service

     factored properly).

2. Insufficient or excess oil.

3. Incorrect oil.

1. Check loading and service

    factor.

2. Check Oil Capacities.

3. Flush and add recommended

     oil.

1. Gears damaged.

2. Bearings damaged.

3. Inadequate lubrication.

4. Foreign matter in

1. Replace gears.

2. Replace bearings.

3. Add oil

1. Worm gear distorted.

2. Worn worm.

3. Foreign matter in

    reducer.

4. Damaged or worn

    bearings.

1. Replace gear.

2. Replace worm.

3. Flush and change oil.

4. Replace bearings.

1. Oil seal damaged.

2. Gasket damaged.

3. Drain plug loose.

4. Oil gauge damaged.

5. Zerk fitting pointing

1. Replace seal.

2. Replace gasket.

3. Tighten drain plug.

4. Replace gauge.

5. Rotate cover.

1. Worm and worm gear

    overheating.

2. Bearings damaged.

3. Solid foreign matter in

     gearbox.

4. Too much preload on

1. Repair or replace.

2. Replace bearings.

3. Disassemble, clean, refill.

4. Add gaskets.

1. Gears worn.

2. Broken output shaft.

3. Worn input shaft.

1. Replace gears.

2. Replace shaft.

3. Replace shaft.

1. Overloading.

2. Inadequate lubrication.

3. Bearings damaged.

4. High ambient

1. Adjust load or resize unit.

2. Follow recommendations.

3. Replace bearings and gears.

1. Add shims.