- 1. Air Compressor Fails To Maintain Sufficient Pressure Or Adequate Air.
- 2. Noisy Operation.
- 3. Air Compressor Passes Excessive Oil.
- 4. Air Compressor Not Unloading (excessive pressure).
Troubleshooting Problems
Problem 1: Air Compressor Fails To Maintain Sufficient Pressure Or Adequate Air
Possible Causes:
- 1. Dirty Inlet Cleaner.
- 2. Restriction In Air Compressor Cylinder Head Inlet, Discharge Cavities Or Line.
- 3. Leaking Or Broken Inlet Or Exhaust Valves.
- 4. Excessive Wear.
- 5. Drive Belt Slipping.
- 6. Excessive System Leakage Or Usage.
- 7. Defective Governor.
- 8. Worn Unloader Seals.
- 9. Governor Setting Incorrect.
- 10. Gauge Defective.
Problem 2: Noisy Operation
Possible Causes:
- 1. Loose Drive Pulley.
- 2. Restriction In Cylinder Head Or Discharge Line.
- 3. Worn Or Burned Out Bearings.
- 4. Air Compressor Not Receiving Proper Lubrication.
- 5. Excessive Wear.
Problem 3: Air Compressor Passes Excessive Oil
Possible Causes:
- 1. Excessive Wear.
- 2. Dirty Air Cleaner (improper air cleaner maintenance).
- 3. High Inlet Vacuum.
- 4. Small Or Restricted Oil Return Line Flooding Air Compressor.
- 5. Piston Rings Not Properly Installed.
- 6. Back Pressure From Engine Crankcase.
- 7. Inlet Pipe Restricted – Too Small Or Too Long.
- 8. Excessive Oil Pressure.
Problem 4: Air Compressor Not Unloading (excessive pressure)
Possible Causes:
- 1. Defective Unloader Pins Or Seals.
- 2. Defective Governor.
- 3. Reservoir Line To Governor Restricted.
- 4. Unloader Mechanism Binding Or Stuck.
- 5. Gauge Defective.