Cause / 302

1. Insufficient air pressure. 2. Compressor tank too small. 3. Compressor tank full of water. 4. Restriction or pipe line to small. 5. Oil too heavy in viscosity. 6. Air valve not working properly. (Plugged screen or worn rocker) 7. Load greater than lift capacity. 8. Air supply line from compressor to lift too small.

Repair / 302

1. Check air compressor. 2. Check specifications. 3. Drain tank. 4. Check pipe and size. 5. Check and/or change oil. 6. Check intake side of valve, then exhaust. 7. Weigh vehicle, check specifications. 8. Replace piping with correct size.