How to Troubleshoot an Air Impact Wrench
- 1). Clear the air hose from the compressor by blowing air through it for a few seconds before attaching the air impact wrench if performance is poor. Dust and moisture in the hose will prevent the air wrench from working properly.
- 2). Adjust the air compressor regulator to the correct pressure if the tool isn't performing well. The correct pressure, which will be labeled on the tool or on the shipping materials, is often 90 pounds per square inch. Poor pressure from the compressor will manifest itself as low performance. Pressure above the rated PSI may ultimately cause premature failure of the impact wrench.
- 3). Ensure you're using the correct length and diameter hose if performance continues to be poor.
- 4). Add an inline filter between the wrench and the compressor if you continue to have problems. Debris may be getting into the wrench and causing degradation. Disattach the hose, add the filter and re-attach the hose. Try the job again.
Source...