If the air compressor takes longer than 3 minutes to build pressure from 50 to 90 PSI, this indicates:
a.Normal operation in cold weather
b.A possible problem with the compressor or system that needs repair
c.The governor needs adjustment
d.The safety valve is working correctly
Explanation
If the air compressor cannot build pressure from 50 to 90 PSI within 3 minutes with the engine running at operating RPM, there is likely a problem. Possible causes include a worn compressor, air leaks, or a defective governor.