On the air system, builds up till air dryer blowers off then not building again till pressure drops to 60 psi then builds again till blow off and repeats process, has new compressor, governor, and dryer
Adjust the governor on air compressor.
If not serviceable, replace it.
If internal governor, replace air compressor.
Skill level... medium
Time to try fix... 15 minutes
Time to replace... 1 hour
Patience level... Low
I've been fighting this thing for a week now, new compressor, and air dryer 3rd governor on it now. Adjusted governor to 120 psi blow off but still compressor doesn't kick in till pressure is at 60 psi
Do you have an air fan clutch? Is the fan clutch leaking air by any chance? My thought is that maybe it’s leaking more air than the compressor can make. And once it gets to 60lbs the fan clutch can’t get air again until the air is built back up again? Kinda a long shot but I’ve seen something similar on a western star.