Posted 1/12/2026 07:30 (#11506601 - in reply to #11506598) Subject: RE: Primary and secondary air guage on peterbilt379
Central Saskatchewan Canada
Ndfarmer26 - 1/12/2026 07:27
Bern - 1/12/2026 07:22
Normal allowable difference between cut out and cut in pressures are about 25 PSI. If it doesn't go below 90 I wouldn't be too concerned. Your shop air compressor acts in a very similar manner I'm sure.
Ok. Just wanted to make sure so I’m not stranded on the side of the road with locked up brakes. Thanks!
I’m not being rude but are you new to using semis?
This is all taught when you take your test for the semi licence.
Primary and secondary air guage on peterbilt379
