Posted 1/28/2018 21:11 (#6538713 - in reply to #6538646) Subject: RE: Peterbilt brake issue
West central Minnesota
What is the brake stroke at the slack ? should be under 2". if that is fine I would guess the bobtail proportioning valve is bad. mounted on crossmember right in front of fifth wheel plate. does it have auto slacks or manual ? Bendix bp-r1