For anybody interested it turned out to be the foot valve causing the issue thanks for the help lester
Ok i checked the pressures at the brake chamber and they match with the gage in the dash when the brakes are applied. I am putting a foot valve in...
I havent checked application pressure yet how would u recommend doing that? I would assume remove air line off the brake chamber and put a...
Got a 01 peterbilt 387 with steer axle issues. When brakes are applied the truck pulls hard to the left (driver side stopping harder). I have...