Recent content by rjoffrion

Ok I have a truck leaking out there when I push the parking brake button in. also when I step on the brake pedal it exhaust air through the parking brake button assembly. I have cleaned and or replaced all the valves I can find. it is a M1079A1 van body. any help would be great..

it builds and holds pressure till I push the parking brake button. the trailer one works fine..

well im not sure exactly was the original issue.. a few mechanics have worked on it and couldn't fix it so I got it dumped into my lap.. As I can tell and hooking the lines up from the parts manual they are correct. I also looked at another truck in working order for the brake pedal line...

I have an air brake issue maybe you guys can help. I have a M1079A1 that when I push the parking brake button in to release the brakes it vents air out the vent port in the middle of the cab behind the heater unit down to the grill.. I have checked cleaned or replaced all the two way check...