michael c Posted July 12, 2016 Share Posted July 12, 2016 I have a 1995 RB tri axle i lost air pressure to my parking brake valve. I cant tell where the supply line comes from if there is a stuck valve somewhere else or an obstruction? Also lost air to the transmission range conrtols at the same time. Parking brake valve has three lines one should be pressure and i belive its the 3/8 line. I took the air line off that supplies the service side of the air gague and moved what i think is the pressure side of the parking brake valve. Then put the origional line off the valve in the spot for the pressure switch on the valve to get me home. Anyone had this problem or know where to start looking? Thanks Mike Quote Link to comment Share on other sites More sharing options...
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