SnaykeByte Posted February 12, 2015 Report Share Posted February 12, 2015 When eliminating all traces of service air fror a trailer, should the control port of the BP-R1 be left open to atmosphere of plugged? "JOE DIRT"--1994 Volvo WIA64TES VED12, 425HP, SUPER 10, SINGLED, 370 REARS, DOMETIC AUXILLARY A/C, ONAN QD10000 GENNY2006 Fleetwood Wilderness Advantage AX6 40ft"I'm not in right now.......I'm out finding myself. If I get back before I return, leave me a message and one of us will get back to you..??" I'm right 97% of the time.........and nobody cares about the other 4% Link to comment Share on other sites More sharing options...
Scrap Posted February 13, 2015 Report Share Posted February 13, 2015 I think the consensus here is that it is supposed to be plumbed direct to an air tank? But to answer the question, yea, it needs a vent hose/sintered metal fitting open to atmosphere. No plug. Link to comment Share on other sites More sharing options...
SnaykeByte Posted February 13, 2015 Author Report Share Posted February 13, 2015 If I understand the system correctly, from the factory the control port is pressurized when you push in the valve to pressurize the trailer and that tells the BP-R1 that a trailer is present and to make the rear brakes 1 to 1 for the extra weight on the drives. The reason I'm asking, when I singled it and eliminated all of the air plumbing for the trailer I think I plugged the control port. The issue I am having is that the rear wheels lock up with moderate brake application on dry road, let alone wet. I'm thinking if it is infact plugged, that would just make it a relay valve instead of a proportioning valve. I'm fairly sure the crack pressure is 4 psi so I may have to change it to a 5 or 6 if I remove the plug and the problem persists. Make sense? "JOE DIRT"--1994 Volvo WIA64TES VED12, 425HP, SUPER 10, SINGLED, 370 REARS, DOMETIC AUXILLARY A/C, ONAN QD10000 GENNY2006 Fleetwood Wilderness Advantage AX6 40ft"I'm not in right now.......I'm out finding myself. If I get back before I return, leave me a message and one of us will get back to you..??" I'm right 97% of the time.........and nobody cares about the other 4% Link to comment Share on other sites More sharing options...
Scrap Posted February 16, 2015 Report Share Posted February 16, 2015 Yep it does. Also make sure that brake application isn't your first one in awhile - ie: it is done with nice, clean, shiny, sorta warm drums. Link to comment Share on other sites More sharing options...
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