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proportioning valve


SnaykeByte

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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?

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