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Old 08-13-2012, 05:59 PM
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Do you have residual check valves in place. 2#'s front. 10#'s rear.
Could be draining back to the master. You do need a prop valve to limit pressure to the back.
Front does 80% of the braking. You could get away with the residual check valves and an adjustable valve to the rear and then not use a prop valve.
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