STRUCTURE AND FUNCTION BRAKE PEDAL BRAKE PEDAL INCORPORATING BRAKE VALVE F = Accumulator pressure switch R = Accumulator (parking brake) R 1 = Accumulator (service brake) r 2 = Accumulator (service brake) T 1 = Service brake T 1 1 = Service brake pressure switch T 2 = Service brake T 2 1 = Stop light pressure switch X = Parking brake X 1 = Parking brake pressure switch P = Delivery B = Return N = Tank Specifications Accumulator charge pressure (cut in) = 122 bar (cut out) = 150 bar +6 -2 +8 -4 10-26