BENDIX BW2271 Manual do Utilizador Página 1

1Bendix® SR-7® Spring Brake Modulating ValveSD-03-9043DESCRIPTIONThe Bendix® SR-7® spring brake modulating valve is used in conjunction with a dual ai

2OPERATIONThe operation guidelines shown in this manual represent the relay valve based Bendix® SR-7® (refer to system schematic shown in fi gure 3).

3PP-DC®VALVESYSTEM FOR A 4X2 OR 6X4STRAIGHT TRUCK WITHPP-DC PARKING CONTROL®FIGURE 3 - SYSTEM SCHEMATIC WITH PP-DC® PARK CONTROLFIGURE 4 - SYSTEM SCHE

4CHARGING SPRING BRAKE ACTUATORS BELOW 107 PSI (FIGURE 5)With the air brake system charged and the parking brakes released (by pushing the dash valve

5NORMAL SERVICE APPLICATION (FIGURE 7)During a service brake application, the valve remains in the lap position. The Bendix® SR-7® valve monitors the

6SERVICE APPLICATION WITH LOSS OF AIR IN PRIMARY CIRCUIT (FIGURE 9)With the parking brakes released (dash valve button in) and the absence of air in t

7ANTI COMPOUNDING (FIGURE 11)The Bendix® SR-7® valve provides anti-compounding of the service and spring brake forces. When the park brakes are actua

8LEAKAGE TESTPlace the park control valve in the “release” position; using a soap solution, coat all ports including the exhaust port. A 1" bubb