7,8,9 and 10-Speed Range Air Systems

Air is supplied to the system at the air supply port (1) by the vehicle's air system. The air filter (2) removes foreign matter from the air then allows it to pass through the air regulator (3) where the pressure is adjusted for 58 to 63 PSI (4.0 daN/cm2). From there the air passes through the supply air hose (4) and the slave valve supply port (5) through the supply air line (6) to the range control valve (7). With the range control valve lever or knob down (LO range), air passes through the air line connected to the slave valve "P" port (8). The slave valve then directs air to the LO range hose (9) and exhausts the HI range hose (10). With the range control valve lever or knob up (HI range,) the air line connected to the slave valve "P" port (8) is exhausted. The slave valve then directs air to the HI range hose (10) and exhausts the LO range hose (9).