TM 10--3510--221--24 0006 00--2 AIR SYSTEM THEORY OF OPERATION -- Continued 0006 00 PRODUCT AIR DISTRIBUTION -- Continued A filter is mounted at the manifold inlet to prevent particles from plugging the orifices. An inlet orifice is provided to isolate the individual level sensor orifices from pressure and flow surges. Eight level sensor orifices are used to supply a steady flow of low pressure air to the pressure sensor and bubbler tube used to determine the water levels in the wash tanks, rinse tanks, still, and stand pipe. The air provided to the drum air bags passes through a regulator that is set to deliver air at 65 psig. The regulator is adjustable and contains a pressure gauge (PI501) that indicates the regulated pressure. Each front air bag has a leveling valve that is mechanically connected to the drum. When the LADS is operating on unlevel terrain the leveling valve adds or vents pressure from the air bag until the drum is level in the side--to--side direction. AIR INLET COALESCING FILTER DEHYDRATOR AIR FILTER M500 AIR TANK VENT PT 500 TO LEVEL SENSORS FILTER AIR COMPRESSOR WATER PRESSURE SENSOR HAND VALVE RELIEF VALVE PRESSURE INDICATOR PRESSURE REGULATOR (PR501) CHECK VALVE RELIEF VALVE PI 500 PT 501 PRESSURE SENSOR TO DRUM REAR AIR BAGS ORIFICES (BANK OF 8) TO AIR ACTUATORS HAND VALVE VENT PRESSURE INDICATOR PI 501 VENT TO DRUM FRONT AIR BAGS LEVELING VALVE (TYPICAL 1 OF 4) ORIFICE SOLENOID MANIFOLD (TYPICAL 1 OF4) HAND VALVE PRESSURE REGULATOR (PR500) VENT HAND VALVE HAND VALVE DRAIN HAND VALVE