TM 9-2320-363-20-1
RELIEVING AIR PRESSURE
There are two separate air systems, the primary and the secondary, and it is necessary to relieve pressure from both.
ALL EXCEPT M915A2
PRIMARY: OPEN MANUAL DRAIN VALVE (1) ON EITHER OF TWO PRIMARY AIR TANKS.
SECONDARY: PULL CABLE ATTACHED TO REMOTE DRAIN VALVE (2) ON AIR SUPPLY TANK, OR OPEN MANUAL
DRAIN VALVE (3) ON SECONDARY AIR TANK.
REFER TO TM 5-3805-264-14&P FOR PROCEDURES TO DRAIN THE MCS AIR SYSTEM ON THE M917A1 W/MCS.
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