TM 10-6640-215-13 4-36.  REMOVE/REPLACE COMPONENTS OF AIR SYSTEM - continued. REMOVAL 1. Remove Air Compressor.  See figure 4-23. a. Set switch on compressor controller to OFF. b. Open circuit breaker A 15CB8 on Power Panel No.  2. c. Remove two screws and cover from adjacent junction box for reconnection and disconnect motor leads. d. Disconnect discharge hose from the fitting at compressor discharge. e. Disconnect drain tubing at tee fitting at compressor discharge. f. Remove capscrews, lockwashers, and flat washers that secure compressor foundation to floor of machinery room.  Remove compressor from its attached foundation. NOTE Before removing air system components purge by opening any system valve. 2. Remove Air Tank.  See figure 4-24. a. Set switch on compressor controller to OFF and open circuit breaker A15CB8 on Power Panel No.  2. b. Tag for reconnection and disconnect pressure switch at top of air tank. c. Remove conduit nut from inside of pressure switch and remove conduit and leads from switch. d. Disconnect air hose on side of air tank (from discharge side of air compressor). e. Disconnect air outlet hose at top of air tank. f. Disconnect drain line at bottom of air tank. g. Remove capscrews, lockwashers, and flat washers that secure air tank to foundation. h. Remove air tank from foundation. i. Remove air gauge, air outlet valve, pressure switch and drain valve, tubing and fitting from air tank. 4-81