TM 10-6640-215-13 15-6.  REMOVE/INSTALL WATER TANK. This task consists of: a. Removal b.  Installation INITIAL SET-UP: Tools required General Mechanics Tool Kit, (Appendix B, Section III, Item 2) Material required Teflon Tape, (Appendix E, Section II, Item 157) Flange gasket, (Appendix E, Section II, Item 158) Personnel Required Two (2) General Safety Instructions WARNING ELECTRICAL SHOCK Before  performing  any  maintenance  actions  on  electrical  equipment,  ensure  all  electrical  power has been turned off.  Death or serious injury may occur from failure to do this. REMOVAL Remove Water tank.  See figure 5-2. a. Set switch on WATER PUMP controller to OFF. b. Set A15CB8 at POWER PANEL No.  2 to OFF. c. Open drain valve at bottom of water tank.  Allow water to drain from tank and system plumbing. d. Disconnect seven unions from water tank connections on top of tank. e. Disconnect union on suction line from water pump line. f. Disconnect drain line union. g. Remove six bolts, nuts, flat washers, and lockwashers, from tee flange.  Remove gasket. h. Remove two bolts and flat washers from each tank support leg. i. Disconnect unions and remove any obstructing plumbing as required. j. Remove water tank. k. Remove pipe fittings from water tank. 5-4