TM 10-6640-215-13 4-39.  REMOVE/INSTALL COMPONENTS OF WATER SYSTEM. This task covers: a.   Removal c.   Test b.   Installation INITIAL SET-UP: Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 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 1. Remove Water Filter.  See figure 4-29. NOTE Filter element replacement requires only that the bowl be unscrewed from filter cover. a. Set switch on pump controller to OFF. b. Open circuit breaker A15CB8 on Power Panel No.  2. c. Close isolation valves on each side of filter. d. Remove water filter element retaining bolt. e. Remove bowl and remove filter element. 2. Remove Water Pressure Switch.  See figure 4-30. a. Remove switch cover, tag leads for reconnection and disconnect switch leads. b. Remove lock nut from conduit and remove conduit. c. Turn water piping union and unscrew defective pressure switch from piping. d. Remove water pressure switch. 4-93