TM 10-6640-215-13 5-22.  REMOVE/INSTALL HIGH PRESSURE STEAM BOILER. This task consists of: a.  Removal b.  Installation INITIAL SET-UP: Tools required General Mechanics Tool Kit, (Appendix B, Section 11, Item 2) Material Required Teflon Tape, (Appendix E, Section II, Item 157) 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 High Pressure Steam Boiler.  See Figure 5-21. a. At MAIN POWER PANEL, set circuit breaker A1CB19 to OFF. WARNING To  prevent  injury  to  personnel,  be  sure  high  pressure  steam  boiler  has  had  time  to  cool  before performing  any  maintenance.    Steam  temperature  as  high  as  600°F  (279.9°C)  can  be  obtained  in this unit. b. Remove  cover  from  steam  temperature  control  box.    Tag  for  reconnection  and  disconnect  wiring  and  conduit from control box. c. Disconnect unions at each end of pipe from valve No.  2 to boiler.  Remove pipe. d. Disconnect boiler steam outlet and relief lines at unions near top of boiler. e. Disconnect inlet union at bottom of boiler. f. Remove two self-tapping metal screws from boiler. g. Lift and remove boiler from mount. h. Unscrew and remove temperature sensing bulb from bulb well. i. Remove two screws and wire guard. 5-42