TM 10-6640-215-13 5-23.  REMOVE/INSTALL PYROMETER INDICATOR/CONTROL. 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 Lockwashers, (Appendix F) 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 Pyrometer Indicator/Control.  See Figure 5-23. a.   At MAIN POWER PANEL, set circuit breaker A1CB18 to OFF. b.   Open latch and pull out pyrometer from panel mounting.  Disconnect electrical plug and remove pyrometer. c.   Remove housing assembly by removing four bolts, flat washers and lockwashers. Remove housing assembly with brackets attached. d.   Remove eight screws and flat washers securing two brackets to housing assembly. e.   Tag for reconnection and disconnect electrical leads and conduit from housing assembly. INSTALLATION Install Pyrometer Indicator/Control.  See Figure 5-23. a.   Connect conduit and electrical leads to housing assembly.  Remove tags. b.   Install two brackets on housing assembly with eight screws and flat washers. c.   Position housing assembly, with brackets attached, in cabinet.  Secure brackets with four flat washers, lockwashers, and bolts. d.   Connect electrical plug and slide pyrometer into panel mounting.  Close latch. a.   At MAIN POWER PANEL, set circuit breaker A1CB18 to ON. e.   Prepare and operate water system using internal water tank as source in accordance with procedures listed in paragraph 2-8. f. Check for proper operation. 5-46