TM 10-6640-238-13 5-40 5-19.    PYROMETER INDICATOR/CONTROL. This task consists of: a.   Remove b.   Install INITIAL SET-UP Tools Required General Mechanics Tool Kit, (Appendix B, Section III, Item 1) Materials/Parts Required Lockwashers, (2) General Safety Instructions WARNING ELECTRICAL SHOCK Before performing any  maintenance actions on electrical equipment, ensure  all electrical power has been turned off.  Failure to comply with this warning may result in serious injury or death. REMOVE Remove Pyrometer Indicator/Control.  See Figure 5-15. a. At Main Power Panel, set circuit breaker A1CB18 to OFF. b. Remove four screws (1) securing pyrometer (2) to front panel. c. Remove two screws (3), lockwashers (4), washers (5), bracket (6), and pyrometer (2).  Discard lockwashers. d. Tag and disconnect electrical leads and conduit (7) from pyrometer (2). INSTALL Install Pyrometer Indicator/Control.  See Figure 5-15. a. Connect conduit (7) and electrical leads as tagged to housing assembly.  Remove tags. b. Install pyrometer into front panel and secure with bracket (6), two screws (3), lockwashers (4), and washers (5). c. Secure pyrometer (2) to front panel with four screws (1). d. 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 2-6j. f. Inspect for leaks and check for proper operation.