TM   10-3930-643-20 ELECTRICAL  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE.  (cont) 5-39. Engine  Water  Temperature  Switch.  (Sheet  1  of  4) This   task   covers: a. Removal b. Cleaning/Inspection c .    I n s t a l l a t i on INITIAL  SETUP Tools Materials/Parts Shop   Equipment,   Automotive Cleaning   solvent Maintenance   and   Repair: (App.  C,  Item P-D-680 2) Organizational    Maintenance, Clean   cloth   (App.   C,   Item   10) Common  No.  1,  Less  Power Small  tag  (App.  C,  Item  12) NSN   4910-00-754-0654 Silicone   sealant   (App.   C,   Item   11) Tool   Kit,   General   Mechanic’s Automotive Torques NSN   5180-00-177-7033 Except  for  special  torques  shown, all   fasteners   are   tightened   to   a standard  torque. Refer   to Appendix  E. EQUIPMENT  CONDITION References Condition   Description Paragraph   4-27 Coolant    drained. Paragraph   5-47 Battery   negative   disconnected. Go  to  sheet  2 5-194