TM   10-3930-643-20 ELECTRICAL  SYSTEM  TROUBLESHOOTING  AND  MAINTENANCE. 5-43. Fuel   Level   Sending   Unit.   (Sheet   1   of   4) This   task   covers: a.   Removal b . Cleaning/Inspection c . Testing d . I n s t a l l a t i on INITIAL  SETUP Tools Shop   Equipment,   Automotive Maintenance   and   Repair: Organizational    Maintenance, Common  No.  2,  Less  Power NSN  4910-00-754-0650 Tool   Kit,   General   Mechanic’s Automotive NSN   5180-00-177-7033 Materials/Parts Cleaning   solvent   P-D-680 (App.   C,   Item   2) Clean   cloth   (App.   C,   Item   10) Detergent   (App.   C,   Item   16) Small   tag   (App.   C,   Item   12) Silicone   sealant   (App.   C,   Item   11) Gasket Torques Except   for   special   torques   shown, all   fasteners   are   tightened   to   a standard   torque. Refer   to Appendix  E. EQUIPMENT  CONDITION References Paragraph   5-47 Condition    Description Battery   negative   disconnected. Go  to  sheet  2 5-211