TM  10-3930-638-24&P 2-31. SENDING UNITS AND SWITCHES MAINTENANCE a. Fuel Gage Sending Unit. This  task  covers:  a.  Removal b.  Cleaning INITIAL  SETUP TOOLS No. 1 Common Organiza- NSN tional  Maintenance  Tool  Kit MATERIALS PARTS Cleaning  solvent  P-D-680 Clean  cloths Gaskets c.   Inspection d.  Installation EQUIPMENT  CONDITION 4910-00-754-0654 Paragraph Condition  Description Engine  off. IGNITION switch in OFF position and key  removed. 2-53c Left  side  panel  removed. 2-157