TM  10-3930-638-24&P 2-31. SENDING UNITS AND SWITCHES MAINTENANCE (cont) b. Neutral Start and Back-up Alarm Switches. This  task  covers:  a.  Removal b.  Cleaning INITIAL  SETUP TOOLS No.  1  Common  Organiza- NSN  4910-00-754-0654 tional Maintenance Tool Kit MATERIALS/PARTS Cleaning  solvent  P-D-680 Clean  cloths Silicone  rubber  sealer c.   Inspection d.  Installation EQUIPMENT CONDITION Paragraph Condition Description Engine  off. IGNITION switch in OFF position and key  removed. 2-53c Left  side  panel  removed. 2-160