TM  10-3930-638-24&P 2-31.   SENDING   UNITS   AND   SWITCHES   MAINTENANCE   (cont) e. Stop Light and Hydraulic Fiber Switches. This  task  covers:  a.  Removal c. Inspection b.  Cleaning d.  Installation INITIAL  SETUP TOOLS EQUIPMENT CONDITION No.  1  Common  Organiza- NSN   4910-00-754-0654 Paragraph Condition Description tional Maintenance Tool Kit Engine off. MATERIALS/PARTS Cleaning  solvent  P-D-680 Clean  cloths Silicone  rubber  sealer IGNITION switch in OFF position and key  removed. 2-53c Left  side  panel  removed  (hydraulic  filter switch). 2-53i Chassis  guard  removed. 2-170