TM  10-3930-638-24&P 2-31.  SENDING  UNITS  AND  SWITCHES  MAINTENANCE  (cont) d. Engine Oil Pressure Switch and Sending Unit. This  task  covers:  a.  Removal d.  Installation/Replacement b.  Cleaning e.  Testing c.  Inspection INITIAL  SETUP TOOLS EQUIPMENT CONDITION No. 1 Common Organiza- NSN  4910-(0754-0654 tional Maintenance Tool Kit Paragraph Condition Description Engine  off. MATERIALS/PARTS IGNITION switch in OFF position and Cleaning  solvent  P-D-680 key  removed. Clean cloths 2-53c Right  side  panel  removed. Silicone rubber sealer KEY 1.  Harness  connector 2. Nut 3. Lock washer 4. Wire lead 5. Oil pressure sender 6. Oil pressure switch 7. Tee 8. Fitting 9. In-line retainer 10.  Resistor Change  2  2-167