TM 10-3930-664-24 6. INSTALL RPM SENDER (4) ONTO MECHANICAL   TACHOMETER   DRIVE   (5)   ON ENGINE.  CONNECT ELECTRICAL WIRING (3) TO RPM SENDER. 8. CLOSE    HOOD    ASSEMBLY    (2).        ENSURE HANDLE (1) IS FULLY ENGAGED. FOLLOW-ON MAINTENANCE: Connect battery cables (para.  2-78) Raise towbar and lock in position (para.  2-126) END OF TASK 2-189