TM 10-3930-664-24 6. INSTALL DRIVE BELT (2). a. Using  3/8"  square  drive  handle,  lift  up  on  belt tensioner arm (1). b. Carefully install drive belt (2) onto alternator. c. Release belt tensioner arm (1). d. It may be necessary to reposition alternator after belt   installation   to   ensure   correct   belt   tension. Reposition alternator by loosening link screw and lifting or lowering alternator. FOLLOW-ON MAINTENANCE: Test belt deflection (para.  2-54) Service radiator (para.  2-46) Install fan guard (para.  2-53) END OF TASK 2-157