TM 10-3930-664-24 C.  INSPECTION 1. Inspect    belt    for    frays    (see    A).        Inspect    for missing material (B). 2. Inspect  for  cracks.    Cracks  running  across  belt (C) are acceptable.  Cracks  running  direction  of belt (D) are cause for belt replacement. D.  INSTALLATION 1. Using  a  3/8  inch  square  drive  handle,  lift  up  on belt tensioner arm (1). 2. Carefully install drive belt (2). 3. If    belt    installation    is    difficult    (belt    too    tight), position belt over grooved pulleys first, then over water pump pulley. 4. Release belt tensioner arm (1). FOLLOW-ON MAINTENANCE: Install fan guard (para.  2-53) END OF TASK 2-166