TM 10-3930-664-24 6. Inspect connecting rod for damage or excessive wear.    I-beam  section  must  be  free  of  dents  or other  damage.    Damage  to  I-beam  can  cause stress risers which will progress to breakage. 7. Measure connecting rod pin bore (dimension D). Maximum diameter shall be 1.5769 in.(40. mm). D. INSTALLATION 1. Insert connecting rod (9) into piston (10). Ensure FRONT    marking    on    piston    and    identification numbers   on   connecting   rod   are   oriented    as shown in figure. 2. Install   retaining   ring   (11)   into   pin   groove   on FRONT side of piston (10). 3. Lubricate pin (12) and pin bore with oil. Insert pin into    piston    (10)    and    secure    using    second retaining ring (11). 4. Determine   diameter   of   piston   (1)   and   obtain proper ring set (13). 5. Position    each    ring    of    set    (13)    into    cylinder. Distance from top of cylinder head to bottom ring shall be 3.5 in.  (89 mm).  Use piston to square rings with bore. 6. Using a feeler gage, measure gap.  Gap shall be 0.0100 to 0.0215 in.  (0.25 to 0.55 mm) for each ring. 4-24