TM 10-3930-671-24 G.    Clutch Assembly Forward clutch reassembly is the same as reverse clutch (shown). NOTICE    -    Before    reassembly,    clean,    inspect    and lubricate all parts with a light layer of engine oil. 1. Install new clutch piston inner and outer  oil  seal rings in piston grooves.  See figure above. IMPORTANT  -  The  rings  must  be  sized  before  piston installation onto shaft and into the clutch drum: • Sizing is best accomplished by rotating the piston    while        holding    a    round    object against the new seal rings. • Rotate  the  piston  until  the  seal  rings  are sized    flush    with    the    inner    and    outer diameters of the piston. 2.    Install  clutch  piston  over  turbine  (clutch)  shaft and into clutch drum. 3.    Install  clutch  piston  wear  plate  (flange  towards piston). 4.    Install piston return springs (Belleville  washers). Install  first  washer  with  large  diameter  of  bevel toward wear plate.  Alternate five (5) washers. 5.    Position   return   spring   retainer   ring   on   clutch shaft. Start ring on shaft with snapring pliers. 6.    Install   retainer   ring   using   a   sleeve   with   the proper   inner   diameter   to   fit   over   shaft   and against  retainer  ring.    A  sharp  blow  with  a  sott hammer will compress springs and seat retainer ring.    Be  sure  ring  is  seated  fully  in  position  in ring groove. 7.    Install  the  first  outer  (steel)  clutch  disc  against clutch  piston.    Next,  install  first  inner  (friction) clutch  disc.  Alternate  outer  and  inner  discs  to install a total of 6 outer steel plates and 6 inner friction plates. 8.    Install clutch disc end plate. 9.    Install end plate retainer ring. 10.    Check clutch disc clearance.  See note below. NOTE Both  clutch  packs  (Forward  and  Reverse)  must be checked for clutch disc clearance: 1) Stand  the  clutch  assembly  on  end.    The clutch  discs  on  the  bottom  will  fall  to  the end plate. 2) Measure  the  distance  between  the  clutch piston and the first steel disc by inserting a feeler gauge through the slots in the clutch drum. 3) Required     clearance     is     .048-.105     in. (1.222.66 mm) 4) If clearance is greater than .105 in.  (2.66 mm),  add  one  steel  disc  under  the  end plate. 11.    Install inner clutch gear thrust bearing set (thrust bearing between 2 thrust washers). 12.    Assemble  clutch  gear  bearing  (spacer  between bearings) into clutch gear hub. 13.    Install    clutch    gear    into    clutch    assembly    by aligning the clutch hub teeth with the clutch inner discs.  Be sure the clutch hub is fully in position in   the   clutch   assembly.      Do   not   force   this operation. 14.    Install  outer  clutch  gear  thrust  bearing  set,  with thrust  bearing  between  thrust  washers,  against clutch gear. 15.    Repeat  assembly  procedures,  Steps  1  through 14, for forward clutch. 16.    After forward clutch is assembled, install new oil distributor   seal   rings   on   clutch   shaft.      Apply grease   to   rings   to   facilitate   assembly   into   oil distributor. F-373