TM 10-3930-653-14&P LIFT CYLINDER REPLACEMENT/REPAIR FRONT CYLINDER 1. Follow    steps    1    through    6      in  "Replacement  of Upright Rollers", to remove carriage. 2. Hold  control  valve  lever  (for lift and lower) forward to  make  sure  all  the  hydraulic  oil  is  out  of  the  lift cylinders. 3. Take    off  high  pressure    hose    at  the  connecting elbow (Part Number 78260-69234). 4. Remove  set  bolt (Item 29)  from bottom of cylinder support. 5. Secure  cylinder    with  rope      or  chain  in  its  original position.    Remove  "U"-bolt  (Item  25)  being  careful not    to    loosen      shims.    Release  rope  or  chain  as you remove cylinder. 6. Loosen   set   screw   (Item   12,   Part   Number   22298- 40111) and  then  unscrew  cylinder  cap  (Item  9,  Part Number 24450-82221) with a spanner wrench. 7. The  packing  kit  (Part  Number  24450-89801)  pieces in   the   cap   can   now   be   replaced   as   necessary. Examine  the  bushing  for  scoring  or  wear  and  press out    and    replace    (Part    Number    23910-22111)    if necessary. 8. There  is  a  wearing  (Item  17,  Part  Number  23918- 52131) around the machined piston area of the ram. Pull    the    ram    out    to    examine    and    replace    as necessary. 9. While  the  ram  is  out  of  the  cylinder,  examine  the cylinder  walls  for  any  scratches  or  grooves.    Repair or replace as necessary. 10.  Reassemble in reverse order. 4-207