TM 10-3930-653-14&P REAR CYLINDER 1. Jack  or lift the  inner  channel with a chain hoist high  enough  to  gain  access  to  the  piston  head (Part  Number  24450-70401).    This  is  the  same procedure   as   #8   of   "Replacement   of   Upright Rollers".   NOTE   :      Inner      channel   will   raise simultaneously. 2. Securely  block middle channel in this   position. Inner      channel   should   then   be   raised   slightly higher and blocked to release the chain tension. 3. Now    unbolt  piston  head  and  lower  it  while  still connected   to   rear   cylinder      rams.      Wire   the chains up out of the way. 4. Remove bolts holding  rams   to piston head and remove  piston head. 5. Remove      hose   guard   from   the   front   to   gain access  to  the high pressure hose between the two rear cylinders. Remove the hose. 6. Secure  cylinders  by  rope  or  chain  and  remove  the bottom set bolts and the U-bolts. 7. Release  the    rope  or    chain  one  cylinder  at  a time  and  lift  the  cylinder  straight  up  and  out  of the upright. 8. Loosen  set screw (Item  2,  Part Number 22298- 40111)  and  remove  cylinder    cap    (Item      22, Part Number 24459-42261). 9. Replace  repair  kit parts  (Part Number  24459- 49801)  by  pulling  the  lift  cylinder  ram  out  of  the cylinder  for  access   to    these  parts.  Take  the piston  (Item  27,  Part  Number  24459-42281)  off the ram by removing the castled nut (Item 32) to gain  access  to  the  "O"-ring    between  the  piston and ram. 10.  Inspect    the    condition    of  the  cylinder  walls  for scratches or grooves. Repair  or replace all parts as necessary. 11.  Reassemble in reverse order. 4-206