TM 10-3930-669-34 CAUTION Transfer   tube   is   mounted   along   axis   of   cylinder.      Use   blocks   to   protect   transfer   tube   when clamping cylinder in a chain vise or damage to equipment may result. (5) Position side shift cylinder (20) in chain vise using rubber stripping to protect cylinder surface.  Use wooden block to protect transfer tube. CAUTION Do  not  allow   threaded   or   machined surfaces    to    come    in    contact    with other    metal    surfaces.        Clearances between    cylinder     components     are very  small,  any  minor  damage  done during     disassembly     could     require component replacement or make assembly difficult. NOTE The left head of the side shift cylinder and    right    head    of    the    side    shift cylinder  are  removed  the  same  way. Right side is shown. (6) Position drain pan under side shift cylinder (20). (7) Position piston rod (37) out of side shift cylinder (20) 4 in.  (10.16 cm). WARNING Use  extreme  care  when  removing  or  installing  spring  retaining  rings.    Spring  retaining  rings  are under tension and can act as projectiles when released suddenly.  Ensure proper eye protection is worn to prevent injury to personnel. (8) Remove retaining ring (38), spacer (39), and preformed packing (40) from side shift cylinder (20) and head (41). 15-79