TM 10-3930669-34 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. (7) Install preformed packing (40), spacer (39), and retaining  ring  (38)  in  side  shift  cylinder  (20)  and head (41). (8) Install fitting (36) on yoke sheave (28). (9) Install  two  bearings  (35)  and  rod  wiper  (34)  on yoke sheave (28). (10) Install   chain   guides   (32),   bearings   (33),   chain guides   (32),   and   two   bearings   (31)   on   yoke sheave (28) with four screws (30). (11) Install spacer (29) and yoke sheave (28) on side shift cylinder (20). 15-83