TM10-3930-660-34 16-16.  BOOK EXTEND CYLINDER - REPLACE/REPAIR (Cont’d) e. Remove rod (42) and piston assembly from barrel (44). f. Place rod (42) and piston assembly on suitable supports to prevent damage. g. Remove two wear rings (46). CAUTION Do not nick or scratch seal groove on piston (49) during removal of seal (47).  Failure to follow this precaution will cause part damage. h. Cut seal (47) and discard. NOTE The nut (48) may need to be heated with a torch for removal. i. Remove nut (48) and piston (49).  Discard nut (48). j. Remove and discard O-ring (50) from piston (49) bore. k. Remove tube (51) and gland (43) off rod (42). l. Remove O-rings (45 and 52) and backup ring (53) from gland (43).  Discard O-rings (45 and 52). CAUTION Do not nick or scratch seal groove inside gland (43) during removal of seal (54) and rod wiper (55).  Failure to follow this precaution will cause part damage. NOTE Note direction that lip of seal (54) is facing before removal. m. Remove seal (54) and rod wiper (55) from inside of gland (43). 16-102