FRONT ATTACHMENT / Cylinder 5. Cut away the crimped position by using a hand drill and remove set screw (13). Remove steel ball (14). 9. Remove O-ring (10) and backup rings (9, 3) from cylinder head (6). Remove wiper ring (2), U-ring (4), buffer ring (5), snap ring (8) and bushing (7). Special tool when removing bushing Boom cylinder: ST 8027 Arm cylinder: ST 8022 Bucket cylinder: ST 8021 10. (Arm cylinder only) Remove stoppers (17) (2 used) from piston rod (1) by using a screwdriver. Remove cushion bearing (18), cushion seal (19) and snap ring (20). NOTE: Set screw (13) has been caulked by using a punch at two places after installing. Boom cylinder, Bucket cylinder : 6 mm Arm cylinder :
8 mm 6. Remove nut (15) (bucket cylinder: piston nut (29)) by using special tool (ST 5908) and special tool for nut. Remove shim (16), piston (26), cushion bearing (27) and cushion seal (28) from piston rod (1). (Shim (16), piston (26) and cushion seal (26) are not equipped for the bucket cylinder. Special tool when turning nut: Boom cylinder, Bucket cylinder: ST 3247 Arm cylinder: ST 3276 Special Tool: ST 5908 W158-04-02-022 7. Remove seal ring (25), slide rings (22) (2 used), (21) (2 used), O-ring (24) and backup rings (23) (2 used) from piston (26) (bucket cylinder: piston nut (29)). 8. Remove cylinder head (6) from piston rod (1). W4-2-23