16-18. BOOM EXTEND CYLINDER REPLACEMENT/REPAIR (CONT)
Disassemble boom extend cylinder (2) parts
(38 through 52).
Remove needle valve (38) from boom
extend cylinder (2).
Do not scratch or damage the wear
surface of rod, piston, or gland.
Pull rod (39) out approximately 5 in. (127
mm) for removal of gland (40).
Place a container under gland (40) to
catch oil contained in cylinder.
Use a spanner wrench to remove gland
(40) from barrel (41). Pull gland out of
cylinder far enough to unseat preformed
packing (42). Allow oil to drain into
container. Discard preformed packing.
Use care when removing rod and piston assembly to prevent wear ring damage. Keep rod in line with
cylinder tube to prevent binding.
Remove rod (39) and piston assembly from barrel (41).
Place rod (39) and piston assembly on suitable supports to prevent damage.