BOOM EXTEND CYLINDER REPLACEMENT/REPAIR - continued

TM 10-3930-673-34

16-18. BOOM EXTEND CYLINDER REPLACEMENT/REPAIR (CONT)

(4)

Disassemble boom extend cylinder (2) parts

(38 through 52).

(a)

Remove needle valve (38) from boom

extend cylinder (2).

CAUTION

Do not scratch or damage the wear

surface of rod, piston, or gland.

(b)

Pull rod (39) out approximately 5 in. (127

mm) for removal of gland (40).

(c)

Place a container under gland (40) to

catch oil contained in cylinder.

(d)

Use a spanner wrench to remove gland

(40) from barrel (41). Pull gland out of

TR01436

cylinder far enough to unseat preformed

packing (42). Allow oil to drain into

container. Discard preformed packing.

CAUTION

Use care when removing rod and piston assembly to prevent wear ring damage. Keep rod in line with

cylinder tube to prevent binding.

(e)

Remove rod (39) and piston assembly from barrel (41).

(f)

Place rod (39) and piston assembly on suitable supports to prevent damage.

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