BOOM HOIST CYLINDER REPAIR - continued

TM 10-3930-673-34

CAUTION

Do not scratch or damage the wear surface of rod, piston, or gland. Follow this

precaution to prevent failure of the cylinder.

(a)

Use a suitable tool to pull rod (9) out approximately 5 in. (127 mm) for removal of gland (10).

(b)

Place a container under gland (10) to catch oil contained in cylinder.

(c)

Use a spanner wrench to remove gland (10) from cylinder tube (2). Pull gland out of cylinder

far enough to unseat preformed packing (11). 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.

(d)

Remove rod (9) and piston (12) as an assembly from cylinder tube (2).

(e)

Place rod (9) and piston (12) assembly on suitable supports to prevent damage.

(f)

Remove two wear rings (13) from piston (12).

CAUTION

Do not nick or scratch seal groove during removal of seal. Failure to follow this

precaution will cause part damage.

(g)

Remove seal (l4) from piston (12).

NOTE

The nut may need to be heated with a torch for removal.

(h)

Remove nut (15) and piston (12) from rod (9). Discard nut.

(i)

Remove preformed packing (16) from piston (12) bore. Discard preformed packing.

(j)

Remove tube (17) from rod (9).

(k)

Remove gland (10) from rod (9).

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