BOOM EXTEND CYLINDER REPLACEMENT/REPAIR - continued

TM 10-3930-673-34

b. Disassembly.

(1)

Use a vise with soft jaws to secure cylinder in

a horizontal position for disassembly.

WARNING

Hydraulic oil, under pressure, can remain

within cylinder after disconnecting

hydraulic hoses. To avoid severe personal

injury, slowly loosen counterbalance

valve. and allow pressure to escape before

removing valve entirely.

(2)

Remove two elbows (8) and preformed

packings (23) from boom extend cylinder (2).

Discard preformed packings.

TR01435

NOTE

Note and mark location of counterbalance

valves for use during assembly. Counterbalance valves are not interchangeable.

(3)

If damaged, remove two counterbalance valves (24 and 25) from boom extend cylinder (2).

(a)

Remove back-up rings (26 and 27), two back-up rings (28), and preformed packings (29, 30, and 31) from

counterbalance valve (24). Discard preformed packings.

(b)

Remove back-up rings (32, 33, and 34) and preformed packings (35, 36, and 37) from counterbalance valve

(25). Discard preformed packings.

16-101