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 TM 5-2420-224-34
CRANE
INNER
BOOM
LIFT
CYLINDER
REPAIR
(CONT)
1 0 . USING suitable PRESS, REMOVE two
BUSHINGS (18) from crane inner boom lift
cylinder (2).
11. REMOVE three PLUGS (19).
12. REMOVE counterbalance VALVE (20) from
crane inner boom lift cylinder (2).
13. REMOVE and DISCARD backup RING (21),
PACKING (22), backup RING (23), PACKING
(24), backup RING (25), and PACKING (26)
from counterbalance valve (20).
ASSEMBLY
NOTE
Procedure is the same for both
inner boom lift cylinders.
Apply coat of lubricating oil to
p a c k i n g s , O-rings, and seals
prior to assembly.
1.
INSTALL new PACKING (1), new backup
RING (2), new PACKING (3), new backup
R I N G (4), new PACKING (5), and new
backup RING (6) on counterbalance valve (7).
2.
INSTALL counterbalance VALVE (7) in crane
inner boom lift cylinder (8).
INSTALL three PLUGS (9).
3.
20-215
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