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 TM 5-5420-279-23
a.
Remove
1
(1)
Ensure that the crane is in the folded
position.
(2)
De-pressurise the hydraulic system. See
unit maintenance procedure 5-118.
(3)
Remove the hydraulic hose (6) from the
load holding valve (3).
(4)
Remove the hydraulic pipe (5) from the
load holding valve (3).
7
(5)
Undo the connection (2) between the
brake valve (7) and the load holding
valve (3).
2
(6)
Remove the four bolts (4) securing the
load holding valve (3) to the lift cylinder
(1).
(7)
Remove the load holding valve (3).
3
(8)
Check all threaded components for
6
damage or wear.
4
(9)
Replace components as necessary.
b.
Install
5
(1)
Fit the load holding valve (3) to the jib
cylinder (1) and secure in place with the
four bolts (4).
(2)
Fit the connection (2) between the brake
valve (7) and the load holding valve (3).
(3)
Fit the hydraulic hose (6) to the load
holding valve (3).
(4)
Fit the hydraulic pipe (5) to the load holding valve (3).
c.
Follow on tasks
(1)
Check the operation of the crane in accordance with the operator's manual TM 5-5420-
279-10.
(2)
Check for hydraulic oil leaks.
6-241
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