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 TM 5-5420-279-23
a.
Remove
(1)
Ensure that the crane is in the folded
1
position.
(2)
De-pressurise the hydraulic system. See
unit maintenance procedure 5-118.
7
(3)
Remove the solenoid valve electrical
2
cable (5) from the brake valve (3).
3
(4)
Remove the hydraulic hose (4) from the
brake valve (3).
4
(5)
Undo the connection (6) between the
brake valve (5) and the load holding
valve (7).
6
(6)
Remove the two bolts (3) securing the
brake valve (2) to the jib cylinder (1).
(7)
Remove the brake valve (2).
5
(8)
Check all threaded components for
damage or wear.
(9)
Check the electrical cable for damage.
(10)
Replace components as necessary.
b.
Install
(1)
Fit the brake valve (2) to the jib cylinder
(1) and secure in place with the two bolts
(3).
(2)
Fit the connection (6) between the brake valve (5) and the load holding valve (7).
(3)
Fit the hydraulic hose (4) to the brake valve (3).
(4)
Fit the solenoid valve electrical cable (5) to the brake valve (3).
c.
Follow on task
(1)
Switch the battery shutoff switch to the on position.
(2)
Check the operation of the crane in accordance with the operator's manual TM 5-5420-
279-10.
(3)
Check for hydraulic oil leaks.
6-231
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