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Right Hand A-Frame Guide Rollers and Hydraulic Motors
Up
TM-5-5420-279-23 Dry Support Bridge (DSB) (NSN
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Follow on tasks-continued - TM-5-5420-279-230350
TM 5-5420-279-23
a.
Remove
(1)
De-pressurize hydraulic system. Refer to procedure 5-118.
(2)
Place a suitable container under the raise cylinder to catch any spilled hydraulic fluid.
(3)
Remove the two upper bolts (4) and washers (5) securing the roller motor guard (3) in
place.
(4)
Remove the roller motor guard (3).
(5)
Note the position of and undo the connections of the hydraulic pipes attached at point (8)
on the guide roller assembly hydraulic motor (2).
(6)
Note the position of the electrical connections to the hydraulic motor solenoid valve.
(7)
Refer to maintenance procedure 5-141 and remove the electrical connection.
(8)
Remove the two lower socket head screws (4) and lock washers (5) securing the hydraulic
motor (2) to the guide roller assembly (1). Discard the lock washers (5).
NOTE
It may be necessary to remove the solenoid valve block connected to the Hydraulic Motor
to gain access to one of the four socket head screws.
(9)
Remove the hydraulic motor (2) from the guide roller assembly (1).
(10)
Remove and discard the hydraulic motor seal (6).
(11)
Check the threads of the socket head screws for damage.
(12)
Check the mating surfaces of the guide roller assembly (1) and the hydraulic motor (2) for
damage.
(13)
Check that the support roller shaft seal (7) is not damaged.
(14)
Replace as necessary.
b.
Install
(1)
Fit a new seal (6) to the hydraulic motor (2).
(2)
Apply thread-locking compound to the socket head screws (4).
(3)
Fit the hydraulic motor (2) and the roller motor guard (3) to the guide roller assembly (1)
with the socket head screws (4) and lock washers (5).
NOTE
Fit the solenoid valve block to the Hydraulic Motor if removed.
(4)
Connect the hydraulic pipes to the hydraulic motor (2) in the positions noted during
removal.
(5)
Fit the electrical connection to the solenoid valve.
(6)
Cover the electrical connection securing screw head with silicone.
c.
Follow on tasks
(1)
Switch the battery shutoff switch to the on position.
5-93

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