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HYDRAULIC SYSTEM - DIRECTIONAL CONTROL VALVE
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TM-5-5420-279-23 Dry Support Bridge (DSB) (NSN
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Follow on tasks - TM-5-5420-279-230629
TM 5-5420-279-23
NOTE
This procedure is a general procedure for changing all Directional Control Valves.
a.
Remove
(1)
De-pressurize hydraulic system. Refer
to unit maintenance procedure 5-118.
4
(2)
Disconnect the electrical connections
(4) to the directional control valve (1).
Refer to unit maintenance procedure
5
5-141.
(3)
Remove and retain the four screws (5)
securing the directional control valve
(1) to the manifold assembly.
(4)
Ensure that the four seals (2) are
removed from the manifold assembly
when the directional control valve (1) is
removed.
(5)
Cover exposed ports to exclude the
1
ingress of dirt and moisture. Replace
valve as soon as possible.
(6)
If a cartridge throttle (3) is fitted to the
pressure port, 'P' channel of the
directional control valve (1) remove
4
and clean it.
b.
Install
(1)
Ensure mounting surfaces are clean.
(2)
If required, fit the cartridge throttle (3) to the pressure, 'P' channel in the new directional
control valve (1).
(3)
Ensure that the four seals (2) are fitted to the directional control valve (1).
(4)
Fit the directional control valve (1) to the manifold assembly and insert the four screws (5)
retained during removal. Use thread-locking compound on the screw threads.
(5)
Tighten the four screws (5) evenly to ensure a good seal between the directional control
valve (1) and the manifold assembly.

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