TM 5-5420-280-23&P
0076 00
HYDRAULIC PRESSURE RELIEF VALVES AND SOLENOID REPLACEMENT (Contd)
REMOVAL
CAUTION
Cap or plug all hoses, tubes, connections, and openings immediately
after disconnection to prevent contamination. Remove caps or plugs
prior to installation. Failure to do so may result in damage to
equipment.
NOTE
Tag tubing for installation.
Have container ready to catch oil.
1.
Loosen screw (1) and disconnect electrical plug (2) from receptacle (3) on solenoid (24) on hydraulic
pressure relief valve (6).
2.
Loosen nut (22) and disconnect steel tube (21) and tube seal (9) from adapter (23) on rear valve (6).
Discard tube seal (9).
3.
Loosen nut (10) and disconnect steel tube (11) and tube seal (9) from adapter (8) on valve (6).
Discard tube seal (9).
4.
Loosen nut (15) and disconnect steel tube (16) and tube seal (9) from adapter (19) on valve (6).
Discard tube seal (9).
5.
Loosen nut (13) and disconnect steel tube (14) from adapter (12) on valve (6). Discard tube seal (9).
6.
Remove two nuts (18), washers (5), screws (4), and valve (6) from two brackets (17) on pallet (20).
7.
If necessary, remove adapters (8), (12), (19), and (23) and four O-rings (7) from valve (6). Discard
O-rings (7).
INSTALLATION
NOTE
Apply a light coat of hydraulic oil to O-rings and tube seals at
installation.
Install tubing as noted at removal.
1.
If removed, install four new O-rings (7) and adapters (23), (19), (12), and (8) on valve (6).
2.
Install valve (6) on two brackets (17) of pallet (20) with two screws (4), washers (5), and nuts (18).
3.
Connect steel tube (14) to adapter (12) with new tube seal (9) and tighten nut (13).
4.
Connect steel tube (16) to adapter (19) with new tube seal (9) and tighten nut (15).
5.
Connect steel tube (11) to adapter (8) with new tube seal (9) and tighten nut (10).
6.
Connect steel tube (21) to adapter (23) with new tube seal (9) and tighten nut (22).
7.
Connect electrical plug (2) to receptacle (3) on solenoid (24) of valve (6) and tighten screw (1).
NOTE
The pallet hydraulic system is self-bleeding, and with exception of
the telescopic tube hydraulic cylinders, there is no requirement for
bleeding air from the system.
8.
Operate hydraulic system and check for leaks. Refer to TM 5-5420-280-10.
9.
Install bridge halves on bridge pallet. Refer to WP 0018 00.
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