TM 55-4920-432-13&P
4-27. PRESSURE RELIEF VALVE
4-27
THIS TASK COVERS:
REMOVAL AND INSTALLATION
Initial Set-Up:
Personnel Required:
68F Aircraft Electrician
or
35H TMDE Support Specialist
Tools and Equipment:Tool kit (B2) or Shop Set (B4)
Material/Parts:
Pressure relief valve, Tape (D9)
References:
TB
43-180
Equipment Condition: Power disconnected, control
panel open
1.
REMOVAL:
a.
Disconnect hose from fitting (1) on relief valve (2).
b.
Remove two nuts (3), lock washers (4), and flat washers (5) from support bracket (6).
c.
Remove four screws (7), lock washers (8) and flat washers (9) from relief valve.
d.
Remove fitting and vent plug (10) from relief valve.
2.
INSTALLATION:
a.
Apply tape (D9) to vent plug and fitting threads.
b.
Install fitting and vent plug into relief valve (2).
c.
Position relief valve on support bracket (6) and secure with four flat washers (9), lock washers (8),
and screws (7).
d.
Position support bracket and relief valve on chassis, secure with two flat washers (5), lock washers
(4) and nuts (3).
e.
Install hose on fitting (1).
FOLLOW ON MAINTENANCE
Calibration (TB 43-180)
Performance check (para. 2-5)
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