TM 9-2330-384-14&P
4-83. PILOT VALVE MAINTENANCE (Con't).
e. BENCH TEST
WARNING
Compressed air used for testing
purposes must not exceed 30 psi
(207 kPa). Wear protective cloth-
ing (goggles, face shield, and
gloves) and use caution to avoid
injury to personnel.
NOTE
Bench test should be performed
after repair of pilot valve (1) to en-
sure that valve will operate prop-
erly.
Apply clean compressed air
(1)
through top port (3) of pilot valve
(1). Check that pilot valve opens.
Valve disk (11) will be pushed
down if pilot valve is open.
Apply clean compressed air
(2)
through top port (3) of pilot valve
(1). Check for leaks. No leakage
in pilot valve is allowed.
If pilot valve (1) does not open
(3)
with compressed air applied
through top port (3), or if there is
any leakage, replace pilot valve.
f. INSTALLATION
install new preformed packing (12) and
pilot valve (1) to emergency valve
(13).
FOLLOW-ON TASKS:
Connect fittings and jet level sensor tubing to
pilot valve (see paragraph 4-70).
4-280
