TM55-4920-428-13
(6) Adjust the flow limiter and relief valves. (Ref para 5-43.)
b. Proof Pressure Test,
Safety goggles must be worn by operator and observers during this
test. Otherwise, injury to personnel can result.
(1) Set the shop hydraulic power supply to 4500 psi. Check that the return needle valve is open.
Open the supply needle valve. Hold pressure for 1 minute. There shall be no leaks. The HIGH PRESS
gage shall indicate 0 ± one scale division.
(2) Reduce the hydraulic power supply to 3750 psi.
(3) Check that the electrical unit SOLENOID SHUTOFF switch is OPEN. The switch OPEN
light shall be ON.
(4) Pull the hydraulic unit SOLENOID valve to OPENED. The knob light shall come ON.
(5) Set the HIGH PRESS REGULATOR to full INCREASE. The HIGH PRESS gage shall indi-
cate 3450 to 3550 psi. Hold this pressure for 1 minute. There shall be no leaks.
(6) Set the HIGH PRESS REGULATOR to full DECREASE.
(7) Push the SOLENOID valve knob to CLOSED the knob light shall go out.
(8) Reduce the hydraulic power supply to 3375 psi.
(9) Pull the SOLENOID valve knob to OPEN. The knob light shall come ON.
(10) Set the selector valves to the positions listed below.
ILCA PRESS SYS 2 - PRESS
ILCA PRESS SYS 1 - PRESS
SAS PRESS SYS 2 - PRESS
SAS PRESS SYS 1 - PRESS
(11) Turn the HIGH PRESS REGULATOR toward INCREASE until the HIGH PRESS gage in-
dicates 3375 psi or until the regulator is fully clockwise.
(12) Set the HIGH PRESS SHUTOFF VALVE to OPEN. Holding the pressure for 1 minute.
There shall be no leaks.
(13)
(14)
(15)
(16)
Set the HIGH PRESS REGULATOR to full DECREASE.
Set the HIGH PRESS SHUTOFF VALVE to full CLOSED.
Push the SOLENOID valve knob to CLOSED. The knob light shall go out.
Set the following selector valves to VENT, then to OFF.
ILCA PRESS SYS 2
ILCA PRESS SYS 1
SAS PRESS SYS 2
SAS PRESS SYS 1
5-16
