q. (Fig. 2-2.) On the electrical unit, press the SOLENOID SHUTOFF switch to OPEN. The CLOSED light
shall go out and the OPEN light shall come on. On the hydraulic unit, the SOLENOID valve light shall come on.
r. (Fig. 2-3.) Press the SOLENOID valve down to CLOSED position. The knob light shall go out.
s. Pull the SOLENOID valve to OPEN position. The knob light shall come on.
t. (Fig. 2-2.) On the electrical unit, press the SOLENOID SHUTOFF switch to CLOSED. The SOLENOID
SHUTOFF OPEN light shall go out, and the CLOSED light shall come on. On the hydraulic unit, the SOLE-
NOID valve knob light shall go out.
u. On the electrical unit, press the SOLENOID SHUTOFF switch to OPEN and then to CLOSED. The SO-
LENOID valve in the hydraulic unit shall be heard to operate.
v. Set all switches and valves to the positions listed in tables 2-1 and 2-2.
w. Perform fill and bleed procedures (para 2-8) and high pressure self test (para 2-9) before mounting a com-
ponent to be tested.
2-8. Fill and Bleed Procedures.
Fill and bleed procedures are to be accomplished any time air has entered the lines or the hydraulic unit is dis-
connected from the hydraulic test stand. A 2-quart container with a pint of clean hydraulic fluid is required. If
leaks occur, shut down the equipment and repair the leak. Fill and bleed as follows:
Hydraulic fluid is toxic. It can irritate skin and cause burns. Avoid
inhaling. Use only with adequate ventilation. Avoid contact with
skin, eyes, or clothing. In case of contact, immediately flush skin or
eyes with water for at least 15 minutes. Get medical attention for
a. Set the switches and valves to the initial settings. (Tables 2-1 and 2-2.)
b. Perform the self-test procedures in para 2-7.
c. (Fig. 2-3.) Check that the hydraulic unit HIGH PRESS and LOW PRESS gauges indicate O, within 1 scale
d (Fig. 2-6.) Check that the hydraulic supply valve is closed and the return valve is open.
e. Start the shop hydraulic power supply. Adjust for 500 psi and 1.5 gpm output.
j (Fig. 2-2.) Set the electrical unit power switch to ON. The LAMP TEST and POWER light shall come on.
Press the SOLENOID SHUTOFF switch to OPEN.
g. (Fig. 2-6.) Check that the external hydraulic power supply valve on the return line is open. Then open the
valve on the pressure supply line.
Do not operate SOLENOID SHUTOFF VALVE when the HIGH PRES-
SURE REGULATOR is at partial or full increase. The HIGH PRES-
SURE gauge can be damaged.
h. (Fig. 2-3.) Pull the SOLENOID valve to OPEN. The LOW PRESS gauge shall indicate 50 to 60 psi. The
SOLENOID lens light shall come on.
Rotate the HIGH PRESS REGULATOR toward INCREASE until the HIGH PRESS gauge increases 50