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2-8.1
TM 55-4920-400-13
e. Loosen locking nut (fig. 2-2) and turn adjust-
ment screw until associated microswitch is actu-
ated and solenoid valves are heard to operate at re-
quired safety relief point. Turn vacuum bellows
adjustment screw clockwise to decrease and coun-
terclockwise to increase the vacuum at which mi-
croswitch is actuated. Turn pressure bellows adjust-
ment screw counterclockwise to decrease and
clockwise to increase the pressure at which micro-
switch is actuated.
f. Tighten locking nut on adjustment screw or
screws which were reset, being careful not to dis-
turb setting of adjustment screw.
g. Turn off test set in accordance with procedure
given in paragraph 2-27.
k. Replace bottom front panel of test set and se-
cure 10 captive fasteners.
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