TM 5-4610-218-12
Figure 4-26. Twist Lock Receptacle Connector, With Cover Removed, Removal and Installation.
Section IX. MAINTENANCE OF LIGHTS, SWITCHES, CIRCUIT BREAKERS,
MOTOR STARTER AND TERMINAL PANEL
a. General. The low water level switch is moun-
WARNING
ted on the rim of the erdlator tank. It is a single pole
spring-loaded, plunger-type microswitch, which
Cry cleaning solvent, P-D-680, used to
normally stays open. Opening and closing of the
clean parts, is potentially dangerous.
switch is controlled by the float in the wet well.
Avoid repeated and prolonged
When the water is low, or there is no water in the
breathing of the vapors and skin con-
wet well, the float drops, allowing the float mech-
tact with the liquid. Do not use near
anism to contact the switch and close it. This causes
open flame or excessive heat. Use in a
the warning light and buzzer to operate, if the
well-ventilated area. The flash-point
warning light and buzzer toggle switch is in the
of P-D-680 is 100-138 F (38-59 C).
ON position. When the water in the wet well raises
the float to the present level, the float mechanism is
4-29. Low Water Level Warning Light.
raised off the switch, the switch opens and turns off
a. General. The low water level warning light is
the warning light and buzzer.
a red light located on top of the electrical control
cabinet. It works in injunction with the warning
remove the sensitive switch.
buzzer. If the light comes on during operation, it in-
c. Clean, Inspect and Replace.
dicates that the water in the wet well is low.
(1) Clean the switch with dry cleaning solvent
P-D-680.
low water level warning light.
(2) Inspect the switch for cracks, broken ter-
minals, springs and burned out contact connections.
semble the warning light.
4-30. Low Water Level Sensitive Switch.
(3) Replace a damaged or defective switch.
4-70
