TM 5-6115-465-12
TO 35C2-3-446-1
NAVFAC P-8-625-12
TM 06858B/06859D-12
(b) Suspend a reliable thermometer in
(7) If limit switch failed continuity test, re-
the water so that is temperature sensing end is under
ort to higher level maintenance.
water but not touching the sides or bottom of the
h. Thermostat Switch.
container.
(c) Connect an ohmmeter across the ter-
( 1 ) Removal.
minals of the thermostat switch.
(a) Refer to paragraph -31 and drain
(d) Gradually heat the water stirring
the generator set radiator.
constantly to evenly distribute the heat.
(b) Tag and disconnect electrical leads to
thermostat (37, figure 4-1).
(e) Observe both the ohmmeter and ther-
mometer. The ohmmeter should indicate continuity
(c) Remove thermostat switch.
up to a temperature of 155 5F (68.4 2.8C).
Above this temperature, the ohmmeter should indi-
(2) Cleaning and Inspection.
cate an open circuit.
(a) Clean thermostat switch with an ap-
(f) Remove the heat and allow the water
proved solvent and dry thoroughly with filtered com-
to cool.
pressed air.
(b) Visually inspect switch for cracks,
(g) Ohmmeter should indicate continuity
at a temperature of +135 5F (+56.2 2.8C).
corrosion, stripped or damaged threads, and evid-
ence of shorting or other damage.
(h) Replace thermostat switch if it is
(3) Testing.
damaged or fails to operate properly.
(a) Suspend thermostat switch in a con-
tainer of clean water so that its temperature sensor
(4) Installation. Install thermostat switch in
is completely immersed in water, but not touching
reverse order of removal procedures.
bottom or sides of the container.
ELECTRIC WINTERIZATION KIT
Section III.
(2) Remove "WATER" plug (68, figure 4-5)
GENERAL.
from center, right-rear of engine cylinder block.
The electric winterization kit uses an external
(3) Remove plug (69) from right side of eng-
power source to maintain the engine coolant and
ine water pump assembly.
lubricating oil at normal operating temperature in
situations which require immediate starting of the
(4) Remove plug (70) from engine oil pan heat
generator set. The kit will function effectively down
exchanger.
to an ambient temperature of -65F (-53.9C). Cool-
ant from the radiator is pumped into the heater as-
(5) Remove cover plate (71) from heater con-
sembly where it is heated by the heater elements.
trol assembly mounting hole located to the right of the
From the heater assembly, the heated coolant pass-
generator set control cubicle assembly.
es through the heat exchanger in the engine crank-
case to heat the lubricating oil. After leaving the
heat exchanger, the coolant is pumped through the
cylinder block and returned to the radiator. The
NOTE
electric winterization kit may be installed on a gen-
erator set which is equipped with a fuel burning
Retain cover plate attaching hardware.
winterization kit. Power for operation of the kit may
It is used to install heater control as-
be obtained from any 205 to 240 volt, 50/60 Hz or
sembly.
400 Hz, single phase source.
ELECTRIC WINTERIZATION KIT
INSTALLATION AND REPLACEMENT.
a. Installation.
(6) Install electric winterization kit by follow-
(1) Drain generator set cooling system (para-
ing the ascending sequence of index numbers (1 through
graph 3-31)
71) assigned to figure 4-5.
