TM 9-4940-549-14&P
Manual Shutdown Control. A manual quick-stop control for stop-
g.
ping the engine. To stop the engine, pull the control out (fig.
Primer. For cold weather operation only. Do not operate unless
h.
engine is being cranked by the starting motor. Pressing the button
actuates the starting aid solenoid.
Shutter Control. The shutter control (fig. 22) is used to open and
i.
close the radiator shutters to decrease the engine warmup time, and
to maintain normal engine temperature when operating in unusually
cold temperatures. Turn knob counterclockwise to close shutters.
Open shutters when the engine operating temperature reaches
normal, by turning the knob clockwise. When the engine is running
with the radiator shutters closed, constant surveillance of the
instruments must be maintained to prevent damage to the engine by
overheating.
Fuel Level Gage. The fuel level gage (fig. 2-2) shows the amount
j.
of fuel in the engine fuel tank when the battery switch is turned
on.
Battery Alternator Voltage Indicator. The yellovw and red on the left
k.
side of the battery generator voltage indicator (fig. 2-2), shows the
condition of the batteries with the engine stopped and with the bat-
tery switch (fig. 2-2) turned on. The needle pointing to the separa-
tion between yellow and red indicates 22-volts, to red, indicates
lower voltage; and yellow indicates higher voltage. When the engine
is running, the green and red on the right side of the voltage indi
cater shows the DC voltage charging rate of the generator. The
needle pointing to the offset at top of green, indicates 281/2 volt
charging rate. When the engine is running at normal operating speed,
the needle should point to green. If the needle points to red or
yellow, stop the engine to prevent further damage to the charging
system.
1.
Coolant Temperature Gage. The coolant temperature gage (fig. 2-2)
indicates the temperature of the coolant in the engine. The normal
operation temperature should be between 180 and 195 F.
High Coolant Temperature Warning Light. The warning light, (fig.
m.
too hot for the safe operation of the engine. If the coolant tem-
perature reaches 212 F., the warning light will glow red, and the
engine must be stopped to prevent damage.
n.
Oil Pressure Gage. The gage (fig. 22) indicates the engine oil
pressure. When the engine is running at normal operating temper-
ature and speed, the oil pressure should be 40 to 60 pounds. A
cold engine will have a higher oil pressure and a hot engine will
have lower oil pressure.
