4. Turn the start switch to START position. Start the
COLD WEATHER STARTING
engine using starting aids as necessary.
These engines are designed to start at temperatures
above 10 F without using starting aids. If temperature is
below 10°F, a starting aid may be necessary and/or
If the engine fails to start after 30 seconds of cranking,
allow the starter to cool for two minutes before repeating
the starting procedure.
ETHER - Ether is much more volatile than diesel fuel
and is used to start combustion of the fuel-air mixture.
Do not engage the starter when the
flywheel is moving.
Ether is volatile and must be stored
away from heat and direct sunlight.
See the instructions on the container.
5. As the engine starts, release the start switch. It will
return to the RUN position.
Engine mounted either dispensers are available
commercially. Aerosol cans can also be used. Point the
Clearances and tolerances are designed for operating
can opening at the air inlet and give a quick spray while
conditions - including operating temperature. After the
cranking the engine.
Too much ether will cause
engine is started it takes several minutes to establish the
excessively high pressure and detonation. Liquid ether can
lubricating oil film and allow the moving parts to heat up
be used by pouring a small amount on a cloth and holding
and expand. Loading a cold engine will cause shortened
the cloth in front of the air cleaner while the engine is
service life; i.e., broken rings, seized pistons, etc. This
cranking. Be sure the cloth is outside the air cleaner and
warm up period allows time for another "walk-around"
cannot be drawn into the engine.
check for leaks, etc.
DO NOT use ether after the engine has
started. DO NOT inhale ether fumes.
Do not attempt repairs or adjustments
while the engine is running.
In extremely cold climates, additional aids such as
water heaters and battery heaters may be used. Contact
your Caterpillar dealer before installing submersible
3. Reduce speed to low idle for about 30 seconds.
1. Remove the load from the engine.
4. Stop the engine by turning the START switch to
2. Allow the engine to run at about half speed for five
OFF. The governor control will not stop the
minutes. This allows internal temperatures to
reduce gradually and prevents the loss of coolant
If an engine is going to be put in storage see your
Caterpillar dealer for storage instructions.
pressure relief valve. Stop the engine immediately if a
Gauges provide a "look" inside the engine. Be sure
sudden loss of oil pressure occurs.
they are in good working order. You can determine what is
"normal" operating range by observing the gauges over a
WATER TEMPERATURE - The operating temperature
period of time. The cause of any sudden or significant
is maintained by the water temperature regulator. High
change in the readings should be determined and
coolant temperatures mean the cooling system is not
dissipating enough engine heat.
OIL PRESSURE - Oil pressure is normally greatest
The minimum operating temperature should not be
after starting a cold engine. As the oil warms up the
below 175° If the temperature gauge continues to indicate
pressure drops. Oil pressure is greater at operating speeds
below 175° while operating, have the gauge checked for
than at low idle. Fluctuating readings can mean air in the
oil or a sticking
accuracy and the thermostats checked for proper