CONTROLS AND OPERATION
2. Drain and flush the cooling system, to insure
can produce chromium hydroxide, commonly
proper circulation of coolant throughout the radia-
known as "green slime".
t o r c o r e . C l e a n the radiator cooling fins,
particularly the air passages through the core.
3. Keep the battery fully charged at all times. The
Check the condition of the radiator hoses, clamps,
electrolyte in a discharged battery will freeze at a
thermostat, and radiator core.
higher temperature than that in a fully charged bat-
When freeze protection is required, an ethylene
glycol base permanent antifreeze should be used.
An inhibitor system is included in this type of anti-
freeze and no additional inhibitors are required in
If it is necessary to add water to the battery,
initial fill, if a minimum antifreeze concentration of
do so only immediately before or during op-
30% by volume is used. Solution of less than 30%
eration, or with an external charger connected
concentration does not provide sufficient corrosion
to the battery. Charging the battery, by any
protection and additional inhibitors may have to be
means, mixes the water and electrolyte, and
added. Concentrations over 67% adversely affec t
thereby prevents the water from freezing.
Keep the battery terminal connections clean and
free from snow and ice which could short circuit
the terminals. Clean the cable connectors and bat-
tery posts thoroughly, using a soda and water
solution to remove corrosion.
move the battery and store it in a heated area if
the machine is to be idle overnight or for any ex-
4. Keep the fuel tank as full as possible at all times
the fuel supply, drain the tank and refill it with clean
5. Start the engine in accordance with the engine
manufacturer's recommendations for cold weather
starting, and run it at approximately 1200 RPM until
the engine has warmed up.
Cover part of the radiator, to aid warmup and
to maintain engine running temperature. Dur-
ing warmup only, the entire radiator may be
Figure 2-12. Antifreeze Concentration and Temperature
The correct grade of oil for the prevailing ambient
temperature should be used in the crankcase to
Inhibitor depletion will occur in ethylene glycol base
prevent hard cranking. The diesel fuel should have
antifreeze through normal service. The inhibitor
a pour point of 10°F less than the lowest expected
should be replenished at approximately 500 hour
intervals with a non-chromate inhibitor system.
temperature. In case of emergency, white kero-
sene may be added to the fuel to bring the pour
point down to the required temperature in order to
A high quality corrosion inhibitor can be added
prevent clogging of filters and small passages by
to the cooling system, if desired. Do not, how-
wax crystals. The addition of kerosene is NOT rec-
ever, use a chromate base inhibitor with an
ommended for general use.
ethylene glycol antifreeze. That combination
*U.S. GOVERNMENT PRINTING OFFICE: 1990 743-024/20123