NOTICE
In order to maximize fuel system life and prevent pre-
mature wear out from abrasive particles in the fuel, a
two micron absolute high efficiency fuel filter is re-
quired for all Caterpillar Electronic Unit Injectors. Cat-
erpillar High Efficiency Fuel Filters meet these
requirements. Consult your Caterpillar dealer for the
proper part numbers.
Fuel Heaters
Fuel heaters help to prevent fuel filters from plugging
in cold weather due to waxing. A fuel heater should
be installed in the fuel system before the primary fuel
filter.
The following fuel heaters are recommended for
Caterpillar engines:
• 7C-3557 Fuel Heater Group
• 7C-3558 Heater Kit
For further information on fuel heaters, consult your
Caterpillar dealer.
Disconnect the fuel heater in warm weather.
Note: Fuel heaters that are controlled by the water
temperature regulator or self-regulating fuel heaters
should be used with this engine. Fuel heaters that are
not controlled by the water temperature regulator can
heat the fuel in excess of 65°C (149°F). A loss of
engine power can occur if the fuel supply
temperature exceeds 37°C (100°F).
Note: Heat exchanger type fuel heaters should have
a bypass provision in order to prevent overheating of
the fuel in warm weather operation.
92
SEBU7125-13
Operation Section
Fuel Related Components in Cold Weather
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