Cold Filter Plugging Point (CFPP) is a temperature at
which a particular fuel will pass through a
standardized filtration device. This CFPP gives an
estimate of the lower operability temperature of fuel
Be aware of these properties when diesel fuel is
purchased. Consider the average ambient air
temperature for the engines application. Engines that
are fueled in one climate may not operate well if the
engines are shipped to colder climate. Problems can
result due to changes in temperature.
Before troubleshooting for low power or for poor
performance in the winter, check the fuel for waxing
The following components can provide a means of
minimizing fuel waxing problems in cold weather:
• Fuel heaters, which may be an OEM option
• Fuel line insulation, which may be an OEM option
Winter and arctic grades of diesel fuel are available in
the countries and territories with severe winters. For
more information refer to the Operation and
Maintenance Manual, “Fuel For Cold-Weather
Operation”
Another important fuel property which can affect cold
start and operation of diesel engine is Cetane
number. Detail and requirements of this property are
given in this Operation and Maintenance Manual,
“Fluid Recommendations”.
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Fuel
Related
Components
in
Cold
Weather
Fuel
Tanks
Condensation
can
form
in
partially
filled
fuel
tanks.
Top
off
the
fuel
tanks
after
you
operate
the
engine.
Fuel
tanks
should
contain
some
provision
for
draining
water
and
sediment
from
the
bottom
of
the
tanks.
Some
fuel
tanks
use
supply
pipes
that
allow
water
and
sediment
to
settle
below
the
end
of
the
fuel
supply
pipe.
Some
fuel
tanks
use
supply
lines
that
take
fuel
directly
from
the
bottom
of
the
tank.
If
the
engine
is
equipped
with
this
system,
regular
maintenance
of
the
fuel
system
filter
is
important.
Drain the water and sediment from any fuel storage
tank at the following intervals: weekly, service
intervals and refueling of the fuel tank. Draining will
help prevent water and/or sediment from being
pumped from the fuel storage tank and into the
engine fuel tank.
Fuel Filters
After you change the fuel filter, always prime the fuel
system to remove air bubbles from the fuel system.
Refer to the Operation and Maintenance Manual in
the Maintenance Section for more information on
priming the fuel system.
The micron rating and the location of a primary fuel
filter is important in cold-weather operation. The
primary fuel filter, and the fuel supply line are the
most common components that are affected by cold
fuel.
Fuel Heaters
Note:
The OEM may equip the application with fuel
heaters. If so, the temperature of the fuel must not
exceed 80° C (176° F) at the fuel transfer pump. The
fuel heater should be installed before the electric lift
pump.
For more information about fuel heaters (if equipped),
refer to the OEM information.
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