i08031604
Effets
du
froid
sur
le
carburant
Nota:
Only
use
grades
of
fuel
that
are
recommended
by
Perkins.
Refer
to
this
Operation
and
Maintenance
Manual,
“Fluid
Recommendations”.
Properties
of
the
diesel
fuel
can
have
a
significant
effect
on
the
engine
cold
start
capability.
It
is
critical
that
the
low
temperature
properties
of
diesel
fuel
are
acceptable
for
the
minimum
ambient
temperature
the
engine
is
expected
to
see
in
operation.
Following
properties
are
used
to
define
fuels
low
temperature
capability:
• Cloud point
• Pour point
• Cold Filter Plugging Point (CFPP)
The cloud point of the fuel is the temperature at
which waxes naturally found in the diesel fuel begin
to form crystals. The cloud point of the fuel must be
below lowest ambient temperature to prevent filters
from plugging.
Pour point is the last temperature before the fuel flow
stops and waxing of the fuel will start.
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”.
i08031596
Constituants
du
circuit
de
carburant
et
temps
froid
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
Nota:
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.
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M0092609-04