36 SEBU8337
Operation Section
Cold Weather Operation
i02576035
Fuel and th e Effect from Cold
Weather
Note: Only use grades of fuel that are recommended
by Perkins. Refer to this Operation and Maintenance
Manual, “Flui
d Recommendations”.
The following fuels can be used in this series of
engine.
•
Group 1
•
Group 2
•
Group 3
•
Special Fuels
Perkins prefer only Group 1 and Group 2 fuels for
use in this series of engines.
Group 1 fuels are the preferred Group of Fuels for
general use by Perkins. Group 1 fuels maximize
engine life a
nd engine performance. Group 1 fuels
are usually less available than Group 2 fuels.
Frequently, Group 1 fuels are not available in colder
climates du
ring the winter.
Note: Group 2 fuels must have a maximum wear
scar of 650 m
icrometers (HFRR to ISO 12156-1).
Group 2 fuels are considered acceptable for issues
of warrant
y. This group of fuels may reduce the life
of the engine, the engine’s maximum power, and the
engine’s fuel efficiency.
When Group 2 diesel fuels are used the following
components provide a means of minimizing problems
in cold wea
ther:
•
Glow plugs (if equipped)
•
Engine coolant heaters, which may be an OEM
option
•
Fuel heaters, which may be an OEM option
•
Fuel line
insulation, which may be an OEM option
There are three major differences between Group
1 fuels an
d Group 2 fuels. Group 1 fuels have the
followingdifferentcharacteristicstoGroup2fuels.
•
Alowercl
oud point
•
A lower pour point
•
A lower energy p
er unit volume of fuel
Note: Group 3 fuels reduce the life of the engine. The
useofGroup3f
uels is not covered by the Perkins
warranty.
Group3fuelsi
nclude Low Temperature Fuels and
Aviation Kerosene Fuels.
Special fuels
include Biofuel.
The cloud point is a temperature that allows wax
crystals to f
orm in the fuel. These crystals can cause
the fuel filters to plug.
The pour poin
t is the temperature when diesel fuel
will thicken. The diesel fuel becomes more resistant
to flow through fuel lines, fuel filters,and fuel pumps.
Be aware of these facts when diesel fuel is
purchased. Consider the average ambient air
temperatur
e for the engine’s application. Engines
that are fueled in one climate may not operate well if
the engines are moved to another climate. Problems
can result d
ue to changes in temperature.
Before troubleshooting for low power or for poor
performanc
e in the winter, check the fuel for waxing.
Low temperature fuels may be available for engine
operation
at temperatures below 0 °C (32 °F). These
fuels limit the formation of wax in the fuel at low
temperatures.
For more information on cold weather operation, refer
to the Operation and Maintenance Manual, “Cold
Weather O
peration and Fuel Related Components in
Cold Weather”.
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