Fuel Related Components In Cold Weather; Fuel Tanks - Perkins 854E-E34TA Operation And Maintenance Manual

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Cold Weather Operation
Fuel and the Effect from Cold Weather
The Water Temperature Regulator and
Insulated Heater Lines
The engine is equipped with a water temperature
regulator. When the engine coolant is below the
correct operating temperature, jacket water circulates
through the engine cylinder block and into the engine
cylinder head. The coolant then returns to the cylinder
block via an internal passage that bypasses the valve
of the coolant temperature regulator. This return
ensures that coolant flows around the engine under
cold operating conditions. The water temperature
regulator begins to open when the engine jacket
water has reached the correct minimum operating
temperature. As the jacket water coolant temperature
rises above the minimum operating temperature, the
water temperature regulator opens further allowing
more coolant through the radiator to dissipate excess
heat.
The progressive opening of the water temperature
regulator operates the progressive closing of the
bypass passage between the cylinder block and
head. This action ensures maximum coolant flow to
the radiator in order to achieve maximum heat
dissipation.
Note: Do not restrict the air flow. Restriction of the air
flow can damage the fuel system. Perkins
discourages the use of all air flow restriction devices
such as radiator shutters. Restriction of the air flow
can result in the following: high exhaust
temperatures, power loss, excessive fan usage and
reduction in fuel economy.
A cab heater is beneficial in very cold weather. The
feed from the engine and the return lines from the cab
should be insulated in order to reduce heat loss to the
outside air.
Recommendation for Crankcase Breather
Protection
Crankcase ventilation gases contain a large quantity
of water vapor. This water vapor can freeze in cold
ambient conditions and can plug or damage the
crankcase ventilation system. If the engine is
operated in temperatures below -15 °C (5 °F),
measures must be taken to prevent freezing and
plugging of the breather system. Insulated hoses and
a heated assembly should be installed.
Consult with your Perkins dealer or your Perkins
distributer for the recommended breather
components for operation from −15° to -40°C
(5 ° to -72.°F).
Fuel and the Effect from Cold
Weather
Note: Only use grades of fuel that are recommended
by Perkins . Refer to this Operation and Maintenance
Manual, "Fluid Recommendations".
The following components provide a means of
minimizing problems in cold weather:
• 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
The cloud point is a temperature that allows wax
crystals to form in the fuel. These crystals can cause
the fuel filters to plug.
The pour point 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
temperature 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 due to changes in temperature.
Before troubleshooting for low power or for poor
performance 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 Operation and Fuel Related Components in
Cold Weather".
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.
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