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390
SERVICING AND MAINTENANCE
P
I
T
E
H
RIMING
F
HE
NGINE
O
F
— D
E
F
UEL
IESEL
NGINE
WARNING!
Do not open the high pressure fuel system with the
engine running. Engine operation causes high fuel
pressure. High pressure fuel spray can cause serious
injury or death.
1.
Add a substantial amount of fuel to the tank, approx-
imately 2 to 5 gal (8 L to 19 L).
2.
Three priming cycles must be completed. Turn
ignition to the RUN position and wait approximately
30 seconds. This will activate the in tank fuel pump.
Turn the ignition switch to the off position, and leave
off for at least 30 seconds. Repeat this procedure
three times before cranking the engine.
3.
Start the engine using the "Normal Starting"
procedure
page 128.
Ú
4.
Once the engine starts, allow the engine to idle for a
minimum of 30 seconds.
CAUTION!
Do not engage the starter motor for more than
15 seconds at a time. Allow two minutes between the
cranking intervals.
NOTE:
The engine may run rough until the air is forced from all
the fuel lines.
R
O
AS
UN
UT
Do not use alcohol or gasoline as a fuel blending agent.
They can be unstable under certain conditions and be
hazardous or explosive when mixed with diesel fuel.
Due to lack of lubricants in alcohol or gasoline, the use
of these fuels can cause damage to the fuel system.
NOTE:
A maximum blend of 5% biodiesel, meeting ASTM spec-
ification D-975 may be used with your Cummins®
diesel engine.
A maximum blend of 20% biodiesel, meeting ASTM
specification D-7467 may be used with your
Cummins® diesel engine.
Use of biodiesel mixture in excess of 20% can nega-
tively impact the fuel filter's ability to separate water
from the fuel, resulting in high pressure fuel system
corrosion or damage.
Ethanol blends are not recommended or approved for
use with your Cummins® diesel engine.
In addition, commercially available fuel additives are
not necessary for the proper operation of your
Cummins® diesel engine.
WARNING!
CAUTION!
I
R
NTERVENTION
EGENERATION
S
— M
P
TRATEGY
ESSAGE
ROCESS
The Cummins® diesel engine meets all Environmental
Protection Agency (EPA) Heavy Duty Diesel Engine
Emissions Standards, resulting in one of the lowest
emitting diesel engines ever produced.
To achieve these emissions standards, your vehicle is
equipped with a state-of-the-art engine and exhaust
system. The engine and exhaust after-treatment system
work together to achieve the EPA Heavy Duty Diesel
Engine Emissions Standards. These systems are
seamlessly integrated into your vehicle and managed by
the Cummins® Powertrain Control Module (PCM). The
PCM manages engine combustion to allow the exhaust
system's catalyst to trap and burn Particulate Matter (PM)
pollutants, with no input or interaction on your part.
If the engine is allowed to idle or the truck is driven on low
engine speed drive cycles for more than two hours, the
system will automatically enter an emissions operating
mode that will increase the engine idle speed to 900 RPM.
While in this mode, which is designed to help maintain the
Diesel Particulate Filter, the engine idle speed will return
to normal when the brake pedal is applied. A small change
in engine tone or a slight change in engine performance
while accelerating may also be noticeable at speeds below
20 mph (32 km/h). This operating mode may last for up to
an hour of idle time, or around 20 minutes of driving time.
F
LOW
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