Three Cylinder
• (A) equals 5 mm (0.19685 inch) for the three
cylinder engine
Four Cylinder Turbocharged
• (A) equals 10 mm (0.39370 inch) for the
turbocharged engine.
Four Cylinder Turbocharged
Aftercooled
• (A) equals 8 mm (0.31496 inch) for the
turbocharged aftercooled engine.
i06299308
Fuel System - Prime
Note: Refer to Systems Operation, Testing, and
Adjusting, “Cleanliness of Fuel System
Components” for detailed information on the
standards of cleanliness that must be observed
during ALL work on the fuel system.
Ensure that all adjustments and repairs are
performed by authorized personnel that have had the
correct training.
NOTICE
Do not crank the engine continuously for more than
30 seconds. Allow the starting motor to cool for two
minutes before cranking the engine again.
If air enters the fuel system, the air must be purged
from the fuel system before the engine can be
started. Air can enter the fuel system when the
following events occur:
• The fuel tank is empty or the fuel tank has been
partially drained.
• The low-pressure fuel lines are disconnected.
• A leak exists in the low-pressure fuel system.
• The fuel filter has been replaced.
Use the following procedures to remove air from the
fuel system:
Illustration 60 g03891128
Typical example
1. Ensure that the fuel tank is full and any fuel valve
(if equipped) is in the “ON” position.
2. If the application has a gravity feed fuel system,
then loosen vent screw (1) and allow fuel to flow.
When fuel free from air comes from the vent
screw, tighten the vent screw (1) by hand . If the
fuel system is not a gravity feed fuel system, then
go to Step 3.
Illustration 61 g03891159
Typical example
3. Loosen the vent screw (2) on the secondary fuel
filter. Turn the keyswitch to the “RUN” position.
94
SEBU9075-03
Maintenance Section
Fuel System - Prime
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