User Manual

• Viscosity of the fuel
• Lubricity of the fuel
• Air in the fuel
• Other fuel characteristics
Refer to Operation and Maintenance Manual,
“Fuel Recommendations” for more information on
the cetane number of the fuel.
i04371154
Fuel System - Prime
Contact with high pressure fuel may cause fluid
penetration and burn hazards. High pressure fuel
spray may cause a fire hazard. Failure to follow
these inspection, maintenance and service in-
structions may cause personal injury or death.
Note: Refer to Systems Operation, “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 in order to remove air
from the fuel system:
1. Ensure that the fuel system is in working order.
Check that the fuel supply valve (if equipped) is in
the “ON” position.
Illustration 52 g02882651
Typical example
2. Open the screw (1) on the secondary fuel filter
base.
3. Operate the hand priming pump. Count the
number of operations of the pump. After
approximately 80 depression of the pump stop.
Note: As the fuel system is primed, the pressure will
increase within the fuel system and this increase in
pressure can be felt during priming.
4. Tighten the screw (1) to a torque of 2.5 N·m
(22 lb in).
5. The fuel system should now be primed and the
engine should be able to start.
6. Operate the engine starter and crank the engine.
After the engine has started, operate the engine at
low idle for a minimum of 5 minutes. Ensure that
the fuel system is free from leaks.
Note: Operating the engine for this period will help
ensure that the fuel system is free of air. DO NOT
loosen the high-pressure fuel lines in order to
purge air from the fuel system. This procedure is
not required.
After the engine has stopped, you must wait for 10
minutes in order to allow the fuel pressure to be
purged from the high-pressure fuel lines before any
service or repair is performed on the engine fuel
lines. If necessary, perform minor adjustments.
Repair any leaks from the low-pressure fuel system
and from the cooling, lubrication, or air systems.
Replace any high-pressure fuel line that has leaked.
Refer to Disassembly and Assembly, “Fuel Injection
Lines - Install”.
UENR0623-02 59
Fuel System
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