• 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.
2.
Turn the keyswitch to the
“
RUN
”
position.
3.
The keyswitch will allow the electric priming pump
to operate. Operate the electric priming pump. The
ECM will stop the pump after 2 minutes.
4.
Turn the keyswitch to the
“
OFF
”
position. The fuel
system should now be primed and the engine
should be able to start.
5.
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. The 10 minute wait will also allow static charge
to dissipate from the low-pressure fuel system. 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 Manual, “Fuel Injection
Lines - Install”.
If you inspect the engine in operation, always use the
proper inspection procedure in order to avoid a fluid
penetration hazard. Refer to Operation and
Maintenance Manual, “General hazard Information”.
If the engine will not start, refer to Troubleshooting,
“Engine Cranks but will not Start”.
i07311245
Fuel
System
Primary
Filter
(Water
Separator
Element
-
Replace
Fuel leaked or spilled onto hot surfaces or electri-
cal components can cause a fire. To help prevent
possible injury, turn the start switch off when
changing fuel filters or water separator elements.
Clean up fuel spills immediately.
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.
NOTICE
Ensure that the engine is stopped before any servic-
ing or repair is performed.
Note:
There are two different primary fuel filters
installed on the engine, the off engine primary fuel
filter and the on engine primary fuel filter.
• Off engine primary fuel filter is a spin-on type of
filter
• On engine primary fuel filter is an element type of
filter
M0090743
87
Fuel System Primary Filter (Water Separator) Element - Replace