Fuel System - Prime - Perkins 1104E Operation And Maintenance Manual

SEBU8121
Removal and Installation of the
Fuel Injectors
Work carefully around an engine that is running.
Engine parts that are hot, or parts that are moving,
can cause personal injury.
Make sure that you wear eye protection at all
times during testing. When fuel injection nozzles
are tested, test fluids travel through the orifices
of the nozzle tip with high pressure. Under this
amount of pressure, the test fluid can pierce the
skin and cause serious injury to the operator.
Always keep the tip of the fuel injection nozzle
pointed away from the operator and into the fuel
collector and extension.
NOTICE
If your skin comes into contact with high pressure fuel,
obtain medical assistence immediately.
Operate the engine at a fast idle speed in order to
identify the faulty fuel injector. Individually loosen and
tighten the union nut for the high pressure pipe to
each fuel injector. Do not loosen the union nut more
than half a turn. There will be little effect on the engine
speed when the union nut to the faulty fuel injection
nozzle is loosened. Refer to the Disassembly and
Assembly Manual for more information. Consult your
authorized Perkins dealer or your Perkins distributor
for assistance.

Fuel System - Prime

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 is replaced.
•
A new injection pump is installed.
Use the following procedure in order to remove air
from the fuel system:
1. Remove the cover for the fuel injectors. Refer to
the Disassembly and Assembly Manual.
2. Turn the key switch to the RUN position. Leave the
key switch in the RUN position for three minutes.
3. Turn the key switch to the OFF position.
Illustration 39
Injector nuts
Note: Damage to the fuel injection pump, to the
battery, and to the starter motor can occur if the
starter motor is used excessively to purge the air
from the fuel system.
4. Loosen the flare nuts (1) for the high pressure fuel
lines on all of the fuel injectors.
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.
i02251901
5. Observe the connection at the flare nut. Operate
the starting motor and crank the engine until the
fuel is free of air.
6. Tighten the flare nuts (1) to a torque of 30 N·m
(22 lb ft).
7. The engine is now ready to start. Operate the
engine at low idle for a minimum of five minutes
immediately after air has been removed from the
fuel system.
Note: Running the engine for this period of time will
help ensure that the pump is completely free of air.
Maintenance Section
Fuel System - Prime
g01003929
NOTICE
71