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Fuel injection system
Fuel injection system, bleeding
(19A-08)
If air has entered the fuel injection system it must
be removed before the engine is started.
Air can enter the fuel injection system if:
• The fuel tank is run dry during normal opera-
tion.
• The low pressure fuel lines are loosened.
• Any section of the low pressure system leaks
while in operation.
Carry out the following to bleed the system:
1
Slacken off the bleed screw (A1) located above the
fuel filter, two or three turns.
2
3
Slacken off the connector nuts for the delivery lines
at the injectors (C). Depending on the type of injec-
tors the connector nuts can be located above or be-
side the injectors.
4
Operate the starter motor until air free fuel is forced
out of the delivery line connectors. If a separate
switch is used for the starter motor, ensure that the
switch for the engine electrical system is in the
“ON” position at this moment.
5
Tighten the delivery lines connections.
6
The engine is now ready to be started.
If the engine runs as it should for a short period of
time and then stops or runs unevenly, check if there
is air in the fuel system. If there is air in the fuel
system, there is probably a leak in the low-pressure
side of the system.
Pump the supply pump (B) with the lever until air
free fuel comes out of the bleed screw. Tighten the
bleed screw on the filter. If the supply pump drive
cam is in position for maximum cam lift it is not
possible to pump by hand. In this situation the
crankshaft must be turned one revolution.
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