Fiori DB 460, Руководство по эксплуатации и обслуживанию

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68 SEBU8325-01
Maintenance Section
Fuel System - Prime
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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. Turn the keyswitch to the RUN position. Leave the
keyswitch in the RUN position for 3 minutes. If
a manual purging screw is installed, the purging
screw should be slackened during priming the fuel
system.
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Illustration 36
Injector nuts
2. Crank the engine with the throttle lever in the
CLOSED position until the engine starts.
Note: If necessary, loosen the union nuts (1) on the
fuel injection lines at the connection with the fuel
injector until fuel is evident. Stop cranking the engine.
Tighten the union nuts (1) to a torque of 30 N·m
(22 lb ft).
3. Start the engine and run the engine at idle for 1
minute.
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.
4. Cycle the throttle lever from the low idle position to
the high idle position three times. The cycle time
for the throttle lever is one second to six seconds
for one complete cycle.
Note: In order to purge air from the fuel injection
pump on engines with a fixed throttle, the engine
should be run at full load for 30 seconds. The load
should then be decreased until the engine is at high
idle. The process should be repeated three times.
Repeating the process three times will assist in
removing trapped air from the fuel injection pump.
5. Check for leaks in the fuel system.
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Fuel System Primary Filter
(Water Separator) Element -
Replace
Fuel leaked or spilled onto hot surfaces or elec-
trical components can cause a fire. To help pre-
vent possible injury, turn the start switch off when
changing fuel filters or water separator elements.
Clean up fuel spills immediately.
NOTICE
Do not allow dirt to enter the fuel system. Thoroughly
clean the area around a fuel system component that
will be disconnected. Fit a suitable cover over discon-
nected fuel system component.