3-10 Scheduled Maintenance TP-5592 7/96
Bleeding Fuel System
If the generator set engine runs out of fuel, if air leaks
develop in the suction side of the fuel system, or when
replacing the fuel filter, bleed the entire system to
prevent starting failures and/or erratic operation.
NOTE
Connect the battery during the priming procedure to
allowenginecranking. Donotallowengine/generatorto
start. To prevent actual starting, toggle the start/stop
switch. (Momentarily place the start/stop switch in the
START position for a few seconds and then place the
switch in the STOP position.)
Use the following procedure to bleed the fuel system.
1. Loosen vent screw A at fuel filter. See Figure 3-7.
2. Toggle the start/stop switch until fuel, free of air
bubbles, flows from vent screw A. Tighten
connection.
3. Loosen vent screw B at fuel filter.
4. Toggle the start/stop switch until fuel, free of air
bubbles, flows from vent screw B. Tighten
connection.
5. Loosen vent screw C at fuel injection pump.
6. Toggle the start/stop switch until fuel, free of air
bubbles, flows from vent screw C. Tighten
connection.
1
2
3
45
TP-5592-3
1. Vent screw A
2. Vent screw B
3. Fuel filter
4. Fuel injection pump
5. Vent screw C
Figure 3-7. Fuel System Bleeding (Typical)
NOTE
Wipe up all spilled diesel fuel after bleeding system.
Wash hands after any contact with fuel oil.
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