TP-6079 3/00 5Section 3 Fuel System
Section 3 Fuel System
Explosive fuel vapors.
Can cause severe injury or death.
Use extreme care when handling,
storing, and using fuels.
WARNING
The fuel system. Explosive fuel vapors can cause severe
injury or death. Vaporized fuels are highly explosive. Use
extreme care when handling and storing fuels. Store fuels in a
well-ventilated area away from spark-producing equipment
and out of the reach of children. Never add fuel to the tank
while the engine is running because spilled fuel may ignite on
contact with hot parts or from sparks. Do not smoke or permit
flames or sparks to occur near sources of spilled fuel or fuel
vapors. Keep the fuel lines and connections tight and in good
condition. Do not replace flexible fuel lines with rigid lines. Use
flexible sections to avoid fuel line breakage caused by
vibration. Do not operate the generator set in the presence of
fuel leaks, fuel accumulation, or sparks. Repair fuel systems
before resuming generator set operation.
Explosive fuel vapors can cause severe injury or death.
Take additional precautions when using the following fuels:
Draining the fuel system. Explosive fuel vapors can
cause severe injury or death. Spilled fuel can cause an
explosion. Use a container to catch fuel when draining the fuel
system. Wipe up spilled fuel after draining the system.
3.1 General
In most installations, both the generator set and the
vehicle’s engine operate from a common fuel tank with a
dual dip tube. The generator set’s dip tube may be
shorter than the vehicle engine’s dip tube. With this
arrangement, fuel may not be available to the generator
set when the fuel supply is low. See Figure 3-1 for a fuel
system schematic.
3.2 Fuel Pump
Electric fuel pumps draw fuel from the fuel tank through
a filter and supply clean fuel at the proper pressure and
quantity to the generator set engine carburetor.
Fuel Pump Test Procedure:
1. Connect the inlet side of the pump to a fuel source.
2. Disconnect the outlet hose from the fuel filter and
place the end in a container to catch the fuel.
3. Disconnect the P9 connector.
4. Connect the positive terminal (70) of the fuel pump
to the positive terminal (+) of a 12-volt battery.
5. Connect the negative terminal (N) of the fuel pump
to the negative terminal (--) of the battery. The
pump should operate and fuel should discharge
from the pump outlet. If the pump does not operate,
replace the pump.
Generator
set fuel
pump
Vehicle’s
engine
3
1
2
1. Dual dip tubes
2. Fuel filter
3. Fuel tank
598641
Figure 3-1 Fuel System Schematic, Typical
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