TP-7070 7/18 79Section 3 Scheduled Maintenance
3.5.3 Bleeding Air from Fuel System
Trapped air in the fuel system causes difficult starting
and/or erratic engine operation. The fuel system uses
an automatic bleed line which allows fuel and air to flow
back to the tank. To bleed the fuel line, crank the engine
and allow the fuel to circulate through the system for
approximately 5 minutes. After an initial rough start, the
fuel line should be bled.
3.5.4 Restriction Gauge (if equipped)
The fuel/water restriction gauge mounts to the fuel water
separator head in the vent plug port. This gauge helps
determine the filter element change interval for the
fuel/water separator and allows visual monitoring of the
filter condition.
The restriction gauge monitors fuel flow and
continuously displays restriction readings indicated as
vacuum. Increased restriction indicates a clogged
fuel/water separator element.
As the filter gets dirty, a yellow plunger moves toward the
red service area on the indicator. To reset the indicator,
simply press the button on the top. See Figure 3-3.
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1. Reset button
2. Restriction gauge
Figure 3-3 Restriction gauge
To install the restriction gauge, use the following
instructions.
1. Read and follow the safety precautions at the
beginning of the section.
2. Before working on the generator set or connected
equipment, remove the generator set from service.
Refer to the safety precautions for preventing
accidental starts and disabling the generator set.
a. Remove the load from the generator set.
b. Shut down the generator set.
c. Place the generator set controller into
Out-of-Service mode and press the
emergency stop button.
d. Disconnect the power to the battery charger.
e. Remove the battery cables negative (--) lead
first to disable the generator set.
3. If a fuel shut-off valve is present, close the fuel
shut-off valve at the nearest point to the fuel/water
separator inlet or at the fuel tank.
4. Coat the the threads and O-ring with motor oil
before installation.
Note: Do not use thread tapes. Loose particles
could work their way into the fuel system.
5. Thread the restriction gauge into the vent plug port
on the fuel/water separator. See Figure 3-4. Use a
16 mm wrench to install or remove the restriction
gauge (do not tighten by hand).
6. Open the fuel shut-off valve when the installation is
complete.
1. Manual primer pump
2. Vent plug
10501000200
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Figure 3-4 Vent Plug Port
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