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VENT
If truck is not equipped with a fast fueling system, the
fuel tank is vented through a small mesh type filter
installed in a port on the top of the tank (5, Figure 4-1).
This filter should be cleaned periodically and can be
blown out with solvent and reused. The area around
the vent must be free of caked mud and debris that
would cover the vent and prevent proper fuel suction
and return.
If truck is equipped with a fast fueling system, refer to
Section "M", Options and Accessories, for information
on various quick fill systems and servicing of the Tank
Vent Valve.
B04015
FUEL GAUGE SENDER
A fuel gauge sending unit (9, Figure 4-1) mounted on
the side of the tank provides an electrical signal to
operate the fuel gauge on the instrument panel.
Removal
1. Drain fuel below level of gauge sender.
2. Disconnect wire from terminal.
3. Loosen the small screws holding the fuel gauge
sender unit and carefully remove.
Installation
1. Install new gasket.
2. Reinstall the sender unit in tank. Take care to
insure that float is oriented properly and works
freely in vertical plane during installation.
3. Reinstall four socket head capscrews and tighten
to standard torque. Reconnect wire to terminal.
4. Refill tank and check for leaks.
Fuel Tank
B4-3
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Troubleshooting
