Bennett 111103, Operation, Service & Parts Manual

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Bennett T140 Operation, Service, & Parts Manual Operation
11
FLOAT AND AIR SEPARATOR
Before gasoline can be accurately measured by the meter, air and vapors must be eliminated. The Type 140 pumping unit eliminates air and vapor
through the air separator, and float assembly. The float assembly employed is shown in
Figure 9 .
ADJUSTABLE BYPASS VALVE
The pumping unit uses an adjustable bypass valve assembly in order to limit the pumping unit pressure when the motor is running but no fuel is
being dispensed. The adjustable bypass assembly includes the valve spring and guide as well as a cover, adjustment screw, and brass cap. Refer to
Figure 10 .
CONTROL VALVE
The type 140 pumping unit uses a control valve that aids in the elimination of air by producing a backpressure and is used as a check valve for any
fuel above it.
The control valve also contains a pressure relief valve. This valve ports excess hose pressure, which may result from the expansion of fuel in the
hose during hot weather, to the air eliminator chamber. This action prevents hoses from bursting and helps to prevent pumping unit leaks. Refer to
Figure 11 for a breakdown of the control valve.
Figure 9
Figure 10
Figure 11