Fuel System Description - Toyota 3b Repair Manual

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FU-2
FUEL SYSTEM
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Description
DESCRIPTION
Priming
Pump
Overflow
Pipe
Water
Sedimenter
and Fuel
Filter
FUEL SYSTEM
Fuel is drawn up from the fuel tank through the
sedimenter and
fuel filter
by
the feed pump
built
into the injection pump.
The
fuel drawn up is then sent into the
pump
housing. Fuel compressed in the pump housing
is
distributed to
the
injection nozzles according to the
injection order, and injected at high pressure into
the fuel chamber.
Excess
fuel
in the pump
housing
flows through the
overflow valve and along
the
overflow pipe and returns to the fuel tank.
The
fuel cycle provides both cooling and lubrication
for the pump. The cycling of fuel through the
pump
chamber warms the fuel so that
it
is
prevented
from
becoming wax-like at cold temperatures.
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