07.1-010 Function injection system
F. Fuel pump
The increased delivery capacity of the fuel pump ensures that the fuel system is bled automatically. The manual priming pump is no longer required.
Rate of delivery > 150 cm3/30 s, with starter speed > 150/min, in fuel return.
E Suction side
D Delivery side
A choke in the overflow valve on the injection pump is required for bleeding the injection pump.
Overflow valve with choke dia. 1.5 mm (arrow).
The overflow valve prevents that unfiltered fuel reaches the injection pump via the return line if the supply is clogged (e.g. filter).
Choke with overflow valve
a Housing
b Ball
c Spring
d Plunger
e Supply
f Choke orifice dia. 1.5 mm
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