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Inspection of pre-lift
a. If the nozzle tester handle is released
with the needle valve engaged in a full lift
condition, the tester pressure drops,
being accompanied by decrease in the
needle valve lift value (indicated value on
the dial gauge).
b. Take the indicated value on the dial
gauge at the point of time when the sec-
ondary spring completes its operation
and the needle valve puts an end to
descent (the position of needle valve lift
value Ò Ó as shown in the above and
right figures) and check that the value is
within the specified limit.
Measuring point for pre-lift
Take the indicated value on the dial gauge
at a point of primary opening pressure
approx. + 1 0 kgf
.
cm
2
.
Note : Locate the point of primary
opening pressure approx. + 10kgf
.
cm
2
while dropping the pressure.
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