Inspection of pre-lift
a. If the nozzle tester handle is released with
the needle valve engaged in a full lift con-
dition, 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 secondary
spring completes its operation and the
needle valve puts an end to descent (the
position of needle valve lift value “ M ” 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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MAINTENANCE OF MAJOR COMPONENTS
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