c. If the measured pre-lift value deviates from the specified limit, replace the pin (14, 16), 13 14 15 16 lift piece (13), spacer (15), and nozzle assembly (A) with a new “nozzle service kit”. A EQM4053I Inspection of secondary opening pressure a. After confirming the pre-lift, operate the L nozzle tester and increase the internal pressure up to 350 ~ 450 kgf/cm 2 to fully lift the needle valve. Amount of lift b. Release the nozzle tester handle to +0.05 decrease the tester pressure, then take a note of the movements of the dial gauge. 0 Secondary opening pressure 350~450 kgf/cm 2 Primary opening pressure EQM4054I c.
Take the indicated value on the pressure gauge at the point of time when the needle of the dial gauge indicates the specified needle valve lift value. (In general, pre-lift “ 0 20 40 60 80 M “ + 0.05mm. Refer to following figure.) 0 100 EQM4055I 90 0 200 300 80 10 20 100 400 70 30 60 50 40 0 500 EQM4056I - 147 - MAINTENANCE OF MAJOR COMPONENTS