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 200 300 valve lift value (indicated value on the dial 100 400 gauge). 500 0 kgf / cm 2 EQM4049I L Amount of lift 0 Tester pressure EQM4050I 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.
EQM4051I Measuring point for pre-lift Take the indicated value on the dial gauge at a point of primary opening L pressure + approx. 1 0 kgf/cm 2 . NOTE : Amount of lift Locate the point of primary opening pressure + approx. 10kgf/cm 2 while dropping the pressure. 0 EQM4050I Primary opening pressure Tester pressure EQM4052I - 146 - MAINTENANCE OF MAJOR COMPONENTS