c. Read opening pressure

TM-10-4320-226-14 Water Pumping Assembly Diesel Engine Driven Wheel Mounted 350 Gallons Per Minute (GPM) 275 Foot Head Models: 350 PAW Manual
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TM 10-4320-226-14 c. Read opening pressure and inspect spray pattern. Readings should be 2537-2653 psi (175-183 bar) for used nozzle. Readings should be 2610-2726 psi (180-188 bar) for new nozzle, or new spring in nozzle. The jet pattern must be solid without surrounding mist. d. Reduce pressure to 362.5-435 pounds (25-30 bar) below specified opening pressure, check that no fuel dribbles from nozzle. e. Adjust injector nozzle opening pressure by adding shims to increase or removing shims to decrease (paragraph 5.5.7). f. Repeat test as required, then remove injection nozzle from nozzle tester. 5-20

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