Read opening pressure and inspect spray pattern.
Readings should be 2537-2653 psi (175-183 bar) for used nozzle.
should be 2610-2726 psi (180-188 bar) for new nozzle, or new spring in
The jet pattern must be solid without surrounding mist.
Reduce pressure to 362.5-435 pounds (25-30 bar) below specified opening
pressure, check that no fuel dribbles from nozzle.
Adjust injector nozzle opening pressure by adding shims to increase or
removing shims to decrease (paragraph 5.5.7).
Repeat test as required, then remove injection nozzle from nozzle tester.