How do you adjust the injector of nh 220 cummins engine?

To adjust the injector on a Cummins NH 220 engine, start by ensuring the engine is at operating temperature and is turned off. Remove the injector lines and loosen the injector hold-down bolts. Carefully adjust the injector by turning the adjusting screw to the specified clearance, typically around 0.012 inches, and then retighten the hold-down bolts. After adjustments, reattach the injector lines and check for leaks before starting the engine.