Opening Pressure

A reliable tester is required to perform test. Use clean test oil. Care must be taken not to damage the gauge with excessive pressure. Connect test line to nozzle holder assembly and tighten fittings.
CAUTION: When testing, DO NOT place hands or arms near nozzle. The high pressure spray from nozzle will penetrate flesh and destroy tissue, and may cause blood poisoning. The tip should always be enclosed in a transparent container to control spray.
Close gauge valve and operate tester handle sharply several times and check for proper nozzle position. Spray should be injected into a clean container.
Open gauge valve and operate tester handle slowly to determine injector opening pressure. Observe gauge reading just before oil is sprayed from tip. A buzzing noise will occur when spray is injected. Minimum opening pressure is 1706 psi (120 kg/cm² ).