Nozzle Leak Test

WARNING: When testing nozzles, do not place your hands or arms near the tip of the nozzle. The high pressure atomized fuel spray from a nozzle has sufficient penetrating power to puncture flesh and destroy tissue and may result in blood poisoning. The nozzle tip should always be enclosed in a receptacle, preferably transparent, to contain the spray.

NOTE: The Injector Nozzle Opening Pressure and Leakage tests should be performed only on nozzles with high mileage, engines that have been over heated or on vehicles that pull heavy loads. False or inaccurate readings can occur if the following tests are not performed to the above criteria.

PROCEDURE
1. Open the shutoff valve at the pressure gauge (1 turn).
2. Blow dry the nozzle tip.
3. Slowly depress the lever of the manual test stand until the gauge reads a pressure of 95 bar (1400 psi).
4. Observe the nozzle tip. A drop may form on the end of the nozzle but should not drop off within a period of 10 seconds.
5. Replace the nozzle assembly if a drop falls during the 10 seconds.