Test Description

Nozzle testing is comprised of the following checks:
- Nozzle opening pressure
- Leakage
- Chatter
- Spray pattern

Each test should be considered independent of the others (for example, when checking opening pressure, do not check for leakage).

If all of the tests are satisfied, the nozzle holder assembly can be re-used. If any one of the tests is not satisfied, the complete nozzle holder assembly must be replaced. The nozzle holder will then be checked and repaired at a centralized location.

When performing the injection nozzle tests, refer to the instructions provided with the nozzle test J 29075-B.
- Test Lines - 6x2x400 mm (1.5 mm bore)
- Test Fluid - per ISO 413 (Example: Shell V 1399, Viscosity 1487C or equivalent)
- Kinetic Viscosity at 40° - per ISO 3104: 2.45 - 2.75 mm /second
- Test oil temperature during test: 20 - 25°C (68 - 77°F)

1. Connect the nozzle holder assembly to the test line
2. Place clear plastic tubes on overflow connections to prevent leak off from being confused with actual leak
3. Close the shutoff valve to the pressure gage

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.

4. Fill and flush the nozzle holder assembly with test oil by activating the lever briskly and repeatedly. This will apply test oil to all functionally important areas of the nozzle and purge it of air.