FUEL INJECTOR NOZZLE TESTING.
This task covers:
c. Leakage Test
b, Pressure Test
d. Chatter Test
l Fuel injector nozzle removed.
Calibration fluid (Item 13, Appendix B)
(See paragraph 3-5)
General Safety instructions
l Fuel injector nozzle tester
l DO NOT place hand or arms near tip
of fuel injector nozzles during testing.
l Wear goggles while testing fuel injector
l Compressed air used for drying
purposes should never exceed 30 psi
l DO NOT place hand or arms near nozzle tip (4) of fuel injector nozzle
(3) during testing, Nozzle tip must be enclosed in a receptacle,
preferably transparent, to contain fuel spray. High-pressure atomized
fuel spray from nozzle tip can puncture skin and destroy tissue. Failure
to follow this warning may also result in blood poisoning.
l Wear goggles while testing fuel injector nozzles (3). Failure to follow
this warning may result in serious eye injury.
Ensure that each of the following tests is performed in order listed until a
malfunction is found, A malfunction will only be what is identified in
appropriate subparagraph as a malfunction. DO NOT attempt to identify
malfunctions that are not covered by test that you are performing, even if
there is a symptom that seems to indicate a malfunction.
Connect high-pressure inlet (2) to fuel injector nozzle tester, Connect clear plastic tubes to
fuel return ports (1) to prevent fuel leakoff from being confused with an actual leak. Close
pressure gage shutoff valve.
Fill and purge fuel injector nozzle (3) with calibration fluid.