TM 9-2320-289-34
3-36.
FUEL INJECTOR NOZZLE TESTING (Con’t).
b.
PRESSURE TEST
1. Open pressure gagshutoff valve
1/4 turn.
NOTE
Some fuel injector nozzles (3) may
drip during this test. This does not
indicate leakage.
2.
Depress lever of fuel injector nozzle
tester slowly, Note at which pressure
needle of pressure gage stopped.
Minimum
pressure
s h o u l d be
1500 psi (1 0,343 kPa). Replace fuel
injector nozzle (3) if below minimum
pressure,
c. LEAKAGE TEST
1. Open pressure gage shutoff valve an additional 1/2 1 1/2 turns.
WARNING
Compressed air used for drying purposes should never exceed 30 psi
(207 kPa). Use only effective chip guarding and personnel protective
equipment (goggles/shield, gloves, etc.), Failure to follow this warning
may result in serious injury to personnel.
2.
Dry nozzle tip (4) with compressed air.
3.
Depress lever of fuel injector nozzle tester slowly until gage reads 1400 psi (9653 kPa). If a
drop forms at nozzle tip (4) and falls off within 10 seconds, replace fuel injector nozzle (3).
TA50716
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