TM 5-3895-373-34
C.
TEST - Continued.
3.
BACK LEAKAGE TEST.
a.
With fuel injector mounted on test stand, apply a
pressure of 2204 psi (15 199 kPa) to fuel
injector.
b.
The amount of time for the pressure to fall to
1470 psi (10 133 kPa) should be between 15 to
35 seconds.
c.
If
fuel
injector
fails
back
leakage
test,
disassemble and clean per step B and retest. If
fuel injector fails a second time, discard fuel
injector.
4.
SEAT DRYNESS TEST.
a.
With fuel injector mounted on test stand, apply
pressure to fuel injector until nozzle assembly
opens. Hold a paper towel against nozzle
assembly tip, immediately after fuel spray stops,
for one minute.
b.
Ensure stain on paper towel is not larger than
1/2 in. in diameter after one minute with the
pressure maintained at 147 psi (1013 kPa)
below the setting pressure.
c.
If
fuel
injector
fails
seat
dryness
test
disassemble and clean per step B. If fuel
injector fails a second time, discard fuel injector.
D.
INSTALL.
1.
INSTALL FUEL INJECTOR.
a.
Install spacer (19) and gasket (18) onto fuel
injector (17).
NOTE
Ensure leak-off pipe mounting hole is
facing
away
from
cylinder
head
assembly during installation
of
fuel
injector.
b.
Install washer (20) onto end of fuel injector (17)
and install fuel injector into injector port (21).
c.
Install clamp (16) and bolts (15). Evenly tighten
bolts to 168 lb-in (19 N•m).
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