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 TM 55-1905-221-14-2
5-18. FUEL INJECTOR (Continued).
LOCATION/ ITEM
ACTION
REMARKS
TESTING (Cont)
2. Open the test
fixture fuel valve
and operate the
pump handle to
maintain the
testing pressure
of 450 pounds per
square inch (3,103
kpa).
3. Observe for leaks
If this occurs,
at the injector rack
a poor bushing-
opening.
to-body fit is
indicated.
4. A leak around the
spray tip or seal
ring usually is
caused by a loose
injector nut,
damaged seal ring,
or a hardened
surface on the
injector nut or
spray tip.
5. A leak at filter
cap indicates a
loose filter
cap or damaged
filter cap gasket.
6. A "dribble" at the
Leakage at tip
spray tip orifices
will cause
indicates a leaky
pre-ignition in
valve assembly due
the engine.
to damaged surface
or dirt.
5-412
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