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 TM 55-1905-221-14-2
5-18. FUEL INJECTOR (Continued).
LOCATION/ ITEM
ACTION
REMARKS
TESTING (Cont)
NOTE
A drop or two of fuel at the spray tip is only an indication of the fuel trapped in the spray
tip at the beginning of the test, and is not detrimental as long as the pressure drop
specified (in step lic) is not less than 40 seconds.
12. High Pressure
a. The high pressure
Test
test is necessary to
detect any leaks at
the injector filter
caps, body plugs, nut
seal ring, and
internal lapped
surfaces which did
not appear during
the valve holding
pressure test (step
11). It also indi-
cates whether or not
the plunger and
bushing clearances
are satisfactory.
Wear protective eye goggles when using compressed air to avoid eye injury.
b. Thoroughly dry the
injector with com-
pressed air.
c. Check all fuel con-
If leaks occur,
nections for leaks and
dry injector
tighten if necessary.
again.
5-413
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