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 TM 55-1905-221-14-4
6-31. FUEL INJECTORS (Continued).
LOCATION/ITEM
ACTION
REMARKS
TESTING (Cont)
d. High pressure test.
(1) The high pressure test
is necessary to detect
any fuel 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 (lb
above). It is also
indicates whether or
not the plunger and
bushing clearances are
satisfactory.
WARNING
Wear protective eye goggles when using compressed air to avoid eye injury.
(2) Thoroughly dry the
injector with compressed
air. Check all fuel
connections for leaks
and tighten if necessary.
If leaks have occurred,
dry the injector
again.
(3) With the injector rack
in FULL FUEL position
and the popping handle
locked in position by
means of a handle lock
as shown stroke pump
operating handle to
build up and maintain
pressure.
6-554
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