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TM 55-1905-221-14-4
6-31. FUEL INJECTORS (Continued).
The injector must always be in proper position in relation to the spray deflector
before it is tested, in order to prevent the fuel spray from penetrating the skin.
Fuel entering a person's blood stream may cause serious infection.
(2) Connect the fuel injector
to fuel line by rotating
inlet clamp handle to move
fuel inlet socket against
the fuel injector inlet
filler cap. Purge injector
of air by stroking the
operating handle until
clear fuel flows from the
outlet cap.
(3) Connect the outlet line to
fuel injector by rotating
outlet clamp handle to
seal socket against fuel
injector outlet filter cap.
Operate the tester to build
up slight pressure in
system and stroke the pop-
ping handle two or three
(4) With the injector rack in
FULL FUEL position, operate
handle of test fixture
with smooth even strokes.
Check fixture gage and
record the injector valve
opening (pop) pressure,
indicated when the injector
sprays fuel. The pop
pressure should be 450 to
850 pounds per square inch


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