Hold injector in vertical position (cup
down) and allow plunger to drip a few
drops of test oil into cup.
Insert plunger about 1/2 inch (12.7 mm)
into barrel to be certain plunger is started
Jam coupling with palm of hand to seat
plunger in cup and rotate 90 degrees
while holding plunger firmly against cup
Hold injector with cup up and plunger
should slide out when injector is lifted
If plunger does not slide out, remove
plunger, coat tip with test oil, and repeat
misalignment, loosen cup retainer, rotate
cup 1/4 turn, and retorque. Repeat as
lubricate plunger with test oil. Install
spring on plunger and insert into adapter.
paragraphs a, b, and c above.
Install new screen (12) and clip (11).
Organizational Maintenance manual for
Instructions for the Injector Leakage Tester (See
(1) The following facilities are necessary for
installation of the injector leakage tester:
(a) A clean area with good lighting. An
enclosed fuel systems area is preferred.
When a tightly enclosed room is used,
due to the extreme sensitivity of the air
the ball float will fluctuate slightly during
opening and closing of the door. Other than
not being able to obtain an accurate reading
during actual swinging of the door, such a
room has no adverse effects and is
(b) A work bench of standard height which is not
subject to pounding or other heavy work. The
bench must not have a vise or other shop
equipment which is generally subject to impacts.
(c) An air supply of 80 psi (552 kPa) minimum
pressure. The air line to the injector leakage
tester should not be in a location where
intermittent. pressure drops are caused by
actuation of other shop air equipment.
(2) Mount rubber isolation pads to feet with
(3) Mount feet to panel. When feet-to-panel
capscrews are snug, panel must be installed
in a vertical position to ensure proper
operation of air flowmeter.
(4) Fill air cylinder oiler 1/3 to 1/2 full of injector
test oil. Make sure sealing ring is in place
before tightening bowl retainer.
(5) Fill bubble checker bowl with injector test oil
to oil level marker. To more easily fill bowl
approximately 3/4 full and then drained to
proper level through valve at bottom of