ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
(c) After soaking, clean fuel injection nozzle tip with brass wire brush (ROS16488) or
Insure that nozzle tester is in good condition and that gauge works
properly. Service nozzle tester as recommended in operating instructions
provided with tester.
(3) Connect fuel injection nozzle (6, Figure 4-44) to nozzle tester.
Fuel from spray orifices can penetrate clothing and skin and cause serious
personal injury. Always direct fuel injection nozzle tip away from
personnel. Always enclose fuel injection nozzle in a transparent cover.
Failure to comply could result in serious personal injury.
If diesel or JP fuel is injected into skin, seek medical attention immediately.
Failure to comply can result in serious injury.
(4) Position tip of nozzle below top of beaker and back out 30 degrees from vertical. Leave
connections slightly loose.
(5) Pump handle several strokes to flush air from lines and fittings and to determine pumping rate
required for proper atomization. Tighten all connections securely after all air has been expelled
from nozzle and line.
(6) Perform opening pressure test as indicated below:
Fluid escaping from a very small hole can be almost invisible. Before
applying pressure to nozzle tester, be sure that all connections are tight, and
that fittings are not damaged. Use a piece of cardboard or wood to search
for suspected leaks. Do not use hands to search for suspected leaks. Failure
to comply could result in serious personal injury.
(a) Actuate nozzle tester rapidly several times to allow valve to seat rapidly.
(b) Open gauge valve and raise pressure to a point where gage needle falls rapidly. This is the
nozzle opening pressure. Record nozzle opening pressure.
(c) Opening pressure should be at least 3,330 psi (22,950 kPa) for a used fuel injection nozzle
and 3,660 psi (25,200 kPa) for a new fuel injection nozzle. Replace fuel injection nozzle if
nozzle opening pressure is not within specified range.