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ARMY TM 9-2815-256-24
AIR FORCE TO 38G1-96-2
MARINE CORPS TM 2815-24/5
3-29.3. Testing.
3-29.3.1 General.
Warning
The nozzle tip should always be directed away from operator. Fuel from spray orifices can penetrate
clothing and skin causing serious personal injury. Enclosing nozzle in a transparent cover is
recommended.
Warning
Before applying pressure to nozzle tester, be sure that all connections are tight, and that fittings are
not damaged. Fluid escaping from a very small hole can be almost invisible. Use a piece of
cardboard or wood, rather than hands, to search for suspected leaks.
Warning
If injured by escaping fluid, see a doctor immediately. Any fluid injected into skin must be surgically
removed within a few hours or gangrene can result.
a.
Connect injection nozzle to a nozzle tester.
b.
Position tip of nozzle below top of beaker and back out 30 degrees from vertical. This is necessary to contain
all spray in beaker, as nozzle spray pattern is at an angle to nozzle centerline. Leave connections slightly
loose.
c.
Pump tester handle for five 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.
CAUTION
Make sure that nozzle tester is in-good condition and that gage works properly.
d.
Isolate test pump gage by closing valve and flush nozzle by operating test pump rapidly.
3-29. 3. 2 Opening Pressure Test.
NOTE
Actual opening pressure is less important than equal opening pressure of all nozzles. Maximum
opening pressure difference between cylinders is 100 psi (700 kPa).
a.
Actuate nozzle tester rapidly several times to allow valve to seat rapidly.
3-134
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