Quantcast 3-29.3.  Testing

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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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