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ARMY TM 9-2815-255-24 AIR FORCE TO 38G1-95-2 MARINE CORPS TM 2815-24/4 CAUTION Do  not  scrape  or  disturb  teflon  coating  on  nozzle  body  above  carbon  stop  seal  groove.    This coating will become discolored during normal operation, but this Is not harmful.  Do not use a motor-driven brush to clean nozzle body. c. After soaking, clean tip with a nylon brush. 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. 3-125


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