TM 5-3825-226-24 TESTING   9N3979   PENCIL-TYPE   FUEL   INJECTION NOZZLES Tools Needed: *5P4150 Nozzle Testing Group. 5P4244 Adapter. 8S2270 Fuel Collector. FT1384 Extension. 8S2245 Cleaning Tool Group. 8S2258 Brass Wire Brush. 8S2250 Nozzle Holding Tool. 8S2252 Carbon Seal Installation Tool. 1F1153 Needle Nose Pliers. 8H8505 Combination Wrench. 8H8502 Combination Wrench. 8S2274 Socket. 8S1589 Socket. 9S5031 Socket. 5P4813 Socket. 5/64" Hex Wrench. 5P4150 NOZZLE TESTING GROUP A.    5P4721  Tube.    B.    5P4146  Gauge,  0  to  1000  psi  (0  to 6900  kPa)  used  to  test  PC  capsule  valves.    C.    2P2324 Gauge,  0  to  5000  psi  (0  to  34  500  kPa)  used  to  test  DI capsule   valves   and   pencil-type   nozzles.      D.      Gauge protector    valve    for    5P4146    Gauge    (B).        E.        Gauge protector  valve  for  2P2324  Gauge  (C).    F.    On-off  valve. G.    Pump  isolator  valve.    H.    5P4720  Fitting.    J.    5P8744 Adapter   for   capsule   nozzles.      K.      5P4244   Adapter   for pencil-type nozzles. EXTRA VALVE L.   Gauge  protector  valve  (must  be  in  open  position  at all times). CAUTION Be    sure    to    use    clean    SAE    J967 Calibration  oil  when  tests  are  made. Dirty test oil will damage components of fuel injection nozzles.  The temperature of the test oil must be 65 to 75°  F  (18  to  24°  C) for good test results. Order    calibration    oil    by    part    number,    in    the quantities   needed,   according   to   the   information   that follows: Kent-Moore Corp. 1501 South Jackson St. Jackson, Ml 49203 Order: J-26400-5 [5 U.S.  gal.  (18.9 liter)] J-26400-15 [15 U.S.  gal.  (56.7 liter)] J-26400-30 [30 U.S.  gal.  (113.5 liter)] J-26400-55 [55 U.S.  gal.  (208.2 liter)] Viscosity Oil Company 3200 South Western Ave. Chicago, IL 60608 Order: Viscor Calibration Fluid 1487C-SAE J-967C Available in 30 U.S.  gal (113.5 liter) or 55 U.S. gal. (208.2 liter) drums. To test a pencil-type fuel injection nozzle, all six steps of the  test  procedure  must  be  completed,  and  the  step sequence must be as follows: I. Return Leakage Test.  (This test is not needed with the 9N3979 Nozzle). II. Valve Opening Pressure Test. III. Flush the Nozzle. IV. Tip Leakage Test. V. Orifice Restriction Test. VI. Cap Leakage Test. NOTE:  Do  all  tests  before  the  nozzle  is  disassembled for  cleaning,  or  before  any  adjustments  are  made  to  a nozzle.    A  test  can  show  that  the  nozzle  must  not  be used again. Nozzle Preparation for Test Before  fuel  injection  nozzle  (1)  can  be  tested,  all loose   carbon   around   the   tip   of   the   nozzle   must   be removed    with    the    8S2258    Brass    Wire    Brush    (M). 2-39