TM9-2815-202-34 (3)  High  pressure  leak  test WARNING Fuel  injector  may  contain  residual  fuel  oil  and  can  emit  a  high  pressure jet of fuel oil from spray tip when bumped. Always hold injector so that tip will  spray  away  from  skin.  Fuel  oil  which  enters  blood  stream  may  cause serious  infection. (a) Place fuel injector  (37) in  injector test  fixture  (38). WARNING (4) Compressed  air  used  for  cleaning  purposes  will  not  exceed  30  psi.  Use only  with  effective  chip  guarding  and  personal  protective  equipment (goggles/shield,   gloves,   etc). (b) (c) (d) (e) Thoroughly dry injector with compressed air. Check fuel connections for leaks. If leaks have occurred, tighten connections, dry injector, and recheck. With injector rack in FULL FUEL position (fully depressed) and popping handle  (39)  locked  in  downward position, operate pump handle (40) to build  up  and  maintain  pressure. Pump up injector tester and maintain  pressure  of 1600 to 2000 psi. Inspect for leaks at fuel connector gaskets, injector body plugs, and injector nut seal ring. Spray pattern (a)  Place  fuel  injector  (37) in  injector  test (b) (c) (d) Place injector rack in FULL FUEL position (fully depressed). Operate pump handle (40) to build up slight pressure (10 psi minimum) in system. Pop fuel injector several times with popping handle (39). Observe spray pattern emitted from fuel injector spray tip. If spray tip does not produce uniform pattern, dirty or damaged spray tip orifice is indicated. Change 1 4-233