TM 10-3930-659-34 4-23.  FUEL INJECTION NOZZLE REPLACEMENT (Con’t). 7. Loosen lift adjusting screw (6) out of pressure adjusting screw (9) one full turn. 8. If  opening  pressure  measured  in  step  3  was  too  low,  turn  pressure  adjusting  screw  (9)  clockwise  to  increase opening pressure.  If opening pressure was too high, turn pressure adjusting screw counterclockwise to decrease opening pressure.  Repeat step 3. 9. Loosen lift adjusting screw (6) out of pressure adjusting screw (9) one-half turn.  Repeat step 3. 10. If opening pressure is still not within specification, repeat step 9. 11. If correct opening pressure cannot be reached after several tries, replace fuel injection nozzle. 12. Hold pressure adjusting screw (9) to keep from turning and torque locknut (7) to 42 lb.-in.  (5 N.m). 13. Hold pressure adjusting screw (9) to keep from turning and torque adjusting nut (8) to 84 lb.-in.  (9 N-m). NOTE If spray pattern is incorrect or fuel injection nozzle leaks or chatters, replace fuel injection nozzle. 14. Test spray pattern of fuel injection nozzle (1) (see TM 9-4910-409-12).  Spray pattern should be finely atomized, even, and cone-shaped without gaps or irregularities. 15. Test leakage of fuel injection nozzle (1) (see TM 9-4910-409-12).  Leakage from return end of fuel injection nozzle must not exceed 3-10 drops in 30 seconds at 1500 psi (10343 kPa). 16. Test chatter of fuel injection nozzle (1) (see TM 9-4910-409-12).  Fuel injection nozzle should  chatter  softly  and consistently.  An occasional miss is acceptable. 4-91