TM 9-2815-225-34&P 3-53. FUEL INJECTOR TESTING; TEST NO.  1 (Contd) LOCATION/ITEM ACTION REMARKS a.  Cup to Plunger Seal Test (Contd) 11. Transfer line (24) Remove from adapter (4). 12. Cylinder actuation valve (21) Release air pressure. 13. Injector assembly (1) Remove from leakage tester (13) and adapter (4). 14. Locating screw (3) Remove from adapter (4). b.  Check Ball Leakage 15. Transfer line (24) Install on inlet port of adapter (4). 16. Adapter (4) Install plug.   This is plug ST-668-14. 17. Pressure regulator (20) Adjust to 80 psi (551 kPa). 18. Cylinder actuation valve (21) Direct air flow to plug. 19. Air flow meter (25) Observe reading.   Maximum reading of 12 units is acceptable.  If reading exceeds 12, rework injector seat.  In some cases, replacing check ball is all that is required. FOLLOW-ON TASK:  Perform fuel injector testing:  Test No.  2 (para. 3-54). 3-356