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TM 9-2815-225-34&P 3-54. FUEL INJECTOR TESTING; TEST NO.  2 THIS TASK COVERS: a.  Setting Up Spray Pattern Tester b.  Spray Pattern Test INITIAL SETUP: APPLICABLE MODELS REFERENCES (TM) All None SPECIAL TOOLS TROUBLESHOOTING REFERENCES Plunger bore plug assembly (15434) ST-668-5012 Table 2-8 TEST EQUIPMENT EQUIPMENT CONDITION Injector test stand (15434) ST-790 Fuel injector test No.  1 performed (para. 3-53). Spray test fixture (15434) ST-668 SPECIAL ENVIRONMENTAL CONDITION MATERIALS/PARTS Work area clean and away from blowing dirt and None dust. PERSONNEL REQUIRED GENERAL SAFETY INSTRUCTIONS Fuel and electrical systems repairman None MOS 63G LOCATION/ITEM ACTION REMARKS a.  Setting Up Spray Pattern Tester 1. Injector assembly (5) a.  Remove plunger (2), injector Store plunger (2), spring retainer spring (4), and spring retainer (3). (3), and injector spring (4) in a safe place. b.  Install on adapter (14). 2. Injector plunger bore of Install plunger bore plug with The correct type of plunger bore injector assembly (5) rubber seal. plug and rubber seal is determined by the type of injector. 3. Knurled plug (13) Install on adapter (14) drain opening. 4. Seat bracket bore (11) Install applicable seat spacer. Use an 18° cup with spacer mark- ing H-18.  Seat spacer is part of spray test fixture. 5. Target ring (12) Place in spray pattern Select correct target ring (12). adapter base (10). Target rings (12) are marked on handle. 6. Injector assembly (5) Place in spray pattern tester (8) and tighten inlet hose connector (7). 7. Holddown bracket (15) Position injector assembly (5) in holddown bracket (15) and secure with knurled plug (13). 8. Spray pattern tester (8) Locate near or on injector test Any source of 22 psi (152 kPa) stand (1). constant fuel pressure will operate spray pattern tester. 3-358


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