g. CHECKING AND ADJUSTING TIMING MARK

3-45. FUEL INJECTOR PUMP CALIBRATION (Cont) - TM-9-2320-289-34_247

/.25ton/TM-9-2320-289-34 CUCV Series Trucks at intermediate direct support and general support level Manual
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TM 9-2320-289-34 3-45. FUEL INJECTOR PUMP CALIBRATION (Con’t). g. CHECKING AND ADJUSTING TIMING MARK 1. Loosen 2 adjusting screws (31) and set air-timing fixture (26) to 0,25-0,75 degrees, Tighten adjusting screws, 2. Rotate fuel injector pump drive shaft until locating pin (34) is at the 7 o’clock position. 3. Install air-timing fixture (26) on fuel injector pump, ensuring that locating pin (34) engages mating hole (30). Secure air-timing fixture by tightening knurled screw (29) finger tight against fuel injector pump flange (33). NOTE #1 discharge fitting (32) can be identified by a number “1“ cast on fuel injector pump housing. 4. Supply 60-100 psi (414-689 kPa) of dry, filtered air to #1 discharge fitting (32). NOTE The point when cam rollers contact cam ring is point when injection begins at #l discharge fitting (32). 5. Loosen knurled screw (29) and rotate air-timing fixture (26) counterclockwise until cam rollers can be felt making contact with cam ring. Rotate air-timing fixture back to its original position. TA50765 3-172

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