TM 9-2320-289-34
3-45.
FUEL INJECTOR PUMP CALIBRATION (Con’t).
6.
7.
8.
9.
10.
11.
12.
Repeat step 5 several times to get a definite feel of when rollers first make contact with cam
ring.
Rotate air-timing fixture (26) counterclockwise until cam rollers can be felt making contact with
cam ring, Tighten knurled screw (29).
Remove marking scribe adapter (27) and spring from air-timing fixture (26) and install optical
sight gage (28).
Sight through optical sight gage (28) and check for position of existing timing mark on fuel
injector pump flange (33). If existing mark is not in line with timing line on optical sight gage,
perform steps 10-15. If existing mark is correct, perform steps 13-15.
Remove optical sight gage (28) from air-timing fixture (26). Loosen knurled screw (29) and
remove air-timing fixture.
CAUTION
Drive shaft and pilot area of fuel injector pump must be covered with a
clean rag during step 11. Failure to follow this caution may result in
damage to drive shaft bearings and seals.
File off old timing mark.
Repeat steps 2, 3, and 5 through 7. Tap marking scribe adapter (27) to place a new timing
mark on fuel injector pump flange (33). Remove air-timing fixture (26) and disconnect air
supply from #1 discharge fitting (32).
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