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
