TM 10-4320-315-24
3-18. MAINTENANCE OF FUEL INJECTION PUMP - (Cont)
(d)
Rotate front pulley CW until the timing mark (1, Figure 3-14) Is exactly aligned with the reference
pointer of timing tool (3) and the piston for No. 1 cylinder is traveling toward TDC compression
stroke.
(e)
Loosen the three bolts (4, Figure 3-13) that secure injection pump drive gear (7).
(f)
Operate high pressure hand pump (5, Figure 3-16). With socket on nut (16, Figure 3-13), slowly turn
Injection pump shaft CW within the mounting slots of injection pump drive gear (6) until the stream
from the spill pipe turns to droplets. Then tighten the three bolts (4) that secure injection pump drive
gear (6).
(g)
Check timing by turning front pulley one-quarter turn CCW. Start operating high pressure hand
pump while turning front pulley slowly CW until stream from spill pipe turns to droplets.
(h)
Check that the timing mark is aligned with the reference pointer +1 degree. If not aligned, repeat
steps (c) through (g).
Figure 3-16. Setting Injection Pump Timing
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