TM 10-4320-315-24
3-18. MAINTENANCE OF FUEL INJECTION PUMP - (Cont)
Figure 3-15. Exhaust Valve Depressed with Keystock
(f)
Rotate crankshaft pulley CCW one-quarter turn and remove keystock.
(g)
Rotate crankshaft pulley CW one-half turn and install 6 mm keystock between No. 1 exhaust valve
stem face and rocker arm.
(h)
Rotate crankshaft pulley CCW until the piston again lightly contacts the open exhaust valve. Then
scribe mark even with the pointer on the crankshaft pulley.
(i)
Rotate crankshaft pulley one-quarter turn CW and remove keystock.
(j)
Place a mark exactly in the center of the two marks on the crankshaft pulley. The center mark is the
TDC mark.
(k)
Place injection timing mark at 35° (73 mm) before Top Dead Center (BTDC) on the front pulley. Be
sure to place mark before the TDC mark considering pulley rotation.
NOTE
Determining the true TDC is required only if new crankshaft pulley will be used.
(9)
Remove two of three bolts (4, Figure 3-13) and spacers (5) that secure injection pump drive gear (6) to
injection pump (10).
(10)
Remove three of the four nuts (7) and flat washers (8) from injection pump mounting studs (9).
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