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TM 5-4320-305-24
3-6.
REPLACE ENGINE ASSEMBLY (Continued)
17
Rotate V-belt pulley (1) counterclockwise until the FB mark (4) is approximately 90 degrees before engine TDC (5).
18
Rotate V-belt pulley (1) clockwise until the FB mark (4) registers with the timing pin on the cover above the pulley.
The crankshaft, gearing, and valves are in position for beginning of fuel delivery. Hold the crankshaft V-belt pulley
in this position until the injection pump is adjusted. Paragraph 3-21 provides instructions for removal of the idler
pulley assembly to allow access for injection pump adjustments.
NOTE
Parts or tools should be protected from dropping into the front
cover using a shop cloth.
19
Loosen hex bolts (1) but do not remove
them from injection pump gear (2) and
hub (3). The drive hubcap can now be
turned without gear movement.
20
Slowly rotate injection pump hub (3)
and shaft clockwise until the injection
pump starts to deliver fuel. If
necessary, rotate injection pump hub
fully counterclockwise, and repeat this
step.
21
Pump high pressure timing device No.
003-0714 until fuel comes out of stub
pipe at 5 to 8 second intervals. When
it does, the injection pump is adjusted
for beginning of fuel delivery.
22
Without changing the position of injection pump gears (2) or hub (3), tighten the hex bolts (1) that secure the
injection pump hub to the injection pump gear.
23
Recheck fuel injection timing and adjust if necessary. To readjust, repeat procedure starting with step 12. If no
adjustment is necessary, fuel injection timing is now correct.
3-32
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