TM 10-4320-315-24
3-18. MAINTENANCE OF FUEL INJECTION PUMP - (Cont)
Figure 3-14. Timing Marks and Timing Tool
NOTE
• Replacement crankshaft pulleys do not have timing marks Indented on pulley.
• Magnetic tool (003-1189) is an alternate method of marking crankshaft pulley for timing. Be
sure magnetic tool is completely centered all the way around the crankshaft pulley.
(8)
If crankshaft pulley is to be replaced, locate the true Top Dead Center (TDC) and establish timing marks as
follows:
(a)
Install timing tool (3, Figure 3-14) on engine front cover (4). Position pointer so that the pointed end
almost contacts the outside edge of the crankshaft pulley.
(b)
Rotate crankshaft pulley CW until valves on No. 1 cylinder overlap. Then turn pulley CW 360° (one
full turn).
(c)
Rotate crankshaft pulley one-quarter turn CCW.
(d)
Depress exhaust valve down. Then install 6 mm keystock (1, Figure 3-15) between No. 1 exhaust
valve stem (2) face and rocker arm (3).
(e)
Rotate crankshaft pulley (2, Figure 3-14) CW until the piston lightly contacts the open exhaust valve.
Then scribe a mark even with the pointer on the crankshaft pulley (2).
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