TM 5-2410-241-23-1
0023
FINDING TOP CENTER POSITION FOR NO. 1 AND NO. 6 PISTON CONTINUED
8. Remove valve mechanism cover (WP 0106).
9. To inspect if No.1 piston (Figure 3, Item 2) is at top center position on the compression or exhaust stroke,
proceed to step 10. To inspect if No. 6 piston (Figure 3, Item 2) is at top center position on the compression or
exhaust stroke, proceed to step 12.
10. No. 1 piston (Figure 3, Item 2) is on the compression stroke if inlet and exhaust valves for the No. 1 cylinder
are fully closed and the rocker arms (Figure 3, Item 3) can be moved by hand. If the rocker arms cannot be
moved and the valves are slightly open, the No. 1 piston is on the exhaust stroke.
11. When the actual stroke position is identified, and the other stroke position is needed:
a. Remove the timing pin from the hole in the flywheel.
b. Then turn the flywheel by 360 degrees in the direction of normal engine rotation.
c.
Install the timing pin into the hole in the flywheel. Repeat step 10.
12. No. 6 piston (Figure 3, Item 1) is on the compression stroke if inlet and exhaust valves for the No. 6 cylinder
are fully closed and the rocker arms (Figure 3, Item 3) can be moved by hand. If the rocker arms cannot be
moved and the valves are slightly open, the No. 6 piston is on the exhaust stroke.
13. When the actual stroke position is identified, and the other stroke position is needed:
a. Remove the timing pin from the hole in the flywheel.
b. Then turn the flywheel by 360 degrees in the direction of normal engine rotation.
c.
Install the timing pin into the hole in the flywheel. Repeat step 12.
14. Remove timing pin and timing pin adapter.
15. Install rubber bushing and lower right bolt on ECM (WP 0101).
16. Install plug (Figure 2, Item 6) on flywheel housing (Figure 2, Item 1).
Figure 3. Timing Top Center Position.
0023
END OF TASK
