TM 10-4320-309-14
TM 4320-14/1
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Figure 3-13. Valve Rocker Arm Cover Removal
Check that "T" mark and alignment mark are aligned correctly.
Insert screwdriver into adjusting bolt and loosen locknut.
Turn screwdriver counterclockwise to obtain a clearance. Move valve lever inside for adjustments.
Insert feeler gauge between valve rocker arm and top of the valve spring cotter.
While turning the adjusting screw clockwise, slowly slide the feeler gauge back and forth. Stop turning
adjusting screw when slight resistance is felt on the feeler gauge.
Remove feeler gauge and tighten locknut. Keep screwdriver inserted into adjusting screw to prevent
adjusting screw from turning.
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