Camshaft
1. See Figure 70. Check camshaft gear (A) for worn,
cracked, chipped, or missing teeth.
2. Check operation of yoke on Mechanical Compression
Release (MCR) mechanism (B).
NOTE: Press yoke to the OPEN position, and then
verify that it returns to the fully CLOSED position when
released.
3. Check camshaft lobes (C) for scratching, scoring, or
excessive wear.
4. Check MAG side bearing journal (D) and PTO side
bearing journal (E) for scratching or scoring.
5. Using an outside micrometer, measure the MAG side
bearing journal and PTO side bearing journal diameters.
Replace the camshaft if either measurement is 0.548
inches (13.93 mm) or less.
70
59
6
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