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CLEANING AND INSPECTION CONTINUED
5. If lifting areas of cam lobes show excessive wear, replace camshaft. Measure camshaft lobe wear with a
micrometer in the following manner:
a. Take a reading with a micrometer across A-C and across B-D (Figure 7). Subtract B-D reading from A-C
reading. This will give lobe lift specification.
b. If camshaft lobe wear limit has been reached, replace camshaft.
Figure 7. Points of Measurement to Determine Camshaft Lobe Wear.
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