If you have ridges on either side of where the bearing runs it is worn.
Does the shop manual give a spec for it?
What does it measure now, at the smallest part where the bearing runs? Then what does it measure at the largest part beside where it is worn?

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-