Stoker, Gil, Maxwell
First, thank you for the responses and suggestions.
Second, unfortunately I was not clear in my description of the problem. I changed my message and underlined the changed context. That first sentence describing the problem should have read:
The 4150 on the other hand turns over fine by hand, no binding. However when air is applied it will not turnover and run. ( the underlined is a clarification edit).
Then the rest of the description of how it locks up will make more sense.
Bob