2-6-6-2 pivot pins

[nw-mailing-list at nwhs.org]

I have been reading Tennessee Central Railway, History, Locomotives and Cars by Cliff Downey, TLC 2005.

The TC purchased four 2-6-6-2's from N&W in 1943-44 being N&W 1341, 1385, 1390 and 1396.  The author indicates that TC experienced problems with these locomotives and proffers the problem was due to cracks in the pivot pins that connected the two sets of drivers.  He also indicates that Union Pacific experienced similar problems with 2-6-6-2 locomotives it purchased from N&W during WWII.

Was this a common problem on the Z class?  If so, what was N&W's solution to it? 

Jim Brewer
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