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Well, the die is cast. I finally decided that the correct way to figure out problems with a 1920's locomotive is to attack the problem like a 1920's mechanic. So i got out the trianglar file and took a series of swipes at the pin, all up and down its length. . . . Standard blacksmith operating procedure in the early 20th for testing if and how much something has been hardened. (depth of filecut after x swipes is proportional to the hardness at that point. . . . no mark = way hard. try a file on the back of a pocket knife sometime to see what i mean.) The pin appears to have been *mildly* case-hardened, but the hardening on the ends was worn almost completely away-- hence the taper. On that basis, I went after the pin with carbide tooling and cut the ends back to being straight. Then I took a gander at what Machinery's Handbook had to say about low-speed shafitng and made some bushings based on those guidelines. . . I may provide some grease fittings and make it part of the hostling routine to put a grease gun on them before each run day-- one more small chore for the guy <me, probably> that climbs under every weekend. Ah, the glory. <G> These engines live a pretty pampered life under our care, so I don't think I'm going to try re-hardening the pin. If it wears, maybe i'll try making another from some modern material and harden that. I'll post back late in the year after we've run her a bit and tell how everything turns out. Thanks for your comments, everyone!
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