Sunday, September 25, 2011

More work on the Type C 767...

After getting about as far as I could otherwise, the time came to get the rear housing broken down on the Type C. I was sort of dreading it, because it is assembled in a different way than the previous HB's I've worked on. The reason for this is that the those half moon shaped contacts for the speed controls? They're not only screwed onto the insulated posts, but soldered onto the wires coming off the field coils as well. In all the other type A's,  a screw terminal is soldered onto each wire from the field coils, and the screw that holds the contact onto the insulated post simply secured the terminal with it.

Here's why this is a pain: In order to take the field coils/stator ring out, you have to unscrew the contacts, and carefully remove them from the insulated posts. However, you have to get the field coil assembly partially out to expose the screws enough to actually be able to get the contacts out, and the wires are pretty short. The other consideration is not moving the wires attached to the contacts too much, in the quite possible event that after 90+ years of being in the same orientation, and buzzing about, that they wouldn't simply crack or break off.

So, once that was done, and all was seemed to be well, it was time to take a couple pictures of the greasy, carbon encrusted goodness, and then start washing almost a century's worth of oil residue and motor brush remains away. The before pictures are included, the after pictures will come with the next update. (I've already done the work, just need to post it.)

Aside from the further breakdown, there has been more and more polishing of the front half of the housing parts, and despite the fact it is difficult to see in pictures, slowly removing the fine scratches and abrasive wheel marks has happened.




















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