Post by Benchdweller on Jan 24, 2017 18:52:57 GMT -8
Thanks for all the comments gents. I've revived a few rusty ones before but this is probably the worst. When it arrived I thought "yeah, no problem" but it soon became apparent that this one was going to be much more than a regular service with some new parts fitted... The main thing was making sure the main plate could be reused as that's the one movement part that can be very hard to find, everything else can be found nos on ebay or some parts harvested from different movements such as a 6309 or 6119. Thankfully I was supplied with a good stash of nos parts which made my job easier and also saved a lot of time.
In the picture with all the parts laid out all the parts below the main spring were scrap and had to be replaced, everything above it is still in use.
I struggled at first but the trick was to try and tighten them before loosening and break the bond between rust and screw. It also soaked in penetrating oil for 24h first and about two of those hours were with the tub in the ultrasonic cleaner. There were only two screws that didn't come out as the heads had dissolved with the rust. One was a dial holding screw which isn't critical to how the movement would eventually perform and the other was one of the train bridge screws. There are three bridge screws so having one of them missing is no big deal.
I don't have a screw extractor and I've never had a need for one, but I'd be lying if I said I wasn't pricing them up on Cousins while the movement was soaking in oil. It wouldn't work on the dial screw though and I'm not sure it would get the remains of the bridge screw out with all the ferrous oxide holding it in place.
In the picture with all the parts laid out all the parts below the main spring were scrap and had to be replaced, everything above it is still in use.
That is just plain awesome. How on earth Dave got all those rusty screws out I struggle to imagine. Did he use a Bergeon screw extractor?
I don't have a screw extractor and I've never had a need for one, but I'd be lying if I said I wasn't pricing them up on Cousins while the movement was soaking in oil. It wouldn't work on the dial screw though and I'm not sure it would get the remains of the bridge screw out with all the ferrous oxide holding it in place.