Hi Michael, I'm in the process of 'restoring' a later Nuovo Record rear gear.....this one is the later type which has no stamping on the top knuckle, and has the concealed spring...it also has stainless pins which conveniently have hollowed ends so a small punch can be inserted to allow the removal of same pins.
At the moment I have yet to put the gear back together again, but feel confident that it will all go back very nicely.
Regarding the early 'patent' rear gears....these have alloy pivot pins, which I assume would probably come out ok.......but I suspect would be damaged, so new pins might be required?
Incidently, regarding the 'brazed on spring housing stop'.....what I find easier to recognise is the fact that on the 'patent' ones the machined ribbing [or whatever you call it] is spaced wider apart......I have two 'patent' gears which have the less finer ribbing.
And whilst on subtle changes with these gears......has anyone noticed that on most Nuovo Record gears the outer jockey cage has a steel nut inserted for the lower pivot bolt.....but they also made some with the outer jockey cage simply threaded.......I have two such cages....one's on a 'pat 11' concealed spring version.
cheers
Kevin Sayles
Bridgwater Somerset UK
>I just picked up a rear N.R. derailleur with "Patent", no date, stamped on
>top. The cage spring housing stop is brazed to the housing, rather than
>cast in. The piece appears to be fully functional, but the bolts & logo
>plate are scuffed. I'm wondering if it would be worth replacing the
>cosmetically rough part of the parallelogram with a perfect one from a
>later derailleur, or whether there is some sort of value to leaving it as
>is. Also, does anybody have experience driving out the steel pivot pins?
>Before I whale away at the poor innocent thing, I'd love to hear from
>somebody who been successful at removing them. If you've been unsuccessful,
>that might be a lot more interesting to read!
> Michael Shiffer
> EuroMeccanica, Inc.
> 114 Pearl Street
> Mount Vernon, NY 10550
> (914) 668-1300
> euromeccanicany.com