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Campagnolo Gran Sport RD rebuild...

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Campagnolo Gran Sport RD rebuild...

Old 02-22-21, 05:05 PM
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Campagnolo Gran Sport RD rebuild...

The pins on my sixties something Campy Gran Sport rear derailleur is a bit loose in the pins. I have never had to disassemble such a rear derailleur but would like to rebuild it. Does anyone have advice regarding complete disassembly and the replacement of the pins. There is a fair bit of play in the bottom pins. Thanks...

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Old 02-22-21, 05:17 PM
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Jim Merz has posted a lot of info on rebuilding Campy RDs - mostly NRs. He's an active member of the Classic Rendezvous Group.

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Old 02-22-21, 05:31 PM
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I made new pins for a Sport/Gran Sport marriage rear mech, turned them out of a bit of aluminium tent peg.

Here's the turned-head end:

And here's the end I peened:

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Old 02-22-21, 06:28 PM
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I would second Jim Merz. It obviously can be done, I would not try it without a Bridgeport mill and a lathe.
The work Jim has done previously with similar components was to take a Sportsman top sprung upper "knuckle" and graft it onto a Gran Sport.
Making the derailleur Campagnolo could have made but did not.
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