Just got a 1985 Bridgestone T-700, and it's a beauty. I was reading up on the rear derailleur. I was going to re-grease the rollers, but not sure what I'm getting into. The bolt for the jockey roller is combined with the pivot bolt for the cage. There's an internal spring in this roller/pivot bolt assembly and I'm not sure what will happen if I loosen the hex nut in the middle of the jockey roller (see pic). I've read different things about this roller in other threads, but it's not clear. Can't find any how to guidance on removing it. I'm not that shy in taking things apart to figure things out as I go, but i tend to avoid doing this when things are spring loaded. Any help would be appreciated. Also would love to know what makes this RD a fatally flawed/fragile derailleur, as I have read on this forum. Thanks.
