I'm having trouble with an early 60's Record rear der. This is first time I've ever worked on one of these so I'm hoping I can get some guidance from the more experienced hands around here.
The problem is the cage is not running parallel to the driveline. It appears to be flared out at quite a drastic angle. This is causing some bad chain rub on the cage, lots of noise, and pretty poor shifting. I would normally go right to a hanger adjustment in this case (and I have not yet borrowed an alignment gauge to check it), But when installing a known good Nuovo Record der it lines up perfectly.
The inner portion of the cage (not shown) looked kind of tweaked and bulged in the center, so I've removed and flattened it. But I do not see how the piece connected to the lower pivot can be altered? The der looked almost new when I got it, but I did remove the lower pivot assy. to clean out the dry grease and re-lube. Is it possible that I re-assembled it wrong and changed the angle? Or is there some other adjustment I can make? As of now the only thing I can think of is to bend the hanger, but again I'm pretty sure that is not the root cause.
Here's a couple of pics, if you sight down the cage to the chainring or crank arm you can see how far off line it is.
Thanks much, Jon Williams
Grants Pass OR USA