Rear derailleur B-tension and cage springs?

[Drew Eckhardt]

I have a 15 year old Campagnolo Racing-T rear derailleur which shares the RD-RE017 and RD-RE008 springs with many of Campagnolo's other derailleurs through the 10 speed era. While replacing my chain I noticed that the cage now rotates to take up slack in slow motion and the B-tension screw doesn't seem to have much effect.

There seem to be a couple of holes the B-tension spring can go into on the B-tension screw mounting plate, which one is correct?

Do they wear out or break? I've replaced lots of right shifter G-springs, a couple of right thumb lever return springs, and one brake return spring over the last 15 years.

[Drew Eckhardt]

I have a 15 year old Campagnolo Racing-T rear derailleur which shares the RD-RE017 and RD-RE008 springs with many of Campagnolo's other derailleurs through the 10 speed era. While replacing my chain I noticed that the cage now rotates to take up slack in slow motion and the B-tension screw doesn't seem to have much effect.

There seem to be a couple of holes the B-tension spring can go into on the B-tension screw mounting plate, which one is correct?

Do they wear out or break? I've replaced lots of right shifter G-springs, a couple of right thumb lever return springs, and one brake return spring over the last 15 years.

It seems that 15 years of grease and dirt turn into glue. The derailleur works great with new grease and no dirt. I figured that before it got sticky the B-tension screw was nearly all the way loose and used the low tension hole; that worked great.