Campy 10 drivetrain problems

[shinomaster]

So I had my LBS install a used record 10 RD on my zank, plus a NOS Campagnolo CX crankset, plus a power torque BB. Since then, on a couple of occasions, the chain has jumped between the smallest cog and the dropouts which is very violent and just stops my pedaling. It's a problem. I've never had this problem on this bike in the past. Is it just out of adjustment?
Also my cranks and BB keep getting loose :(

[ultraman6970]

Never seen that to happen, If you can do the job but prefeer to pay, then What I would do is to go personally over all the process of setting up everything, and then tell the guy at the shop what they did wrong.

[zmalwo]

Is your LBS opened yesterday by a 15 yo???? both bb cups and cranks retaining bolt have to be tightened using torque wrench to a specific torque, 35nm for the BB cups and 45 - 60 NM for the retaining bolt. seems like he didn't set the lower limit screw right on your rear derailleur. Many people install Ultra torque BB cups and cranks retaining bolt to hand tight which is unacceptable. I would take your bike back to the LBS ASAP and get it fixed then ask for some compensation for the damage that the jumped chain caused to your frame.

[rwsaunders]

Shino...Power Torque installs a little different than Ultra Torque and your mechanic might not be aware of the difference. The cups are different too. A fellow Paceliner set mine up for me and no issues with the crank and it’s been 2 years since the installation.

https://youtu.be/L1_3smRyk-w

[oldpotatoe]

So I had my LBS install a used record 10 RD on my zank, plus a NOS Campagnolo CX crankset, plus a power torque BB. Since then, on a couple of occasions, the chain has jumped between the smallest cog and the dropouts which is very violent and just stops my pedaling. It's a problem. I've never had this problem on this bike in the past. Is it just out of adjustment?
Also my cranks and BB keep getting loose :(

Geez...limit screw on rear der after a der hanger straight check.
Lotsa grease on spline and bolt and TIGHT, basically tighten till it stops. Grease and maybe Teflon tape on BB cups..TIGhT.. the LBS sounds clueless.

[m4rk540]

Is the RD a mid cage?

[Ronsonic]

When I saw the title of the thread, "Campy 10 drivetrain problems" my first thought was "unpossible."

Anything can break or wear out eventually, but Campy 10s is in a rare category of things that live almost forever.

The limit screw on the R Der is the first thing to check. A photo can't show everything but it sure looks like the cage is aligned with the cog well. Gotta be falling off with a loose limit screw. And since that's questionable, check everything else, too.

No reason for the crank to loosen up either. Proper torque and lubed, clean threads, all it needs.

[shinomaster]

Thanks everyone, I'll swing by the shop tomorrow to have the thing checked out. I've never has this happen before on any of my Campy Ten-Speed bikes and I've had several. . It's a used RD I scored off craig's list but it seemed to be in very good condition.

[CiclistiCliff]

Tweaked cage or bent b pivot bolt can cause that issue.

You took used parts and expect them to work perfectly? Setup is a possibility, but used parts are used parts.

[old fat man]

Tweaked cage or bent b pivot bolt can cause that issue.

You took used parts and expect them to work perfectly? Setup is a possibility, but used parts are used parts.

The fact that crankset and BB were installed incorrectly points to overall ineptitude of LBS. Quite possible the teenager working on that bike is younger than the derailleur itself.

[El Chaba]

When I saw the title of the thread, "Campy 10 drivetrain problems" my first thought was "unpossible."

Anything can break or wear out eventually, but Campy 10s is in a rare category of things that live almost forever.

The limit screw on the R Der is the first thing to check. A photo can't show everything but it sure looks like the cage is aligned with the cog well. Gotta be falling off with a loose limit screw. And since that's questionable, check everything else, too.

No reason for the crank to loosen up either. Proper torque and lubed, clean threads, all it needs.

This. Campagnolo 10 speed is bombproof.

[C40_guy]

When I saw the title of the thread, "Campy 10 drivetrain problems" my first thought was "unpossible."

Anything can break or wear out eventually, but Campy 10s is in a rare category of things that live almost forever.


All of my bikes are Record 10 and square taper. I expect the drive trains to outlast me, figuring that I have another 20+ years of riding to go. :)

[Ken Robb]

Tweaked cage or bent b pivot bolt can cause that issue.

You took used parts and expect them to work perfectly? Setup is a possibility, but used parts are used parts.
To steal a line from an old ad for a used car dealer: we all ride used parts. :)

[chrisroph]

Its out of adjustment. The cups and crank bolt weren't tightened properly. You should of just come over here and let me do the install. Someone missing these basic steps probably also got the chain the wrong length.

[shinomaster]

Tweaked cage or bent b pivot bolt can cause that issue.

You took used parts and expect them to work perfectly? Setup is a possibility, but used parts are used parts.

All my other parts are used and work great. This looked to have minimal wear. The derailleur it replaced was an old beat to hell centaur from 9 years ago which I raced cross with and crashed on, and still worked great.

[jpritchet74]

When I saw the title of the thread, "Campy 10 drivetrain problems" my first thought was "unpossible."


Ya, THIS.

[chrisroph]

John its not the equipment its the install.

[El Chaba]

All of my bikes are Record 10 and square taper. I expect the drive trains to outlast me, figuring that I have another 20+ years of riding to go. :)

This strikes a chord with me. Part of me hates to think about it that way, but it's realistic for me (in my mid-late 50's). I have some older bikes as well, but I have a number of bikes with Record 10 and I have not-and have no plans to- "upgrade" beyond that point.

[shinomaster]

Apparently the limit screw wasn't long enough to properly engage..

[jtbadge]

Apparently the limit screw wasn't long enough to properly engage..

Weird. I bet that would indicate something in the frame out of alignment, probably at least the derailleur hanger.

[Black Dog]

Apparently the limit screw wasn't long enough to properly engage..

This would be a 1st. The lower limit screw would have had to have been too loose to allow the chain to drop. Fully tightened it usually would prevent the chain from even getting on the smallest cog. I think that they said that to cover up their mistake and incompetence.

[oldpotatoe]

Apparently the limit screw wasn't long enough to properly engage..

?? Then cut the spring in half..AFTER checking to make sure the der hanger is straight..yeegads..