|Campagnolo 10 speed shifting problems||tifosiboy|
Jun 19, 2003 5:13 AM
|I have a new Campagnolo Chorus 10 speed cassette that I have working with a Daytona 10 speed drivetrain. When I adjust the rear derailleur perfectly for the 4th sprocket as per Campag instructions, the higher cogs from 17-23 do not engage properly and clack and jump. If I then adjust for proper shifting on these higher cogs, then lower ones, 11-15, do not engage properly! This is maddening - any ideas how to get all shifts working properly?|
|Time for new cables?||mhinman|
Jun 19, 2003 5:23 AM
|Try cleaning or replacing your cables. If you have excessive friction in the cables, this will lead to inprecise shifting.|
|had this problem and here is what I did||terry b|
Jun 19, 2003 5:26 AM
|I took everything back to the beginning. Disconnected the RD cable, etc. Followed the Campy instructions very accurately (re-did upper and lower position,) paying very close attention to tautness and the position of the cable as it as it is attached to the RD bolt. Did the 4th cog adjustment and miraculously it worked according to plan. In the end I determined that the first time around the cable was not really seated correctly under the bolt (think I had a bend.) After all the anguish I went through trying to get the gears dialed in with the barrel, I was pretty amazed it worked perfectly. Sometimes it's just best to go back to square one.|
|re: Campagnolo 10 speed shifting problems||Cat 3 boy|
Jun 19, 2003 6:38 AM
|I second what the guy above says, go back to square one.
Just completed 3 years on the same set of campag cables, always ran sweetly,never adjusted a thing all that time. The only reason I'm changing them now is cos I got a new frame, good luck
Jun 19, 2003 1:25 PM
|Perfect adjustment to the 4th cog is really difficult, since all you can do is eyeball it from behind the bike.
When adjusting the cable tension, a failure to shift to successively larger cogs(anywhere on the cassette) means that the cable tension is too low. Screw the barrel adjuster out to increase tension just enough to insure positive shifts to successively larger cogs. With this amount of tension, the shifts to successively smaller cogs should be very quick. Failure to make shifts to smaller cogs at his point means that excessive friction is not permitting the cable to move freely from the force applied by the derailleur spring. Lubing the cables is the first thing to try. If lubrication does not solve the problem, new cables and housing are in order, particularly if they have more than a few thousand miles on them. Don't forget to lube the cable guide under the bottom bracket.
There is also the possibility of derailleur misalignment, but unlikely if the shifting was OK before the cassette change. Actually, a cassette change shouldn't have required more than a quarter turn of the cable adjuster to restore shifting precision. You might try removing the cassette to make sure that the spacers are in the correct order.
|Success - thanks guys||tifosiboy|
Jun 20, 2003 5:22 AM
|Had a look at various suggestions and it looked like cable incorrectly clamped to derailleur and also cable tension too slack. Anyhow all working perfectly now.|
|Note on Campy cassette spacers||B2|
Jun 20, 2003 6:39 AM
|I had my casssette apart the other day and I didn't keep track of which spacer went where. When it came time to put it back together I noticed that they weren't all the same. I intuitively started putting it all back together the way I thought it should go, but stopped before I finished. I figured I better check to make sure I got the right order. Nope - had it wrong.
I'm not sure if it would have gone completely back together with the spacers out of order, but if it would, I'm sure the shifting would suck.