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FD shifter indexing, default barrel setting

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FD shifter indexing, default barrel setting

Old 08-14-08, 07:51 AM
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2wheelchef
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FD shifter indexing, default barrel setting

I've had all kids of problems indexing my FD (Ultegra 3x) basically the barrel will not turn any further and I have guessed the problem is I need to reset the indexing barrel to a stock position. The Park Tool site and the Shimano install (I recently upgraded to all Ultegra up front) both refer to the "Indexing Barrel" as the way to adjust trim. Problem is it has been adjusted (with the original set-up) to the point of no return. I would like to start at the beginning and need the default setting of the barrel? (is it as simple as "un-screw" to a middle position? or is it all the way in?) In other words I will release the cable and turn the barrel, assuming that my guess is correct and it has been turned to it's limit and is not other wise damaged returning to a neutral setting. After returning to stock position, Re clamp and then hopefully I will be able to adjust the indexing and get into the largest ring smoothly.
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Old 08-14-08, 08:08 AM
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cyccommute 
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Originally Posted by 2wheelchef View Post
I've had all kids of problems indexing my FD (Ultegra 3x) basically the barrel will not turn any further and I have guessed the problem is I need to reset the indexing barrel to a stock position. The Park Tool site and the Shimano install (I recently upgraded to all Ultegra up front) both refer to the "Indexing Barrel" as the way to adjust trim. Problem is it has been adjusted (with the original set-up) to the point of no return. I would like to start at the beginning and need the default setting of the barrel? (is it as simple as "un-screw" to a middle position? or is it all the way in?) In other words I will release the cable and turn the barrel, assuming that my guess is correct and it has been turned to it's limit and is not other wise damaged returning to a neutral setting. After returning to stock position, Re clamp and then hopefully I will be able to adjust the indexing and get into the largest ring smoothly.
"Neutral" setting on adjustment barrels doesn't mean all the way in. Better to adjust your cable to the proper tightness and set the adjustment barrel to about 1/3 of the way out. That way you have some adjustment in either direction, which you might need.

A properly set cable should only need 1 or 2 turns over it's life time to adjust for stretch. If you have to adjust the cable tension to where the adjuster is on it's last thread, the cable was too loose to begin with.

It is possible to turn the adjuster out too far and have it fall out of the threads. If yours refuses to turn, I'd suspect that it's too far in. Otherwise what you are doing is correct.
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Old 08-14-08, 08:16 AM
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I set mine so that it's all the way in then I back it out 2-3 full turns. If you're having trouble shifting the front der I'd say go ahead and disconnect the cable, turn the barrel in then back it off, and then adjust the limit screws.

Set the L limit with the cable disconnected and the chain on the small ring and large cog. Adjust the L limit screw so that the chain just clears the inside edge of the cage when turning the crank. Reattach the shift cable and pull it so that it's just tight. Once the cable's reattached, use the shift lever to get the chain on the large ring and shift the cassette to the small cog. If you click the shift lever and the chain can't quite make it up onto the large ring just reach under the downtube and pull the shift cable tight with your hand to bring the chain up. Adjust the H limit screw so that the chain just clears the outside edge of the cage when turning the crank. Continue to pull lightly on the shift cable so that you know that you're really up against the H limit screw. Put the cassette into one of the middle cogs, turn the crank, and try to shift down and back up. At this point you should be able to shift smoothly up and down but if you have trouble turn the cable barrel in to help the der get the chain to the small ring or out to help bring it up. Do this in 1/4 turn intervals until you've got it dialed in and you're ready to ride.

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