Start over. Remove cable from derailer. Center the barrel adjuster. Check cable for binding. If it's ok, reattach. Pull the cable taut but don't whale on it. If it's still auto-shifting down, turn barrel adjuster 2 or 3 clicks counterclockwise, or until it stops auto-shifting back down.
Conversely, if it's refusing to shift down, turn the barrel adjuster clockwise until it shifts normally. That's what's seemed to have always worked for me. Also check and make sure the cable is in the slot under the BB. I had mine come off recently and it was shifting like crap until I realized what had happened (stupid LBS...). On Thu, Jan 22, 2015 at 5:33 PM, DSat <[email protected]> wrote: > First attempt at replacing my rear derailer cable. Using the same > handlebars, bar end shifters (riv silver), cable housings (in good > condition). Have not touched any limit screws as derailer seems to be lined > up correctly under the smallest gear in back. Chain on smallest cog in back > and on small ring up front. Shifter all the way down when I insert the > cable. I am only pulling the cable by hand when I attach it to the RD > (Deore 9 spd) which has a groove for the cable. Having no luck getting it > to shift correctly. When I am shifting from the smallest to larger cogs, > once I hit about the 3rd smallest cog it automatically shifts back down. If > I go further up it does the same thing. Only when it gets in the biggest > rings does it stay put. I've played with the cable adjust thing on the RD > as well as the one at the cable stop (where downtube shifters would go) in > about as many combinations as I could think of and nothing seems to help. > > Any advice as to what is causing it or would fix it? Do I need to have the > cable pulled tighter than by hand when attaching to the RD? If I push on > the cable about a foot or two up above the bottom bracket cable guide, how > tight should the cable feel (should I be able to push it and hit the frame > or should it be tight, etc???) About at the point to give up and take it to > a bike shop b/c I've spent too many hours for such a seemingly simple task. > Yes, I'm a beginner, but after watching videos, and reading bike repair > books, and even advice from Mark at Riv, I'm still obviously doing something > wrong. > > Thanks In Advance > > -- > You received this message because you are subscribed to the Google Groups > "RBW Owners Bunch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/rbw-owners-bunch. > For more options, visit https://groups.google.com/d/optout. -- Keep the metal side up and the rubber side down! -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
