I do not have that particular derailleur, but on several of the ones I do have, there are 3 adjustment screws. 2 of them, control lateral movement (from high stop to low stop), the 3rd screw however controls the spring tension on the derailleur cage (which positions the jockey swing arm fore and aft). If swing arm tension is too tight, the derailleur may self-shift, if too loose, it skips. Swing arm tension may change when you move a used RD to a new frame: the chainstay length changes and/or the chainrings/cassette are different sizes than before. So what worked on the old bike doesn't work as well on the new bike. It's good to adjust the derailleur cage tension, if you can, to compensate for differences in drive train length.
Down thread, I saw a suggestion to check the chain for stiff or bent links. Very good advice. I'd also check the chain rings for a dinged tooth. Sometimes you'll find nicks in the teeth. File them smooth. Same for the jockey wheel teeth, check them too. Finally, give the jockey wheel axles a shot of penetrating oil, be sure they are running smoothly. On Thursday, April 11, 2013 11:22:26 AM UTC-5, Doug M wrote: > > Submitted for your consideration: a crunchy drivetrain problem on my new > Hilsen build. I’m experiencing some auto-shifting and cog skipping when > going uphill, pedaling hard or pedaling out of the saddle. I’d > appreciate the group’s suggestions for a solution. > > Frame: 65 AHH, Waterford, 135 spacing, 1 TT, new > > Crank: Sugino XD2 road double 48-34 > > BB: Shimano UN-54, 110 mm > > Shifters: Silvers on bar ends > > RD: Shimano LX, low normal > > Rims: Sun CR-18, 36 hole > > Rear hub: Shimano 105, 130 spacing, a 1.5 mm spacer added to each side > > Cassette: SRAM 8 speed, 11-32 > > Chain: SRAM 7-8 speed, new > > Components not indicated as new have maybe 200 mi. of use on a previous > bike of mine. > > > > Me: 6’3”, PBH 92, 265 lbs. What I’ve tried: Grease on BB cable guide, > tightening rear QR skewer more. No luck so far. > -- 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 rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
