[RBW] Re: Drive-Train Chirp
Lubed the pulleys and the pivots. Chirp is gone. Thanks! D.G. On Feb 12, 10:20 am, Darin G. dbg...@mac.com wrote: Will address the pulley wheels today and report back! D.G. On Feb 12, 2:31 am, ascpgh asc@gmail.com wrote: I'm going with the pulley wheels. They have to rotate for a brief moment under a lateral load before the chain moves to the selected cog. Wear and/or lack of lube can create the situation for thatchirp. On a group ride last summer a rider had an intermittent suchchirpand disagreed on the pulley wheel, insisting it was deep trouble in his bottom shell. I pulled alongside him on his right and with his permission,squirted his pulley wheels with my water bottle quenching the chirps for the last six or eight miles. ANDY Pittsburgh On Feb 11, 2:32 pm, Darin G. dbg...@mac.com wrote: Here's a puzzler in the spirit of Car Talk for the mechanical gurus on the post. I get a very loudchirp(like a starling) when I shift into the smaller cogs, and a continuous loudchirp(like a flock of starlings) on the second smallest cog . Nochirpon the larger ones or the smallest. I can't replicate it in my repair stand, but it definitely seems to emanate from the smaller cluster. Cleaned and lubed chain to no avail. -- You received this message because you are subscribed to the Google Groups RBW Owners Bunch group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
[RBW] Re: Drive-Train Chirp
Don't you just love it when a great plan comes together? And it only costs 5 minutes? If it comes back soon, the upper (floating) pulley may be shot. I had similar found out the pulley runs on a bushing. The bushing had worn a shoulder on one side, which I think was what chirped. Mine was intermittent, generally only when shifting, and lube fixed it temporarily. I recall replacing it with an XTR or similar pulley that had a real bearing. dougP On Feb 14, 3:28 pm, Darin G. dbg...@mac.com wrote: Lubed the pulleys and the pivots. Chirp is gone. Thanks! D.G. On Feb 12, 10:20 am, Darin G. dbg...@mac.com wrote: Will address the pulley wheels today and report back! D.G. On Feb 12, 2:31 am, ascpgh asc@gmail.com wrote: I'm going with the pulley wheels. They have to rotate for a brief moment under a lateral load before the chain moves to the selected cog. Wear and/or lack of lube can create the situation for thatchirp. On a group ride last summer a rider had an intermittent suchchirpand disagreed on the pulley wheel, insisting it was deep trouble in his bottom shell. I pulled alongside him on his right and with his permission,squirted his pulley wheels with my water bottle quenching the chirps for the last six or eight miles. ANDY Pittsburgh On Feb 11, 2:32 pm, Darin G. dbg...@mac.com wrote: Here's a puzzler in the spirit of Car Talk for the mechanical gurus on the post. I get a very loudchirp(like a starling) when I shift into the smaller cogs, and a continuous loudchirp(like a flock of starlings) on the second smallest cog . Nochirpon the larger ones or the smallest. I can't replicate it in my repair stand, but it definitely seems to emanate from the smaller cluster. Cleaned and lubed chain to no avail.- Hide quoted text - - Show quoted text - -- You received this message because you are subscribed to the Google Groups RBW Owners Bunch group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
[RBW] Re: Drive-Train Chirp
I'm going with the pulley wheels. They have to rotate for a brief moment under a lateral load before the chain moves to the selected cog. Wear and/or lack of lube can create the situation for that chirp. On a group ride last summer a rider had an intermittent such chirp and disagreed on the pulley wheel, insisting it was deep trouble in his bottom shell. I pulled alongside him on his right and with his permission,squirted his pulley wheels with my water bottle quenching the chirps for the last six or eight miles. ANDY Pittsburgh On Feb 11, 2:32 pm, Darin G. dbg...@mac.com wrote: Here's a puzzler in the spirit of Car Talk for the mechanical gurus on the post. I get a very loud chirp (like a starling) when I shift into the smaller cogs, and a continuous loud chirp (like a flock of starlings) on the second smallest cog . No chirp on the larger ones or the smallest. I can't replicate it in my repair stand, but it definitely seems to emanate from the smaller cluster. Cleaned and lubed chain to no avail. -- You received this message because you are subscribed to the Google Groups RBW Owners Bunch group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
[RBW] Re: Drive-Train Chirp
Will address the pulley wheels today and report back! D.G. On Feb 12, 2:31 am, ascpgh asc@gmail.com wrote: I'm going with the pulley wheels. They have to rotate for a brief moment under a lateral load before the chain moves to the selected cog. Wear and/or lack of lube can create the situation for that chirp. On a group ride last summer a rider had an intermittent such chirp and disagreed on the pulley wheel, insisting it was deep trouble in his bottom shell. I pulled alongside him on his right and with his permission,squirted his pulley wheels with my water bottle quenching the chirps for the last six or eight miles. ANDY Pittsburgh On Feb 11, 2:32 pm, Darin G. dbg...@mac.com wrote: Here's a puzzler in the spirit of Car Talk for the mechanical gurus on the post. I get a very loud chirp (like a starling) when I shift into the smaller cogs, and a continuous loud chirp (like a flock of starlings) on the second smallest cog . No chirp on the larger ones or the smallest. I can't replicate it in my repair stand, but it definitely seems to emanate from the smaller cluster. Cleaned and lubed chain to no avail. -- You received this message because you are subscribed to the Google Groups RBW Owners Bunch group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
[RBW] Re: Drive-Train Chirp
I would first make sure there's no bird caught in your derailleur cage... :) Seriously, are your gears indexed? If so, is the chain properly seated (centered) on the cogs when you hear the chirping? Can you micro-adjust the shifter/cable to see if this eliminates it? Also, do any of your cassette/freewheel cogs show excessive wear/deformity? The list of possibilities should be short... Good luck, BB On Feb 11, 2:47 pm, Bruce Herbitter bruce.herbit...@gmail.com wrote: My old style 105 rear der pulleys are worn so that lube doesn't help, especially when it gets cold and damp on night rides. Fortunately, the mail carrier delivered some replacements today On Sat, Feb 11, 2012 at 1:42 PM, Steve Palincsar palin...@his.com wrote: On Sat, 2012-02-11 at 11:32 -0800, Darin G. wrote: Here's a puzzler in the spirit of Car Talk for the mechanical gurus on the post. I get a very loud chirp (like a starling) when I shift into the smaller cogs, and a continuous loud chirp (like a flock of starlings) on the second smallest cog . No chirp on the larger ones or the smallest. I can't replicate it in my repair stand, but it definitely seems to emanate from the smaller cluster. Cleaned and lubed chain to no avail. Most of the chirps when shifting I've heard seem to come from the derailleur pulleys. -- You received this message because you are subscribed to the Google Groups RBW Owners Bunch group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en. -- You received this message because you are subscribed to the Google Groups RBW Owners Bunch group. To post to this group, send email to rbw-owners-bunch@googlegroups.com. To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en.
