Bicycle Mechanics - Jockey Wheel Squeak
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12-08-03, 06:51 PM
While out riding today I heard an on-and-off squeaking from down in the drive train of my road bike. It was a sound I never heard before. It was only when in the middle and smallest chain rings. When I got home, I found the squeaking to be coming form one of the jockey wheels (pulleys), not sure which one. I took of the chain and cleaned the whole drive train throroughly and then relubed, but the squeak is still there. Any ideas as to what's causing this and what I should do to fix it?
I've been caught in about 3 heavy downpours in the last few weeks and the roads around here are very gritty at the moment. So those are the conditions under which this sqeak developed. BTW, these are comparatively new Ultegra jocky wheels--I changed them about 3,000 miles ago.
Try removing the jockey pulleys from the derailleur (you'll need to remove the chain) and clean them completely. There is probably a metal bushing that the jockey pulley rotates around. (i'm familiar with Campy derailleurs). Remove the bushing and clean both the bushing and the pulleys. I use a light teflon lubricant on the bushing so as not to attract a lot of road grime. When reassembling the derailleur make sure the jockey pulleys are correct vertically (one is for the top, the other for the bottom). The direction of rotation should be noted on the pulleys themselves.
12-08-03, 09:02 PM
I just had the same problem with my 105 rear derailluer. The jockey pully, the one one the top near the cassette, is a floating pulley. It has a floating bearing that allows for smooth index shifting. You need to disassemble it, you don't need to remove the chain, and apply a thin coat of grease to the bearings. Silence should ensue.
12-09-03, 02:57 AM
Just shoot some silicone spray into the pulleys, at the edge of covers/bushings on the sides of the pulleys. I used to take 'em apart and oil or grease them. I use silicone now because it's easier, it works just as well or better and best of all- it does not attract dirt!!!
I use it on the brake and derailleur pivots as well.
It's easily found at most auto parts stores/departments
It's the top pulley with the ceramic bearing, I find a permanent fix is a small dab of pro-gold lube, don't use too much and wipe off the excess because the grease becomes a dirt magnet and makes the bearing a grinding wheel.
12-09-03, 09:31 PM
Hey, thanks everyone for your advice. The job is done and the squeak is gone. I cleaned and lubed both jockey wheels. (BTW, it was not necessary to remove the chain, but with the power link that is no big deal anyway). I am still not sure which wheel it was. However, my bet is on the lower one with the metal bushings. All the rain that it was exposed to seems have caused some rusting which I cleaned up with Liquid Wrench. It was great hearing my bike humming quietly again.
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