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Noise at old (70's)Campy Record Rear Derailleur

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Noise at old (70's)Campy Record Rear Derailleur

Old 05-24-05, 06:12 AM
  #1  
Sigurdd50
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Noise at old (70's)Campy Record Rear Derailleur

I'm getting into the Bottecchia project a bit now. Had to rebuild the front wheel and replace one metal toe clip (clip was busted but I happened to have an unused Christophe in my box of parts); the leather straps are still okay. Clean up went well but the decals have taken a beating over the years; lots of stuff taped and screwed over them like bottle cage clamps. Eventually I wax it up. Repacked the back hub and it spins nice.

There are some very interesting points on the bike where the paint is worn right off... like just ahead of the shifter on the down tube... but this looks like it is from the repetitive movement of the hands. Also under the BB. I real think the bike was loved and ridden hard over miles of roads. Don't know if am going to get into touch ups.

I unwrapped the bar tape -- which broke off in brittle strips as I did. I'm going to go with 'unvintage' cushy black cork tape... nicer on the hands. The front fender came off and will replace if I can get replacement struts.

If I have time, I"ll try to take some more shots

Front Der adjusted nicely.

The back is where I'm getting some issue. Some noise from the rear and it seems to be as the chain passes thru the pulley wheels. They look moderately worn. The sound, during pedalling, is a bump-bump... right at the RD. Is this likely just worn pulley wheels? Or could this also be the chain? Should I just go ahead and do both... OR is RD noise a fact of life with this rig and I'm just spoiled with the new stuff on my FELT? (har har)

I don't want to get too carried away and start spending to much $$ replaceing every dang thing
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Old 05-24-05, 07:32 AM
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sounds to me like a stiff link...put it on the rack and run the chain around. The stiff link will make the derailleur move back and forth when it goes through the pulleys. You can grab the chain on either side of the stiff link and flex it (sideways) to free the link, or you can put your chain on the second set of notches on the chain tool and give the stiff pivots a crank or two. Once it flexes okay you need some lube and you're in business, unless it has stretched beyond function (doesn't sound like that is the problem, tho).
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Old 05-24-05, 08:35 AM
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sounds to me like a stiff link...put it on the rack and run the chain around
I'll try those ideas... or maybe I should just take the chain off and soak it in cleaner, and remount, and lube good. I've lubed it up pretty good, but there may be a stiff one after all these years

Still wondering about the pulley wheels... like how worn is TOO worn?
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Old 05-24-05, 08:55 AM
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Originally Posted by Sigurdd50
I'll try those ideas... or maybe I should just take the chain off and soak it in cleaner, and remount, and lube good. I've lubed it up pretty good, but there may be a stiff one after all these years

Still wondering about the pulley wheels... like how worn is TOO worn?
If the chain is staying on the wheels, and they are not missing teeth, you should be okay. I have had problems that sound similar to yours and found that I wasn't getting enough chain wrap. (It definitely could be what Luker said - or possibly both problems). Check to see that the derailleur position is proper, that there is spring tension, and that the chain goes through the derailleur pulleys the right way (I got this wrong once and was quite puzzled until I figured out my mistake).
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Old 05-24-05, 09:32 AM
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If I were you I'd take a few minutes to disassemble & repack the bearings in the jockey wheels. Then you can rule them out as the cause. They probably need it anyway.
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Old 05-24-05, 09:34 AM
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If the chain is staying on the wheels, and they are not missing teeth, you should be okay
the Wheels are not missing teeth, per se. They just look a little worn down but still have some shape... just no right angles left. The chain does not enter the wheels centered. and the teeth don't really dove tail evenly into the chain openings... seems to ride on the side of the openings and on the barrels..
I read about measuring chain length (stretch) so I may check that tonight

I sighted down the der and the pulleys and it seems in alignment (these campy RD's don't have the usual big ass metal mounting plate that the Japanese RD's do... at first I thought the thing was brazed right on the frame!)
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Old 05-26-05, 11:59 PM
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Are you a purist? If so, then hunt for Campy parts. If not, try seal bearing pulleys for Japanese RD. Is the hanger straight? I think it is stiff link too. Does it jump when you ride it. It is a good idea to replace the chain. When the thing breaks, bye bye bridy.

Jeff
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