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Edco sealed BB - creaking sounds

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Edco sealed BB - creaking sounds

Old 08-08-20, 12:55 PM
  #1  
LeicaLad 
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Edco sealed BB - creaking sounds

So, this is about an Edco Competition sealed bearing unit bottom bracket. Iíd picked this up in trade at the 2018 Westminster bike swap. It came with beat-up BSC thread cups. I had a new-2-me 1971 Gitane Super Corsa frame I was building up as a rider to replace the í71 Gitane SC that got crashed out last year. SO, French threads. See the photo.



Experimenting, I found that the Edco sealed unit seemed to fit snugly onto either OMAS or Stronglight sealed bb cups. The spare Stronglight cups were rather beat, but fully functional, so on they went. Okay. Set-up #1.

The crank just creaked, and it creaked loudly.

First culprit I suspect are the crank arms. Obviously, one or both isnít tight enough and thatís the creaking sound. I repeated wrenched the crank arms tighter and tighter (I may have noticeably spread the Stronglight 104 crank arm sockets in the process). It still creaked.

Oddly, in the meantime, Iíd come up with a used BB with French Edco cups. These cups were also pretty beat, but the axle (under the shield) was an OMAS titanium. But, thatís already in use, and I wanted those Edco cups. Much cleaning and a bit of thread chasing later, and on they go. You will note that the Edco cups have a nylon fitting around the axle access. I was certain that this would probably solve the creaking. Set-up #2. Edco Competition cups w/ Edco Competition sealed unit.

Nope. It didnít. I rode alongside people with each set-up. Both days, everyone agreed: it was noisy. And the cranks are were tightened down soundly.

So. Whatís making these creaking sounds? Can it actually be the Edco sealed unit?

It certainly spins effortlessly in the hand. The bearings feel very clean and smooth.

It does not look especially easy to take apart, and I canít really imagine it would be worth it. . or would it?

I am open to suggestions here.
Thank you
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1959 Hilton Wrigley Connoisseur (my favorite!)
1963 Hetchins Mountain King
1971 Gitane Tour de France (original owner)
* 1971 Gitane Super Corsa (crashed)
* rebuilt as upright cruiser
1971 Gitane Super Corsa #2 (sweet replacement)
1980 Ritchey Road Touring (The Grail Bike)
1982 Tom Ritchey Everest
(replacing stolen 1981 TR Everest custom)
1982 Tom Ritchey McKinley (touring pickup truck)
1985 ALAN Record (Glued & Screwed. A gift.)
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Old 02-06-21, 05:48 PM
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Nwvlvtnr
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I can certainly see the first combination creaking, the EDCO cups look correct could you post a picture of the other side of them? Does your cartridge have the circlips on both side of the axle? Was it a similar sealed unit that came with the EDCO French cups?
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Old 02-08-21, 09:54 AM
  #3  
IsleRide 
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I run an Edco Competition on one of my bikes. While not officially called for (and some advocate against) I put a very thin layer of grease on the inside of the locating cups and on the spindle flats. Chrome plated spindles can feel like they'll never tighten but don't overdo it.
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