Re: New Bottom bracket

On 3/22/2024 9:31 AM, Shadow wrote:

On Fri, 22 Mar 2024 06:47:38 -0400, Catrike Ryder
<Soloman@old.bikers.org> wrote:
 

>
I've been putting off the bottom bracket replacement for about a year
now, but yesterday about 10 miles from my truck I shut off the music
and heard clicking noises when I cranked.  Given that it has over
38000 miles on it, I ordered a new one. I feel a little flutter when I
crank now when I make an effort to concentrate on it. Shame on me for
putting off such a relatively cheap easy repair.

  Last week my back wheel suddenly developed a noticeable rub. I
checked the bearings, and one of them looked as if it had been hit by
a hammer on one side.
The wheel was not loose or tight before the "break". The other
bearings look OK, and the cones are a bit worn, but nothing too bad.
No signs of rust.
  Photo - I put it in a hole so it wouldn't roll. The rest is
perfectly smooth and round.
 <https://postimg.cc/Jsc3YSm2>
  Anyone know what can cause a flattened ball bearing?
The bearings have around 6000Km on them.
  Waiting for a replacement axle/cone/bearings. These things
take time in Brazil.
[]'s

Typical degradation.  The usual path by is some grit in the system. The ball chips and, once damaged, eats itself by adding more hardened jagged swarf. Without that first chip, a set of bearings will eventually look all look satin, not shiny, from abrasion.
Clean the system thoroughly and rebuild with plenty of fresh grease and new balls.
--
Andrew Muzi
am@yellowjersey.org
Open every day since 1 April, 1971