bike trainer noise

"Rob" <[email hidden]> wrote in message
news:ebl7c.119580$Up2.112262@pd7tw1no...

Quoted message said:

Hi I just got an used Minoura Team Mag Turbo III
Trainer... How much noise should it make...it sounds like
there is something rubbing on something inside where the
black cover is..it only does this at higher speeds and
goes on for a few seconds then off then back on ( The
noise ) does any part need oil or grease ?

I have a Blackburn mag trainer. Mine was also making noise.
I had read some on-line complaints about people's mag units
self-destructing. I opened mine up and found this: the unit
is very simple, the resistance part was an aluminum disc
that spun between 2 stationary plates that had ceramic
magnets glued on. The gap between the plates was adjustable
to set the resistance level. The aluminum disc was attached
to a spindle with a set screw, and the set screw had
loosened, causing the disc to rub, making the noise. I
tightened the screw, and no more noise (4 years later). The
only other moving parts in mine were the 2 spindle
bearings, which looked to be fairly beefy, standard
cartridge bearings with dust seals. I wouldn't imagine
these would need re-greasing for a very long time since
it's such a clean environment, but it might not be too hard
to open the seals to look.

Rob said:

Hi I just got an used Minoura Team Mag Turbo III
Trainer... How much noise should it make...it sounds like
there is something rubbing on something inside where the
black cover is..it only does this at higher speeds and
goes on for a few seconds then off then back on ( The
noise ) does any part need oil or grease ?

Inside the resistance unit are a series of magnets on flat
steel or plastic plates. (Each magnet looks like two
quarters ) Between the magnets is an aluminum disc which
spins quite rapidly. If a magnet is loose in its mount (
some models are glued in place, some are held by a stamping
in the steel plate) or if the aluminum disc is bent they
will touch .

Either secure a loose magnet or straighten a bent aluminum
disc. Neither is difficult.

The bearing is pretty durable but if it has been stored in a
damp place and rust is noticeable you might grease it . To
do that you'll have to pry up the seal.
--
Andrew Muzi www.yellowjersey.org Open every day since 1
April, 1971