Bottom bracket wont go.

Peter Cremasco

John Henderson wrote:
> lemmiwinks.au@gmail.com wrote:
>
>> Oddly, I've never had trouble with crank bolts (or nuts in the
>> case of most cup and cone BB's) coming loose until I changed
>> over to a cartridge type BB. I'm sorry to say that my 8 speed
>> has (slightly) creaky cranks as a result of the bolts coming
>> lose so I've taken to applying a smidge of blue loctite to the
>> bolts. I've not been game to lubricate the taper, perhaps
>> I'll give it a try next time.
>
> Likewise, I might try loctite on the bolt threads next time,
> although I've never had one actually come undone enough for the
> crank to become lose on the crank axle itself.
>
> John
>
I have. Ride a km; tighten nut. Ride a km; tighten nut. Ride a km;
tighten nut. Repeat as necessary. Was a long commute home. Fixed it by
putting spring washer between nut and crank.

TimC

On 2008-03-07, Tomasso (aka Bruce)
was almost, but not quite, entirely unlike tea:
> "John Henderson" <jhenRemoveThis@talk21.com> wrote in message news:63bjicF271kkkU1@mid.individual.net...
>> Likewise, I might try loctite on the bolt threads next time,
>> although I've never had one actually come undone enough for the
>> crank to become lose on the crank axle itself.
>
> With square taper, I'd tighten to spec then lightly (lightly!!!) tap
> the crank to bed it a little more intimately, then tighten again.

The engineers here use the advice, for tightening screws, that may or
may not apply here:

"Tighten it until you strip the threads, then back it off half a turn".

Hope that helps.


--
TimC
"Any sufficiently complicated C or Fortran program contains an ad hoc
informally-specified bug-ridden slow implementation of half of Common
Lisp." -- Greenspun's Tenth Rule of Programming