Scott Smith wrote:
Seems I have had two right side pedals fall off after a recent rebuild. Two separate Colnagos but the same scenario--both fell off while under load (up hill climbing, sprint). I put white lithium on both pedals (and everything really) before screwing them onto the crank arms. Any ideas why they would be unscrewing themselves? Am I doing something wrong? The only common denominator between these two bikes and both pedals is myself with a wrench. Yikes, the implications are humbling. I've also lost a bit of thread from the crank arm. Can these be re-tapped?
Scott, here are my suggestions, since you don't define "a bit of thread". First, they can be retapped and then a liner called a helicoil is inserted to restore the original size. The hard part is finding someone who is obsessive about getting the drilling and tapping exactly along the same direction as it was originally - I once had to bend a crank to get rid of the bent pedal axle effect after it was done wrong. (Now I do it myself, when I have it done at all).
But, if it is just "a bit," and if you aren't too strong or too heavy, I'd just ride it. I had great success with this for years after a similar problem. To help the memory (in case of selling it), you might want to mark the crank arm with something that reminds you...
Good luck!
harvey sachs
mcLean va