For those who have never worked on a Calfee, they use a self-designed eccentric comprised of two CNC'd aluminum halves that are pulled towards each other and up against the eccentric shell by a pair of through-bolts.
If you want to see a nearly life-size image of the actual eccentric halves & bolts, click on the photo strip below.
Calfees built after March of 2009 (or there abouts) use a somewhat larger version of the eccentric mated with an aluminum sleeve that is bonded into the carbon eccentric shell; again, click on the photo strip below. As noted in
Update #11 of our Calfee Journal, "
[Calfee] implemented a design change to their frames to accommodate a larger diameter eccentric, larger bolts, and an aluminum sleeve bonded to the inside of the .25" larger eccentric shell opening. This change accomplished three things:
- It provided a more solid interface between the eccentric halves and the eccentric shell to eliminate some customer issues with eccentric slippage;
- It moved the fixing bolts further away from the bottom bracket so that they would not be obstructed by the external bearing cups used for cranks like the FSA MegaExo and Truvative GigaPipe models; and,
- It allowed for the use of a Bushnell eccentric -- a preferred spec. for daVinci Design's tandems, remembering Calfee now produces carbon frames for daVinci as well."
As you can tell from the second image in the photo strip above, we opted to use the Bushnell eccentric on our Calfee instead of Calfee's as they've proven to be problem free in over a decade of use 4 of the other tandems we've owned during that period of time. Why switch horses?
So, now that everyone has some background on what we're talking about here, my guess is... and this is just a guess, you need to take your bottom bracket out, remove the two bolts and then use a large drift (a headset removal tool would work well for this) to carefully tap the halves out of the frame. Now, if you have any trepidation about how to do this without getting the eccentric halves wedged-in even tighter, call Calfee and ask for their guidance. Remember, I WON'T warranty your frame if you void Calfee's warranty by buggering up your eccentric.
Once you have them out of the frame take a photo of the two halves and of the eccentric that clearly depicts the extent of any marring caused during your inititial installation and send them to Calfee so they can instruct you on how best to go about carefully removing any displace materials and/or advising if the eccentric halves need to be replaced. As for the aluminum sleeve, again, Calfee will be able to advise how to proceed with refinishing the sleeve such that you only remove any displaced material so that the sleeve will accept the two halves without binding. The tolerances on these parts are intentionally tight and don't lend themselves to being force in or out.