[Fot] Short Version: Harmonic Dampener Question

[Tim Hutchisen]

Bob-

It is unlikely that you created an "out of round" condition on the crank 
given the relatively short time frame it ran until discovered. I would think 
that as long as the woodruff key slot in the crank was not damaged too 
badly, that you should be fine using a different balancer. If there is some 
excessive tolerance on the woodruff key fit, then you may need to shim the 
woodruff key or make a date with your machine shop.

If you have a dial indicator, that should verify and out of round condition, 
it could also help in verifying the radial slop in the woodruff key as well.

Hutch

----- Original Message ----- 
From: "Robert Lang" <lang at isis.mit.edu>
To: <fot at autox.team.net>
Sent: Thursday, April 09, 2009 10:11 AM
Subject: [Fot] Short Version: Harmonic Dampener Question


> Hi,
>
> I guess I was too wordy (again) with my question so...
>
> If a harmonic dampener works loose (this is TR6, but the concept probably 
> carries across the range), is it a given that the crank is toast?
>
> In my case the dampener wiggled enough while loose so that it hammered the 
> key for the crank dampener.
>
> Any opinions are welcome.
>
> I'm trying to decide if I buy a fancy dampener whether I'll just wreck 
> that by installing it on a crank that is possibly beyond its service life.
>
> Thanks!
> rml