Re: Use of MEK to restore idler wheel?
Re. heat shrink, once fitted you could roughen it up with fine sand paper, or perhaps sand it before fitting.
One other method which would work with thick rubber wheels is to machine a good bit of the rubber off in a lathe and then cut a rubber ring out of thick rubber sheet and super glue it on.
Another method if rubber is thick enough would be to machine a groove and then fit an o ring.
The last two methods need a lathe of course.
Anyone local to me (North Essex) I could do it while you wait FOC and you would get a cup of tea into the bargain.!!
Mike.
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