[T3] Fan replacement for a 1967 TYPE 3

[Joe Plowick III]

The "rivet" center section is about 8.25mm long.  The central ring (ring
that holds rubber pieces, fits to crank) was measuring about 8.1mm thick
although it appeared the same as the rubber bushings. Shims seemed to vary
but they were a bit dirty.  One shim was .45-.5mm and the other seemed to
be .55-.6mm.  The rubber bushings appear to be in good shape and the rivets
appear to still have a tight fit.  They are a pretty dense rubber, so they
don't have a lot of give or movement.  The fan section that had the
elongated holes is the only real problem that stands out.  Unless they were
supposed to be like that since they did seem to be pretty uniform.

Joe Plowick

On Sun, Jul 27, 2025 at 4:36 PM Jim Adney <jadney at vwtype3.org> wrote:

> On 27 Jul 2025 at 12:11, Joe Plowick III wrote:
>
> > The center section shows signs of the smaller holes
> > (where the rivets go) elongating causing play.
>
> Is that the piece that fits directly onto the crank? Sounds like a
> failure, where
> the rivets got loose; I wonder if they could have been swaged tighter if
> this
> had been discovered before it was all taken apart.
>
> OTOH, new rivets could be made and pressed into place. How do the rubber
> rings look? Do they show wear on their ID or OD?
>
> > The rivets that hold it together also act as a spacer where it goes
> > through the rubber inserts.
>
> So the rivets have a larger diameter center section which length
> determines
> the compressed thickness of the final assembly.
>
> How long is that center section of the rivet?
>
> How thick is the piece the rubber rings sit in?
>
> I'm guessing that the shims have holes larger than the center section. How
> thick are the shims?
>
> --
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
>
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