Ken,
There should only be two washers maximum in your needle pile up ...
The .020 .. if you choose to have one, (on either side of the c-clip
for shimming purposes), and the larger diameter washer that the spring
pushes on, (this is a factory washer and if you say it is .020 too
then I suspect it is). If you put anymore in there, (or a thicker
combination), you are going to restrict/jam the movement of the needle
assembly, (needle, needle collar,c-clip, .020 washer and large
diameter flat washer), against the spring, (as you have already
noticed with your thick washer). You can do that ... but you will need
to shim the screw cap an equal amount.
The purpose of the spring tension is to keep the needle in position
and pushed against the end of the slide. When you align the small tip
on the on the needle collar with the small hole at the end of the
slide you actually bias the direction of the needle protruding from
the slide, (as the collar is not exactly flat). This bias is supposed
to help keep the weight of the slide off of the slide bore, (using the
needle and needle bore as a bearing surface) .... and allowing some of
that weight to ride in the needle bore. If the needles were absolutely
rigid there would be no way to make up for slight mis-alignment and
the slides would easily jam in their bores. This free movement against
the spring allows the needle to move easily in and out of the needle
bore without creating a lot of friction, (especially when you start
getting some air pushing on the top of that slide).
You are going to have to dump the thicker washer as it is responsible
for the loss of movement against the spring. Put real .020 washers,
(or smaller in for needle shimming), and dump the other ... and leave
the factory washer at the end of the pile up where it belongs. If you
want some official Dynojet .020 washers ... send me you address
offline and I will send you four ....... since I temporarily seem to
have a bunch ... (as long as you live in this hemisphere).
campbell
----- Original Message -----
From: Ken Boerman <[EMAIL PROTECTED]>
Subject: Neddle Shims Max/Venture
> I am in the process of shimming the needles on my
> 89 Venture Royal.
>
> The flat washer that sits on top of the needle
> clip, that the little spring sits on is, .020in
> thick. I have moved this washer under the clip
> which should raise the needles .020in.
>
> I then added another washer (found in my washer
> collection) that measures .030in thick and put it
> on top of the clip for the little spring to rest
> on. This keeps the needle pushed down.
>
> What is the purpose of the spring loading on the
> needle that allows it to push up against spring
> pressure slightly??
>
> After shimming the needle I have lost most of
> this ability for the needle to move up and down
> against the spring pressure. Does this Matter???
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