[TR] Wiper Motor Brush assembly
tr3driver at ca.rr.com
Sun Oct 7 08:45:49 MDT 2018
The only that thing that matters is how much force it puts on the brushes. And you can adjust that after making the spring.
Make it too long to begin with, then trim to length. If that's too weak, trim another turn. If that's too strong, spread one of the coils a bit.
If what you make the first time won't do, change wire size and do it again. Only takes a minute once you've got the setup.
This is 18th century technology, not rocket science.
On 6 October 2018 18:46:19 GMT-05:00, David Friedlander <forzion7 at gmail.com> wrote:
>Make a spring? So many variables in such an inexpensive part:
>Wire gauge, pitch, overall length, etc....
>On Sat, Oct 6, 2018 at 7:43 PM Randall <tr3driver at ca.rr.com> wrote:
>> I have successfully carved the " ears" from a scrap of PC board.
>> Didn't lose the spring, but I suspect you could make a suitable
>> from the spring inside a retractable ball point pen.
>> Or buy some spring wire and make one from scratch. I've done it in
>> lathe, but you could probably manage with a slow turning drill and a
>> or similar for a mandrel. Its best not to try to hold the wire in
>> fingers, it can cut you pretty badly. So use a scrap if wood or
>> guide the wire as the drill turns.
>> -- Randall
>> On 6 October 2018 15:50:29 GMT-05:00, David Friedlander <
>> forzion7 at gmail.com> wrote:
>>> Hey all;
>>> The wiper motor on my TR3A looked quite sad. I removed it and
>>> proceeded to remover 60 years of crud, outside and in.
>>> In the process of cleaning the parts, I have misplaced the tiny
>>> spring and the two tiny "ears" that hold spring to the two brush
>>> "arms" that rest against the armature. [Moss P/N 554-030]
>>> Unfortunately, these parts are now NLA from any source I know of.
>>> See item number 2 from the Moss illustration, below.
>>> Seems crazy to buy a replacement/salvage motor just to replace
>>> a missing spring and retaining 'ears.' Ideas?
>>> [image: image.png]
>>> Thanks for any help!!
>>> Dave Friedlander
>>> '74 TR6
>>> '59 TR3A
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