[Milsurplus] dynamotor repair

[J Forster]

You might also check that there are not two set screws, one on top of
the other. Uncommon, but possible. There also might be Glyptal locking
the holder in place.

I'd avoid trying oil unless you are sure you can remove it completely,
as oil sometimes damages plastic in the long term.

Heating it will likely make matters worse because Bakelite expands more
than aluminum or steel. You might try freezing it though.

Good luck,
-John

==============

WA5CAB at cs.com wrote:

> Make sure that there isn't a second set screw.  Often, there are two.
> If that isn't the problem and gentle prying doesn't break it loose,
> you may have to disconnect the leads to the brush holder and remove
> the casting in order to safely put enough force to break the holder
> loose.
>
> In a message dated 6/29/2008 9:17:25 AM Central Daylight Time,
> robandpj at earthlink.net writes:
>
>> I've got a dynamotor with a brush that bottoms out, which is to say
>> that the spring compresses completely and the brush tightens against
>> the commutator.  The brush holder is noticeably further into the
>> housing than its mate on the other side.
>>
>> I've loosened the set screw, but the holder is resisting any
>> motion.  What to do?
>
> Robert Downs - Houston
> <http://www.wa5cab.com> (Web Store)
> MVPA 9480
> <wa5cab at cs.com> (Primary email)
> <wa5cab at comcast.net> (Backup email)
>
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