[GreenKeys] Model 35ASR TD Motor Woes

[Pete Lancashire]

If you suspect the motor, it can be a shorted winding.

Cap goes bad, causes motor to run hot, damages the motors insulation





On Sat, Aug 5, 2017 at 3:27 PM, Justin Scott <tty at impakt.net> wrote:

> Aha... So, I pulled another book off the shelf, which has a different set
> of prints in it...
>
> W-HOGTC-C16 (specific to TWX 35 ASR, which I have) specifically calls out
> capacitor 192019 in figure 1603, and motor 192120 in figure 1605.  These
> are exactly what I have.
>
> So - either the motor got damaged in the extreme heat of the original cap
> failing, or it just runs this hot regardless of what the dataplate on the
> motor says.  Probably the former.  It does seem to run at about 230-235F in
> the hot spots now.  Was it always that way?  I don't know.  Is my
> replacement cap bad?  I'll find out soon enough by testing it.
>
> Thanks for helping, all.
>
> cheers,
> dj
> N7XDJ
>
> Justin Scott(tty) wrote:
> > Indeed, they are- which is why I need to know what Note 13 is supposed
> to say on that WD!
> >
> > I really have no way to know if the cap was original to the machine,
> replaced, replaced correctly, or what.  I just replaced it with the same
> rating as the one that puffed up.  I had noticed that the area above the TD
> unit was warm, but never noticed how warm.  We know these machines can put
> off some heat, and being my first and probably only-ever 35 ASR, I have
> nothing to judge it against.
> >
> > The only other cap I have on hand is a dual unit for my AC Compressor
> and fan, but the fan side is 7.5 MFD, not going to try that.  Grabbing a 4
> MFD on Monday is an option, but that will cost about $15 or so.  A lot to
> spend on a part I'll likely have no other use for, which may or may not
> make it run cooler.
> >
> > cheers,
> > dj
> > N7XDJ
> >
> > Jeffrey Angus(jdangus) wrote:
> > > On 8/5/17 1:16 PM, Justin Scott wrote:
> > > >This is in regards to "C1", the capacitor for the TD motor- -C3 calls
> out
> > > >two
> > > >C1's, one at 3 MFD and another at 4 MFD - seems trivial, I know, but
> > > >considering
> > > >this is a run capacitor for an AC motor, a little difference in
> > > >capacitance can
> > > >result in a lot of heat (but that much difference?  I suspect not!)
> > > Actually, that IS a big difference. Either 25 or 33% depending on which
> > > way you're
> > > going.
> > >
> > > Motor Run capacitor values are critical.
> > >
> > > --
> > > Jeff-1.0
> > > www.foxsmercantile.com
> > >
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