I am not familiar with these motors and hope this is not too obvious but usually one must remove the brushes first if it is a brushed motor.to avoid fouling on the commutator
Chris S
--- In electricboats@yahoogroups.com, Dave <dasilvor@...> wrote:
>
> Be careful with those motors. If they are built the same way as lynch
> motors, you will need a press to separate the two halves.
> The motor is probably held together by the force of the magnets, and you
> can loose fingers trying to lever it apart.
>
> Dave
>
> David Goldsmith wrote:
> > As long as the motor is shot I figured I'd open it up and see what's inside.
> > I've got all the bolts and cir clips I can see off and the two case halves
> > will rotate about a quarter turn from their mating position. What's the
> > trick to getting it apart?
> >
> > Thanks,
> > David
> >
> > On Fri, Sep 3, 2010 at 11:59 PM, Daniel Michaels <nov32394@...> wrote:
> >
> >
> >> I was thinking maybe a cracked magnet.
> >>
> >> Dan
> >>
> >> --- On *Fri, 9/3/10, dennis wolfe <dwolfe@...>* wrote:
> >>
> >>
> >> From: dennis wolfe <dwolfe@...>
> >> Subject: Re: [Electric Boats] Anyone with technical experience with a Mars
> >> PMAC?
> >> To: electricboats@yahoogroups.com
> >> Date: Friday, September 3, 2010, 8:49 PM
> >>
> >>
> >>
> >>
> >> These are quite difficult to get apart as there are no jack screw holes to
> >> push the two casing halves apart. These are not designed to be repairable.
> >>
> >> If the motor turned freely when you got it but now doesn't you have most
> >> likely damaged the bearings - probably a $100 motor shop job if you can get
> >> the motor apart for them.
> >>
> >>
> >>
> >> ----- Original Message -----
> >> *From:* goldsmithfoil <http://mc/compose?to=suntreader@...>
> >> *To:* electricboats@yahoogroups.com<http://mc/compose?to=electricboats@yahoogroups.com>
> >> *Sent:* Friday, September 03, 2010 9:32 PM
> >> *Subject:* [Electric Boats] Anyone with technical experience with a Mars
> >> PMAC?
> >>
> >>
> >>
> >> I bought a used Mars PMAC. It came with some sort of adapter on the shaft I
> >> didn't need. The set screws were stripped and after two days of trying to
> >> drill them out or just trying to cut through the machined adapter I've had
> >> no luck. The big problem is now the shaft doesn't turn easily. It feels like
> >> its rubbing or otherwise running into other things in there.
> >>
> >> I'm worried this motor is just shot and I should have bought a new one in
> >> the first place, just trying to save a buck, you know?
> >>
> >> There is one electric motor repair place in town. They're not going to know
> >> what this is since it was invented in the last thirty years (its a pretty
> >> decrepit old throw-back of a motor shop) and considering how much they
> >> charged me to put a new capacitor in a motor last year, it would end up
> >> costing as much as a new motor even if they could fix it.
> >>
> >> Any ideas? I don't suppose I could send it back to Mars for a
> >> refurbishment?
> >>
> >> David
> >>
> >>
> >>
> >>
> >>
> >
> >
>
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