-----Original Message-----
From:
elec-trak-bounces cosmos phy tufts edu[mailto:
elec-trak-bounces cosmos phy tufts edu]
On Behalf Of Jim Coate
Sent: Monday, September 27, 2010 7:23 AM
To:
elec-trak cosmos phy tufts eduSubject:
Re: (ET) Tractor repair: motor on deck is overheating.wheel
horse
C-185
DAC8851 aol com wrote:
> Hello
I have a wheelhorse c-185.The motor on the deck is
overheating
> and the thermo switch turns it off. The housing is
hotter than the other
> motor. I have 2 motors doing this. It is
the 4 1/2 dia motor. I tried
> pulling the blade adapter off the motor
shaft but it is stuck. I am
> soaking this with wd 40. I hope this
just pulls off. or is there a trick
> getting it off? I was pulling
hard with a puller but it would not move.
> I will try again later. I
do not have a lot of time to work on this so
> it will be a slow
process. When I open the motor up what should I be
> looking for?
Will the brushes or bearing cause this?
Dave
>
Bearings are the most likely cause, and the easiest fix.
But of course
any repair requires getting the blade adapter off. You need
to use a
3-jaw puller or a 2-jaw puller with a bearing splitter or a
press. It is
imperative to pull on the bottom edge of the adapter (edge
nearest the
motor housing) and not on the flange - the flange will just
bend and/or
break off. When using a puller, first put the blade screw
back in the
threaded hole in the motor shaft. You don't want the forcing
screw of
the puller to damage the threads inside the motor
shaft.
Ideally just a little pulling will get it done. However...
soaking 24
hours ahead with penetrating oil is good. Heating the adapter
body with
a small torch may help - the trick is to heat the body quickly
so it
expands a little before the motor shaft inside starts to get hot
and
also expand. If you have the puller all set up with some
pressure
applied then heat, it may 'pop' when it breaks free. Heat
cycle(s) may
cook the grease in the lower bearing, but... you need to
replace the
bearings anyways.
I'll send you info on replacement
bearings & brushes etc off-line.
--
Jim Coate
Waynesboro,
VA
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