Re: (ET) Tractor repair: motor on deck is overheating.wheel horse C-185

["Mike Wallace" <metman glasgow-ky com>]

To add a couple points to Jim's reply:

1. The absolute best three jaw puller for blade clutches is a Model 104 
Posi
Lock (www.posilock.com).  Kinda expensive but far superior to anything from
Harbor Freight or anybody else.  And it also works well for pulling
bearings.

2. I replace the standard 5/16-24 x 1 1/2" long hex head blade bolt with a
socket head screw at least 2" long.  The hex recess acts to contain the
point on the puller's center bolt.

Mike in KY

-----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 edu
Subject: 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
www.FreeRangeElectric.com
www.ElectricTractorStore.com

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