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Garden Tractors and Mowers Vintage lawn and garden tractors, mowers, snow blowers, snowmobiles and other old machinery that is driven by small air cooled engines.

Garden Tractors and Mowers

Ge Electrak, E8M drive motor failed


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  #1  
Old 07-27-2019, 07:37:37 PM
uglyblue66 uglyblue66 is offline
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Default Ge Electrak, E8M drive motor failed

I went to the Boone show today it was a good show but my junk all screwed up! First, I put way to much oil in my gas for my maytags and they would not run.
Then I went to drive my E8M around and made it about 150 feet.I had to stop so a big noisy truck could go by me and then when I hit the go pedal,sparks flew out of the motor,at the oppisite end of the brushes! What would fail on a motor and make sparks on that end? I guess that is where it was coming from,it didn't really happen long enough to fiqure out much looking thru the little slots for the gear shifter.
I just kinda would like to know if I just need to carry it to a rewind shop or if something coulda just tangled up or what.NOTHING happens now but a clic under the dash. Motor does nothing.It was sounding a bit different before Denton .I had put 3 good batteries in it and it ran good but sounded different.
This time it was just buzzing along till Istopped. Then PHIZTS
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Old 07-27-2019, 07:55:18 PM
Vanman Vanman is offline
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Default Re: Ge Electrak, E8M drive motor failed

I think the first thing would be to pull the motor apart and look for the damage. Then go from there based on what you find.

Keith
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Old 07-27-2019, 08:11:51 PM
uglyblue66 uglyblue66 is offline
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Default Re: Ge Electrak, E8M drive motor failed

YEa,that will be soon as in tommorow,i am to tired today,as it is bugging me as to what happened.But I am kinda fishing to find out what I may find!
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Old 07-27-2019, 08:38:34 PM
Vanman Vanman is offline
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Default Re: Ge Electrak, E8M drive motor failed

It's hard to say without really knowing where the sparks came from. Might get lucky and it was a connection adjacent to the motor that let loose and not the motor itself. Probably look for that sort of thing before pulling the motor. Might get lucky.
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Old 07-27-2019, 10:08:04 PM
pegasuspinto pegasuspinto is offline
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Default Re: Ge Electrak, E8M drive motor failed

A good alternator/starter shop should be able to rewind it. The place I go always has some kinda odd winch motor or wiper motor or whatever on the bench.
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Old 07-28-2019, 05:15:34 PM
uglyblue66 uglyblue66 is offline
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Default Re: Ge Electrak, E8M drive motor failed

Well a magnet came loose and jammed the motor. I had to cut the pulley off to get the motor out.I was hoping it was just a bad bearing and the sparks were from the brushes. Wrong.
Brushes are nice, bearings are not even bad,although I would replace them if I am able to find out how to deal with this magnet problem. May not even be a solution other than motor replacement.I have another E8M in the gathering but it is in far worse shape than this machine and I am not sure the motor would not do the same thing.I may have to get it drug out and get started getting the motor out of it.I would rather just repair or replace the bad parts on this machine and not have 1 without parts.

Edit,I just found a used motor on Ebay.May be the best way out for the moment.
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Last edited by uglyblue66; 07-28-2019 at 05:48:04 PM.
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Old 07-28-2019, 08:52:57 PM
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Default Re: Ge Electrak, E8M drive motor failed

Oh! A permanent magnet motor. I wasn't expecting that. When was this built? The photo is dark, was the magnet destroyed in the incident?

Edit, closer look, yep. Chewed to bits. You can't just put the pieces together as it is now lots of small magnets. I'd imagine that finding a replacement would be unlikely.

Need to find a way to better secure the magnets in the new motor...

Keith
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Old 07-28-2019, 11:01:59 PM
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Default Re: Ge Electrak, E8M drive motor failed

I made a offer on a motor on ebay and hope it works out.
I will make a call to a place in Charlotte monday about it but I think I will run into a wall.
This was built in about 1968 to 74 I think.
Never found a serial number list to get a exact date.
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Old 07-28-2019, 11:16:14 PM
Tracy T Tracy T is offline
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Default Re: Ge Electrak, E8M drive motor failed

magnet glued in the case? i have had the glue turn loose on small air cooled starters, if it hadnt chewed up the magnet i have used high temp silicone to glue the magnet back into the case with good results! measure the inside of the housing to determine the ID then measure the length of the magnet, i have a few junk dc motors if i have a magnet that will work its yours for shipping.
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Old 07-28-2019, 11:27:48 PM
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Default Re: Ge Electrak, E8M drive motor failed

This magnet is in a zillion peices and flakes! THanks for the offer and I will measure and see what size it is,There is 2 different sizes in there.
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Old 07-29-2019, 01:09:39 PM
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Default Re: Ge Electrak, E8M drive motor failed

Well I called Armature winding in Charlotte,they directed me to Manville I think it is,anyhow,if I had a model number on the motor they said they may could help as far as a good magnet and so forth but I checked the motor from end to end and cant find a number or tag.I am going to check the spare in the "collection" and see if i can find a tag on it.
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Old 07-29-2019, 01:48:45 PM
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Default Re: Ge Electrak, E8M drive motor failed

I wish I would have known something was wrong. I would have tried to help you out. We had plenty of fuel and cleaners we could have helped with the Maytags, but I know nothing about the GE tractors.

Where were you set up at?
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Old 07-29-2019, 02:06:39 PM
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Default Re: Ge Electrak, E8M drive motor failed

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Originally Posted by Mike in NC View Post
I wish I would have known something was wrong. I would have tried to help you out. We had plenty of fuel and cleaners we could have helped with the Maytags, but I know nothing about the GE tractors.

Where were you set up at?
Oh the maytags will just be a drain and refuel, no biggie,I put 2 ounces of oil to 16 of gas ,way to rich. I was beside that man killer wood spliter! Traveled light. Looking at trying to get a room for a friday night so I can hang longer than a day.
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Old 07-29-2019, 03:39:21 PM
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Default Re: Ge Electrak, E8M drive motor failed

Next years show dates should be 7/23-7/25.

We were set up across from the 8 HP Hercules and grist mill. We had all the Briggs and a few garden tractors.
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Old 07-29-2019, 04:14:47 PM
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Default Re: Ge Electrak, E8M drive motor failed

So it sounded different, but still ran and transported you while grinding up 1 magnet until it jammed up. That indicates maybe it can run with only 1 magnet. That being the case, you may be able to stick any old magnet in there and have it work good enough to carry you. I would use Devcon plastic steel or hi temp JB weld. Just make sure you get polarity right.
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Old 08-05-2019, 09:38:04 PM
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Default Re: Ge Electrak, E8M drive motor failed

Well the motor came this evening.Box looked like it was dropped from a C130 without a parachute.Very little packing around the motor but there was some. Motor was ok but I heard noise as I turned it. I took it apart and found alot of trash that was scratching around the armature as you would spin it.Chances are it would have torn a magnet loose after a while had I run it this way.It is all clean now and I found the outer bearing to be noisey so I have both bearings off it and will replace them.Turns out,the bearings are the same for both deck motors and drive motors. So that means about 10 bucks for bearings and she should run quite as a church mouse.

I also found I need to learn more about this magnet glueing thing. 1 of the deck motors let go a magnet last week during testing after replacing it's bearings.Turns out the deck motors and the drive motors are the same diameter and the magnets are the same! So that means once i get the tractor going and out of the shop I will sit down and wrestle the loose magnet out of the deck motor housing and try to glue it in the drive motor.That way,it is fixed, and free for other adventures. I am kinda wanting to build a electric tractor so this will be it's motor if my repair works out.
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Old 08-06-2019, 01:08:10 AM
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Default Re: Ge Electrak, E8M drive motor failed

Evidently what ever glue they used on those magnets is starting to give up the ghost. Too bad they were not secured mechanically.... I'd imagine that epoxy would work well as long as everything is cleaned really well beforehand...

Keith
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Old 08-06-2019, 07:47:28 AM
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Default Re: Ge Electrak, E8M drive motor failed

Many of the motor manufacturers used Lord brand epoxy for the magnets.

The magnets (before they are magnetized) are squirted with a layer of epoxy then placed in the can with automation. I sold many induction heating machines to then quickly heat the outside of the can in about 4 seconds so the epoxy interface would reach 360F to cross link and harden. Through testing we found that 350-500F was acceptable to kick off the epoxy cure. Then they are magnetized and assembled.

I often wondered what the life of that epoxy would be at operating temperatures before it outgassed and failed. Looks like the answer to that is x years as in today. If it was me, I'd take all the motors apart, clean and re goop the perimeters of the magnets and the can with hi temp epoxy.
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Old 08-27-2019, 12:58:08 AM
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Default Re: Ge Electrak, E8M drive motor failed

Good to know you are mowing with E8 again Mack!
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Old 08-07-2019, 10:37:05 PM
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Default Re: Ge Electrak, E8M drive motor failed

Well the motor runs good with new bearings in it.But last week when i found a wiring issue hooking up the mowing deck,trying to connect to the old solinoid made it not work right,A bump and it worked ok but yesterday,nope. So 1 is ordered.But here is a pic of the motor apart ready to go back together. Edit,I found a local shop that told me just to use a good grade of 2 part epoxy on a clean surface and make sure the poles are right.Hum,didn't I read that last week? .
Like I said,it pays to hang out with smarter people than yourself.
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