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Sears craftsman electric


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#1 DH1 OFFLINE  

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Posted March 14, 2010 - 03:50 PM

This is little tractor I put together about 3yrs ago, got it as a rusted out junker, not running with n/g mower deck. I cleaned, fixed the chassis and pained it.
I tried different combination's of motor and battery's, ended up using 2 12 volt group 31 deep cycle battery's. The motor is a starter/generator off a Tecumseh HH120 (the s/g off my 67MF12), running at 24 volts. More than enough power to drive the little sears, top speed is about the same as the gas version and will lift the front wheels in 4th gear. 45 minutes non stop use the motor is too hot to touch. Motor spins the wrong way and is not reversible so I put a twist in the belt (fig 8) to get the right rotation. Found that if you ground the field terminal you get less rpm, less power. 2 speed motor, 5 speed trany, 10 different speeds total.
Power is fed to the motor though contractor and has a foot switch that has to be held down to power the motor.
I use this to pull a little trailer for yard cleanup, you jump on, turn the key, pic a gear, push the foot switch and full power instantly.

This is not a garden tractor, it does not cut grass but man put a 10 yr old kid on it they'll play with it all day long and the smile on there face priceless.

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#2 Bill56 OFFLINE  

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Posted March 14, 2010 - 04:15 PM

Maybe you could keep your eye out for an electric motor from a junked electric forklift or something. I don't know much about electrical things, so this is just my uneducated opinion, but I'm guessing that S/G motor may not last too long.
Thanks for sharing the info and pictures... looks like a fun vehicle!

#3 Bolens 1000 OFFLINE  

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Posted March 15, 2010 - 05:58 AM

Definietly a great job! The kids should have a blast:bounce:
Ditto on bills post about the SG.

#4 mjodrey OFFLINE  

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Posted March 15, 2010 - 09:53 AM

Very nice job.

#5 NUTNDUN OFFLINE  

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Posted March 15, 2010 - 12:02 PM

Pretty cool little tractor, definitely be fun for the kids. The only thing you have me paranoid on is the wiring across the batteries.

#6 DH1 OFFLINE  

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Posted March 15, 2010 - 05:00 PM

Pretty cool little tractor, definitely be fun for the kids. The only thing you have me paranoid on is the wiring across the batteries.



The lights, volt meter and main solenoid are connected to 1 battery 12volts.
The motor is connected to both batteries in series, 24 volts.
There is a key switch (high amp) and a battery terminal disconnect.
I tried to make it safe and idiot proof, it's more a kids toy than anything else.

#7 DH1 OFFLINE  

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Posted November 28, 2010 - 03:52 PM

Video of the Electric Sears bombing around.
This is my 1st video ever.

YouTube - Electric Sears Lawn Tractor 1

#8 Bolens 1000 OFFLINE  

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Posted November 28, 2010 - 05:18 PM

That turned out really well!
Great Video

#9 tractormike OFFLINE  

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Posted November 28, 2010 - 07:43 PM

Nice job on building that electric tractor Doug! I bet the kids have a blast with it. congrats on getting the video posted also.

#10 DH1 OFFLINE  

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Posted February 01, 2011 - 09:57 PM

Picked up an automatic 24volt charger for the Sears Craftsman electric lawn tractor earlier this year, forgot I had it, was doing some clean up and found it. A while back I put an ad on Kijiji wanted broken cordless push mowers and bought one for $20. the batteries were n/g but it has a good motor and charger.
Tested the charger, figured out the polarity, found that it puts out about 5 amps and shuts off when batteries are charged. The Sears has a 24volt system so it works out great, no more charging the batteries one at a time, just hook up the 24volt charger and forget about it, next day ready to go.
Electric Sears 001.jpg

#11 MH81 ONLINE  

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Posted February 01, 2011 - 11:08 PM

Really cool get-about. I bet the kids love it. As for the SG, run her till she stops or you find something better, doesn't sound like your working it to hard.

Would a cooling fan help it?

#12 DH1 OFFLINE  

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Posted February 01, 2011 - 11:21 PM

Really cool get-about. I bet the kids love it. As for the SG, run her till she stops or you find something better, doesn't sound like your working it to hard.

Would a cooling fan help it?


Cooling fan would help, I would like to find out if and how to reverse the direction of the motor, it only spins one way the wrong way.

#13 Alc ONLINE  

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Posted February 02, 2011 - 01:42 AM

I'm not sure if this would work but how about making it a positive ground system , like the older equipment .

#14 MH81 ONLINE  

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Posted February 02, 2011 - 08:04 AM

Cooling fan would help, I would like to find out if and how to reverse the direction of the motor, it only spins one way the wrong way.


If you reverse polarity, does it do anything?
Weren't there a couple of SG units that had a backwards rotation? Something tells me Allis Simplicity, but IDK.

#15 tractormike OFFLINE  

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Posted February 02, 2011 - 08:54 AM

I think the only starter generators that spin the opposite way of most of them are the ones off from the cub cadets. Cub cadets had the pulley for the starter on the crankshaft end instead of like everyone else that had the pulley on the flywheel side.




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