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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



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Old 08-07-2013, 10:11 PM   #1
rlhoffman
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Default 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

Hello All,

I recently got this gold cart in a trade. The front left wheel spindle was broken from the frame. I welded that. But because of this, when I loaded it onto the car dolly I left the rear wheels to roll and the cart in Neutral. Needless to say, freeway speeds caused the motor to seize. It is bolted directly onto the rear axle. I have removed the two bolts that appear to be fastening it, but it won't budge. I have read a few other articles on this forum that suggest there are three or four bolts that hold the motor to the axle. I am including a picture with markings of the two bolts that I removed. Am I on the right track or WAY off? Additionally, this is a resistor cart and one set of resistor coils appears to be squished together and touching. Should I carefully stretch them so they aren't touching?
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Old 08-08-2013, 06:53 AM   #2
Sir Nuke
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

HOLY CRAP! you drug the cart at highway speed?? I am suprised the motor didn't explode. even though you put it in neutral, that is ELECTRICALLY in neutral, its still hooked to the gear train/differential. Can you still roll the cart? any bad noises coming out of the rearend?

well YES there should be either 3 or 4 bolts attaching the motor to the rearend. they are like 1/4" bolts, and would be on the face of where you have your arrows in the picture. now if one or two are missing, and the motor still won't "unplug", thats understandable. considering the condition looking at the picture. the case if the motor is steel, the case of the Differential is Aluminum, you can try to put something like WD-40 and let it soak to help losten it up and I bet some gentle tapping/rapping back and forth/side to side should do the trick. Just remember the motor is splined into the input shaft of the diff, so don't WHACK it, just tap it to loosen it all up. you may need to get something to ledge in between the motor and the diff as it try to unplug. you will end up needing to move the motor about an inch to an inch and a half before the spline totally disengages and teh motor os totally free.
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Old 08-08-2013, 08:21 AM   #3
Bill
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?



Wow, I would love to calculate the motor speed before it grenaded on this one.
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Old 08-08-2013, 08:53 AM   #4
Sir Nuke
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

Quote:
Originally Posted by Bill View Post


Wow, I would love to calculate the motor speed before it grenaded on this one.
lets see......stock height tires.....stock diff......pulling at "highway" speed.....lets say he was taking it easy and going say 50....that about 12,000 rpm.

so simething tell me he was going a lot slower.
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Old 08-08-2013, 07:12 PM   #5
rlhoffman
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

Try 65 mph on freeway.
Motor seized, cannot push cart forward or reverse.
If rear end is lifted you can turn a rear wheel and the other wheel spins in opposite direction so I'm certain it's motor and not axle based.

So the bolts I remove are on the round part of the motor, not the end-cap?

That explains why it isn't budging.

Any suggestions on the resistor coils touching?
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Old 08-08-2013, 08:00 PM   #6
Sir Nuke
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

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Originally Posted by rlhoffman View Post
Try 65 mph on freeway.
Motor seized, cannot push cart forward or reverse.
If rear end is lifted you can turn a rear wheel and the other wheel spins in opposite direction so I'm certain it's motor and not axle based.

So the bolts I remove are on the round part of the motor, not the end-cap?

That explains why it isn't budging.

Any suggestions on the resistor coils touching?
well that would have been about 15,000 rpm. the bolts on the end cap will only remove the cap. you need to remove the bolts at the split line where motor connects to the Differential. when you get the bolts out, I will bet you will find that the motor has come apart, and the stator and rotor have become one.
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Old 08-09-2013, 08:22 AM   #7
49ford
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

I have the pieces to fix this motor mess. Wish I was close.

My question is what year ezgo motors will fit the 79 or 80 model ezgo?
thanks
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Old 08-09-2013, 10:19 AM   #8
JohnnieB
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

Quote:
Originally Posted by rlhoffman View Post
Try 65 mph on freeway.
Motor seized, cannot push cart forward or reverse.
If rear end is lifted you can turn a rear wheel and the other wheel spins in opposite direction so I'm certain it's motor and not axle based.

So the bolts I remove are on the round part of the motor, not the end-cap?

That explains why it isn't budging.

Any suggestions on the resistor coils touching?
The two bolts pointed to in the picture are the correct ones to remove the motor. There might be a third bolt at the 6 O'clock position, but I don't know one way or the other.

The problem is the splines mating the differential's input shaft to the motor's output shaft are rusted together.

I did roughly the same thing a couple weeks ago, but I was riding the cart when the motor seized. (Armature was spinning at about 7,600RPM when it exploded and became one with the field windings)

I'm not suggesting you try this, but if all else fails, it might work.
Once the mounting bolts were out and no longer holding the motor housing in place, my entire motor would turn when wheels moved.

The towing service had offload the cart in front of the house and I wanted to move it closer to the garage and my tools, so I pulled it slowly with my riding lawnmower while my wife steered the cart.

When we got the the shade tree by the garage, the motor was lying on the axle. Spinning the entire motor must have wiggled it loose.

-----------
There is little, if any, of your motor that is salvageable, so you can't hurt it, but you can damage other parts of the cart getting it off, so be careful.
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Old 08-10-2013, 02:43 PM   #9
rlhoffman
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Default Re: 1980 E-Z-GO Textron ( Marathon ? ) seized motor removal?

well the two bolts I removed were the correct ones. It took a 10 lb sledge hammer, but the motor is finally off. Unfortunately, the spare 36 volt Cushman motor will not work as it is not a 10 spline spindle. :-(

I am stuck either rebuilding this motor, buying a used motor or spending more $ than I wanted and contacting plum quick.
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