MTD Drive System - Snowblower Forum : Snow Blower Forums
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post #1 of 23 Old 01-05-2015, 07:30 PM Thread Starter
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MTD Drive System

Hoes anybody have experience with this MTD drive system, with the traction control? The right wheel will only drive the machine. The sprocket on the left side on the lower shaft spins freely. I suspect that this is my problem.




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post #2 of 23 Old 01-05-2015, 08:24 PM
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Originally Posted by Motor City View Post
Hoes anybody have experience with this MTD drive system, with the traction control? The right wheel will only drive the machine. The sprocket on the left side on the lower shaft spins freely. I suspect that this is my problem.
Did you get a hold of a service manual which might explain the trouble?
As you mentioned it is most likely the problem but why the engineers elected to go with a dual sprocket system like that could be characterized as overengineering. Maybe Donyboy would have a segment on this? Good Luck

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post #3 of 23 Old 01-05-2015, 08:55 PM Thread Starter
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i've only found the owners manual for it. I've never really seen any MTD service manuals online. It does seem to be way over engineered, though.




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post #4 of 23 Old 01-05-2015, 09:43 PM
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Maybe one of the steering clutches isn't locking closed? Or there is a pin or key way broken somewhere. I would assume with dual drive like that this has to be one of those steerable ones.

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post #5 of 23 Old 01-05-2015, 10:33 PM Thread Starter
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The only thing I can figure out is that the sprocket that is spinning free, shouldn't be. Each wheel is on a separate axle shaft. So it seems the only logical why the left wheel is driven, is thru that sprocket. The steering sprockets seem to lock each individual wheel, so it pivots, to turn easier. I may have to just tear it down, but the polar freeze is here and its suppose to be seriously cold all week. The saft isn't service able, and its not a cheap part, cheapest I can find it is $211 + shipping.

I bought it to flip, but its been a money pit. I'll be lucky to break even on it.




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post #6 of 23 Old 01-05-2015, 10:48 PM
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Could you post up the model number, so that we can look at the diagrams and offer a little more arm chair quarterback expertise?

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post #7 of 23 Old 01-05-2015, 11:15 PM
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I believe your MTD is identical to my Craftsman (I understand mine was made by MTD). The attached photo of mine looks the same. I took this photo a couple of years ago after finishing repair. These machines have (2) separate 1/2 axles. I've broken a 1/2 axle twice and repaired it myself. I bought mine new and only received the owners manual, no service manual.

I believe you are correct in that the sprocket should not turn unless the shaft turns. You should be able to compare the left one vs the right one to see how it is attached. I can't see anything on my owners manual parts diagram to indicate any means of attachment.

The part number is 618-0575 for the "Shift Assembly; Steerable Drive" which is the shaft and 4 sprockets on the shaft.
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post #8 of 23 Old 01-05-2015, 11:16 PM Thread Starter
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Its a MTD 31AH5C3F401. This is the same machine I retro fitted the power window motor for the electric chute.
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post #9 of 23 Old 01-05-2015, 11:20 PM
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Parts Diagram

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post #10 of 23 Old 01-05-2015, 11:21 PM
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Parts List

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