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Sears ST12 steering wheel removal


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#16 rewilfert OFFLINE  

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Posted December 18, 2017 - 08:01 PM

I’m at a point now where the steering wheel had to come off. I had some time today and decided to grind off the gear at the bottom of the shaft. I removed the half circle gear and crawled under the tractor with a 4” grinder. It took about an hour of grinding to get through the weld. It looks like the gear had been removed and welded back on sometime in the past. The glob of weld on the end was about 3/8” thick.

After grinding through the weld, I punched the shaft upward and the gear came right off. I then put the shaft and steering wheel in a shop press and pressed the shaft out of the wheel.

The whole process wasn’t hard, it just took a few hours.

In the process of grinding through the weld glob, I took about 1/8” off the bottom of the gear. I tend to think that the factory weld would have been easier to get off. Now I’m trying to determine if I should repair the threads in the top of the existing shaft or just get another shaft.

In the process of looking for another shaft, I’ve determined that there are a few different configurations. Some tractors have a C-clip grove above the wheel. Others, like mine, have a bolt on the top to retain the wheel and a C-clip below the wheel. I think the C-clip below the wheel was a later design to keep the steering shaft from falling out the bottom of the tractor when the steering wheel was removed.

27364454079_c7d2bfd2ce_z.jpgUntitled by rewilfert, on Flickr

24282551767_8bdc05c3c9_z.jpgUntitled by rewilfert, on Flickr

24282551457_def506d1b8_z.jpgUntitled by rewilfert, on Flickr

27364453769_a2d9ff9d39_z.jpgUntitled by rewilfert, on Flickr

38264251375_3142a9c981_z.jpgUntitled by rewilfert, on Flickr


Edited by rewilfert, December 18, 2017 - 08:07 PM.

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#17 KennyP OFFLINE  

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Posted December 19, 2017 - 07:00 AM

From what I can see on that steering shaft, it was used up to a 1977 16/6 GT, 917.25170. The 1977 SS/16 had a different part #. Should be plenty out there.

The 917.25930 ST/12 manual lists the shaft as part # 634A775


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#18 rewilfert OFFLINE  

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Posted December 19, 2017 - 01:22 PM

Yep, I found one.  It will be on its way to me soon.  Glad I was able to close the loop on this so quickly.  I was really concerned about getting the old shaft out and being able to source a replacement in a reasonable amount of time.


Edited by rewilfert, December 19, 2017 - 01:22 PM.

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#19 rewilfert OFFLINE  

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Posted December 22, 2017 - 04:14 PM

I have received and installed the new steering shaft.  The weld on the new shaft was MUCH thinner.  I also included a picture of the top of the shaft with all the parts installed to potentially help someone in the future.  This shaft has a bolt hole at the top to secure the steering wheel.  The C-clip below the steering wheel keeps everything from falling out the bottom of the tractor when the steering wheel is removed.  The steering wheel easily slides on and off.


27449150149_2904e58de3_c.jpgUntitled by rewilfert, on Flickr

38349652445_50aa7d168e_c.jpgUntitled by rewilfert, on Flickr


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#20 KennyP OFFLINE  

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Posted December 22, 2017 - 04:36 PM

I'd put some anti-seize on there.


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#21 rewilfert OFFLINE  

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Posted December 22, 2017 - 08:02 PM

There will absolutely be some sort of anti-corrosion substance put on the shaft when I permanently reassemble it. I’m not going through all this again!
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