Replace mandrel assembly on a Sears Lawn Tractor 917.275180

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  #1  
Old 05-07-09, 02:54 PM
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Replace mandrel assembly on a Sears Lawn Tractor 917.275180

Hi, I have a problem with my lawn tractor (Sears Model: 917.275180). I hit a rock and the blade sheared off the bottom (star) portion on the shaft that is part of the mandrel assembly.
I have a replacement bolt (part # 137645) but I can't get the toplock nut off the assembly.
Normally I would use the blade to take the nut off but can't as there is nothing to keep the blade in place. I've tried to hold the mandrel pulley in place but that hasn't worked.
Is there a way to lock the pully / mandrel shaft in place (a tool for this purpose) so that I can remove the thing.
Any advice on getting this thing off from the tractor would be appreciated. Thanks
 
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  #2  
Old 05-07-09, 04:57 PM
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You may have to take the mandrel off the deck. Not a really hard job....remove the deck and only 4 screws to remove the mandrel. Everything goes back on pretty easily.
 
  #3  
Old 05-07-09, 09:34 PM
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I don't recommend trying to remove the mandrel or you may wind up having to replace the entire assembly. There are 3 bolts holding the mandrel on and they are very prone to breakage if you try to remove them. Sometimes you get lucky, but most times one or more breaks off in the aluminum mandrel housing.

A strap wrench will hold the pulley, or use an impact wrench to remove the nut. That's how I get them off.
 
  #4  
Old 06-25-09, 02:50 PM
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Same problem

Here's a stupid question...if I take off the top nut will the shaft (137645) come free so I can replace it?
Thanks....
 
  #5  
Old 06-25-09, 03:15 PM
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Yes it will. Not a stupid question at all.
 
  #6  
Old 07-04-09, 12:14 PM
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replacing mandrel

Cheese was right. I broke one of the bolts in the Aluminum mandrel housing. I also cannot get the top bolt off the mandrel. Where do I find a stap wrench?
 
  #7  
Old 07-04-09, 02:08 PM
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I think sears has them, and probably many of the automotive parts stores have them too.
 
  #8  
Old 08-19-14, 03:46 PM
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I know this is an old thread, but I have the same problem. I will try using an impact, but are threads standard or reverse thread?
 
  #9  
Old 08-19-14, 06:11 PM
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Standard threads.
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