Washers keep falling off

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  #1  
Old 01-12-14, 09:46 AM
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Washers keep falling off

My good friend has a Sears snowblower. I do believe that it is a 536.xxxx model. After every storm this winter (3 so far) he has called me because he only has 1 speed and no reverse. I remove the bottom plate and fine the 2 washers in that plate. I put them back in place and the next storm same thing. These are the washers I am talking about.
Name:  snowblower shift.jpg
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washers go on #28 bearing
 
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  #2  
Old 01-12-14, 02:38 PM
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So when you say the washers for the bearing are falling out does that also mean the bolts are coming loose and falling out? If so I would re-install them adding lock washers and/or using a thread locking compound like LocTite. Use the blue color which is removable.
 
  #3  
Old 01-13-14, 06:32 AM
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Thats the problem. There are no bolts to hold them in. The ends of the bearing assembly are NOT hreaded for bolts.
 
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Old 01-13-14, 06:47 AM
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Here is an actual photo of the bearing assembly that I hijacked from another thread. Sorry.Name:  snowblower shifter.jpg
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  #5  
Old 01-14-14, 03:11 PM
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The bearing nubs sits in the slots in the engagement arm #19 (probably actually called something else)? Those washers would only come out if the travel of the arm was too great. As long as the the arm travel was within range the washers would stay put. That's setup is something like the old cat dozer dry clutch, actually.

There is likely something on that drive shaft either worn or a pin missing that lets the friction drive move too far. That lets the arm move the bearing too far and the nubs come out of their slots and the washers fall off.
 
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Old 01-16-14, 07:02 AM
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OK Let me re-phrase the problem. The problem is that the bearing keeps coming out of the forks.The forks are not bent.The shaft is lubed and slides easily by hand. Everything works fine by hand and works by lever. I am at a loss here. Thanks guys.
 
  #7  
Old 01-16-14, 09:32 AM
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When you put the bearing drive nubs back into place how are you doing it? Are you dis mantling the bolts from the friction drive or are you simply forcing the bearing back into place in the fork.
 
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Old 01-16-14, 02:34 PM
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Not dissassembling the bolts. I can get 1 end in the fork, then slide the other end in the fork. only takes alittle bit of force to do it.
 
  #9  
Old 01-16-14, 03:35 PM
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I imagine the problem is in the bearing or its interface with the friction drive. The bearing could be a little rough or a part of the interface strikes the outer casing on the bearing. Either would let the friction drive turn the bearing casing and spin it out of the forks. The washers are likely part of the design to prevent the casing from turning as opposed to just being spacers.

You may have to pull the bearing to see what shape it's in and what's striking what.
 
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