If the motor is also making noise, I would believe the actual problem is in the motor bearings, and the belt failure is only a side effect. I once built a 3D-printed snow blower with a very similar design, and it’s surprising how violent the impacts that reach the motor can be, even through the shear bolt and the belt. In both that diy machine and the Yarbo snow blower I have now, when the shear bolt broke, the motor bearings were also damaged. In that sense, it might be safer to use only one shear bolt in the blower instead of two. I don’t know, however, whether that would then break constantly.
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I will definitely give it a good inspection when I get it apart. Thanks for your thoughts.
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just fyi that bearing problem can be quite hidden. But check that if motor is full of black dust it can be indicator that magnets hit to stator.
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I’m thinking I will bring it in the house and do a good deconstruction to look for damage.
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Great time to have a heated garage
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I wish 
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I am happy that I have wide door directly to bathroom (entrance for hot tubs). So I can just open door, trhow rug to protect floor and doorstep and drive it in 
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That’s awesome. Pretty much perfect!
The nut holding it on the shaft was quite loose causing it to move on the shaft.
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Thanks for the nice clear pics and the explanation.
Hopefully this will be the end of the problems for you. I’ll be watching for your next post which will be something like “Successful snowblowing run”!
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New belt same as the old. It looks like the spacer goes between the belt gear and the upper motor shaft. Otherwise the gear would run on the motor housing.
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Well maybe there’s two problems. I don’t believe they’ve sent the gear to everyone who had a failure but maybe they have. Thanks for the details.
When I started it after the fix there was a profound grinding sound and an over current error. I restarted it and it disappeared. I’m going to chock it up to a cold belt that needed to stretch a little but we’ll see. Too cold to take it apart again to look.
Instructions on how to take the assembly apart and install the new parts would have be useful.
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When you manually spin the auger motor, does everything turn freely?
Initially there was some resistance and a slight grinding when I hand turned the motor but it also disappeared after I ran it. I wonder if the damaged pulley has slightly worn a bearing somewhere in the motor or auger shaft. We shall see.
My brand new module made a noise that could be described like that when spinning by hand. Dare I say it’s “normal”.
I don’t remember it doing it when I first installed the module. In fact I recall being impressed by how smoothly it turned. We shall see if it’s an issue down the road.
I have noticed that the auger blade’s seem to have more play lately. I wonder what the transmission looks like inside.
Perhaps I am just being more aware. Again we shall see.
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