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Discussion Starter #1
The other day I was using the sno-thro attached to a gt 18 garden tractor. I heard a quick ping and metal on metal like a shear pin was thrown and bounced. The augers stopped spinning. Both shear pins are intact. The shaft is turning and the belt turning as well. I’m not well versed in snowblowers but it seems to me in the gearbox went then I would have heard grinding or some terrible sounds. Does anyone know if there is another shear pin or some other simple fix? They are predicting 20 plus inches of snow this weekend and I have a driveway about 200 yards long!
 

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If this the 48" 2 stage unit then you could have taken out one of the 3/16 keys that are on the either end of the impeller shaft. 1 is in the belt drive pulley hub and the other is inside the gear housing on the worm (gear) . on the same shaft there is 2 roll pins that go through the impeller and shaft. There is also a T-key in the gear housing for the main gear.
you can see the parts exploded view at this site 9 Parts tree)

https://www.partstree.com/parts/ariens/accessories/831010-ariens-48-two-stage-sno-thro-sn-006001-above/sno-thro-48-s-n-006000-up-continued/
 

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It would be the numbers on the ID tag. Something like - Mod. "831010" and Ser. 006000

There aren't a lot of options and the one Lottstodo linked too is likely correct, just want to make sure.

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Discussion Starter #6
I’ll take a look in daylight tomorrow for the serial number. The link above looks to be right though.

I looked over the plans and also noticed the keys that Lottstodo mentioned. Would the fan still turn if these keys were now gone or would that also have stopped?
 

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If the 1 at the belt drive hub let go then no the fan impeller would have stopped too, however it may try to turn with fit friction even though the key is sheared, but wouldnt do so under load. If the impeller/ blower is powered good and strong then I would suspect either of the 2 other keys in the housing and the possibility of the gears as well. Hope not!!
 

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Discussion Starter #8 (Edited)
Ok. Couldn’️t find the model number. I did take it apart to find that when I manually turn the large wheel the fan and augers turn. Now, I’️ve done work on motors before but never snowblowers so I may sound like an idiot. According to the diagram on partstree, the “sheaveâ€Â� (#63) spins freely but the larger “sheaveâ€Â� (#61) does not turn with it. Also one of the idler wheels is seated against this larger sheave. Should there be a second belt? I’️m just surprised there would be metal on metal like that. Upon further inspection of the diagram i would assume I’m missing a second v-belt? I did not see one in the snow when it stopped but it could have been launched.
 
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