Shear Pin = Sheer Torture - Page 2 - Snowblower Forum : Snow Blower Forums
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post #11 of 16 Old 02-13-2019, 09:41 PM
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75 Grand Slams. This should have been pretty conspicuous. If you come up empty in the auger box, you're looking in the wrong place. Check the impeller. And check it for travel. Maybe the auger action is unimpeded, but the power tree is hiccuping. Torque always has a favorite side.

As you already know, there's also the gearbox. But before I'd go to that step, I'd just dip a sponge brush in yellow paint and run it across the blade end and see if that tells me anything after next incident. Might be a waste of time. You've been putting up with it anyway....

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post #12 of 16 Old 02-13-2019, 09:55 PM
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Just a couple of thoughts..

Have you checked to see if the holes in the auger tube are out of round? If they have gone seriously oval, only on the one rake on one side of the machine, perhaps the amount of play is allowing the inertia to shear the bolts when you go through a particular kind of snow/ice chunks.

Either that, or that one rake is catching on some part of the housing as was suggested. That might indicate excessive end play in the bushing or bearing.

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post #13 of 16 Old 02-14-2019, 03:40 PM Thread Starter
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No excess play, scrapes or wobble detected.
Spins free without a pin.
Thanks.
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post #14 of 16 Old 02-14-2019, 03:59 PM
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I have seen a few blowers do that and could not find the reason, however after a little investigation and q/a I asked the owner if by chance the side that was always breaking was the side that he favored against the bank (that last edge done) and indeed he would always do the edge with the rt side, so as a test I told him the next time for grins use the left of the blower to cut the edge last pass and sure enough he sheared a lft pin that hadnt ever sheared before and the rt was good.... It made sense after that he was constantly picking up and cutting the hard pack and ice pack on that dominate side (for him) . Rt handed.
maybe?? you too..
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post #15 of 16 Old 02-14-2019, 08:22 PM
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One other thing to check, and that would be that the cutting edge is down and sitting square to the blower. so that when you adjust the skid shoes you are doing so squarely.
I have seen cutting edges cocked in the machine as much as a 1/2" and when they would adjust the skids using that edge one skid was still way off and let that side of the auger travel to close to the ground and would let it grab fault cracks , concrete edges, sod , anything that was a bump high enough to grab.

This happened on a couple of machines a few years ago
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post #16 of 16 Old 02-15-2019, 08:32 AM Thread Starter
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I very well might be favoring using the left (problematic) side for cleaning edges. Will favor right side and see what happens.
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