Replace Shear Pins - Snowblower Forum : Snow Blower Forums
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post #1 of 19 Old 02-13-2017, 04:00 PM Thread Starter
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Replace Shear Pins

I've had my new Ariens 24" Deluxe for about 5-6 winters now and in that time I have never had to replace a shear pin. My driveway is perfectly flat and newly paved, so I don't anticipate breaking one. However, do they have a life expectancy? Should I just replace them because they're a few years old?

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post #2 of 19 Old 02-13-2017, 04:07 PM
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No, but do have spares.
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post #3 of 19 Old 02-14-2017, 10:02 PM Thread Starter
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Yeah, I have spares; that's not the issue.

I was just concerned because metal tends to rust and share pins certainly take enough abuse that over time I would think that they would weaken just from being in the harsh environment that they are in.
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post #4 of 19 Old 02-14-2017, 11:22 PM
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It seems most are dipped in yellow zinc coating. I found the dealer(Yamaha) shear pins to be better coated with what I can tell as a grey zinc dip then painted black. In either case it never hurts to keep them sprayed with a rust penetrate or some sort of lube/grease, the same goes for augers on the shaft if possible.. I liberally greased mine during re-assembly though in your case and I frequently check to ensure everything is moving freely.

YAMAHA YS624 |
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post #5 of 19 Old 02-15-2017, 07:55 AM
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There is no life expectancy on shear bolts and having one that has weakened over time doesn't strike me as a concern. Having said that, replacing them at a cost of $10 seems fine if you prefer. To make them easier to take off going forward, it probably makes sense to add some anti-seize to the threads. (Of course you don't have that problem when they break.)
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post #6 of 19 Old 02-15-2017, 08:06 AM
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they probably dont really "weaken over time"..but even if they do, so what?
a slightly weaker than normal shear pin is fine, because they are designed to be "weak" in the first place!
sure, maybe in theory, it might break easier than a non-weakend shear pin, but thats not a bad thing..
seems a waste to replace one because it "might break"? they are *supposed* to break! its their only job.

my view: if its a real shear pin, and its not broken, its fine..no need to replace it.

scot


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post #7 of 19 Old 02-15-2017, 08:21 AM
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Garage
If you have greased your shear pins, do it! Remove them, grease them, preferably with synthetic grease. Have you been using your grease gun and hitting the zero fittings?
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post #8 of 19 Old 02-15-2017, 06:40 PM Thread Starter
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Quote:
Originally Posted by JLawrence08648 View Post
If you have greased your shear pins, do it! Remove them, grease them, preferably with synthetic grease. Have you been using your grease gun and hitting the zero fittings?
Yes, I grease the zerks every spring as a part of my storage routine. However, I have never removed the shear pins.
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post #9 of 19 Old 02-15-2017, 07:33 PM
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When you grease the zerks, it is a good policy to next remove the sheer pins. Then spin the augers and you can distribute the grease along the shaft and make sure that the auger is not rusting on to the shaft. It saves a headache down the road of the sheep pins not operating, and stripping the gear case gears instead.
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post #10 of 19 Old 02-15-2017, 07:43 PM
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If syour greasing the Rakes, the grease should be coming out of both ends AND where the pins reside. That will grease the pins. Try turning them with a 1/2" wrench...... If they turn, they're free and greased. If grease isn't coming out of both ends of rakes, there is not enough grease or they're frozen to the shaft....and the pins will be useless. You can never have too much grease. It's cheaper than pins, rakes OR a gear box!!!

GLuck, Jay
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