Shear pin mod question - Snowblower Forum : Snow Blower Forums
 
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post #1 of 9 Old 02-22-2015, 09:02 PM Thread Starter
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Shear pin mod question

So most machine have pins that are threaded and have a lock nut, thus requiring two wrenches to put in a new one. And I've seen or had a older machine that had a pin and a cotter pin to secure it.

So I was thinking why cant I grind a flat spot on my bolts and drill a cross hole in it and use a cotter pin to secure it. Be nice to keep a few bolts and cotters with the machine when I take it somewhere to help out someone.

You guys see any drawbacks to this idea? Thanks
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post #2 of 9 Old 02-22-2015, 09:16 PM
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Sure it would work....Just make sure the hole is in the right spot so it does not rattle around. If you have the type of pins with grooves they need to align with the transition from the shaft to the auger.

My first reaction was it seems like a lot of work just to avoid using common wrenches. If you feel it is easier for you, try it.

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post #3 of 9 Old 02-22-2015, 09:24 PM
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I say just go to Harbor Freight or something and pick up a cheap wrench or socket set. Some auto parts stores even sell the sockets separate. Also, pick up a small pouch or bag with a zipper. Fasten the bag to the machine and stick a couple tools and your extra bolts in there. Might want a small hammer and punch too.

There was a post on here from someone who used a large piece of PVC pipe strapped to his handlebars as a tool box. Similar to what the plumbers do on top of their vans.

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post #4 of 9 Old 02-22-2015, 09:28 PM
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Quote:
Originally Posted by cdestuck View Post
So most machine have pins that are threaded and have a lock nut, thus requiring two wrenches to put in a new one. And I've seen or had a older machine that had a pin and a cotter pin to secure it.

So I was thinking why cant I grind a flat spot on my bolts and drill a cross hole in it and use a cotter pin to secure it. Be nice to keep a few bolts and cotters with the machine when I take it somewhere to help out someone.

You guys see any drawbacks to this idea? Thanks
MTD shear pins are as you describe. I prefer a bolt style with a crush nut myself. Either should be coated with a suitable anti-seize to protect from rusting in place.


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post #5 of 9 Old 02-23-2015, 09:02 AM
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shear pins are engineered to snap at a specific load force
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post #6 of 9 Old 02-23-2015, 10:28 AM
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Instead of an anti-seize grease works. Anti-seize is good for close tolerance parts but if used in a loose fit application like shear pins or augers it dries out and can easily wash or wear off. Grease is just a better choice and it's cheaper and if you have or have added zerks to your augers you'll already have grease handy.

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post #7 of 9 Old 02-23-2015, 11:15 AM
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Quote:
Originally Posted by Kiss4aFrog View Post
Instead of an anti-seize grease works. Anti-seize is good for close tolerance parts but if used in a loose fit application like shear pins or augers it dries out and can easily wash or wear off. Grease is just a better choice and it's cheaper and if you have or have added zerks to your augers you'll already have grease handy.
True, grease would work fine. Fluid Film lanolin based spray would work well too. I prevents corrosion quite well.

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post #8 of 9 Old 02-23-2015, 07:42 PM Thread Starter
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Thanks for the input guys. No big deal to keep tools around for this but our church has a JD blower that has pins that seem fragile s eggs and with the amount of guys that run the machine I know the tools would soon be no where to be found. My one Simplicity had cotter pin pins and I stuck a couple in a magnetic key box and always has them stuck to the machine.
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post #9 of 9 Old 02-23-2015, 10:25 PM
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Wow it's always the simple stuff. That magnetic key box is a great idea for extra shear pins.

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