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shear pins


knee deep's Avatar
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03-05-05, 06:12 AM   #1  
knee deep
shear pins

hello , i'm new here, read alot of info here though , great site.
I went to local repair shop for some shear pins for my mastercraft 8hp snowblower, they were out, but said i could use grade 2 bolts and they'd be fine .
Is this true?
thanks ahead of time. rick

 
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Azis's Avatar
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03-05-05, 06:46 AM   #2  
Azis
Hi ya Knee deep,
Grade 2 bolt is low carbon steel and not tempered and I am sure would work, however it is not designed or rated for a "shear load".
I did a quick search and found this advice from puey in another thread on the subject.
Posted By: puey61 You may want to reconsider using non-original shear bolts. They have a specific job to do. Yes, they may shear easily. Better for this to happen than to use a "stronger" bolt and have the gearbox disintigrate. The hole being larger on one side of the auger than on the other is by design. The correct shear bolt has a shoulder which fits into this larger diameter hole. Also, never crank the nut completely tight. The nut on a correct shear bolt will be a locknut. Again, for a reason. Tighten the nut up snug then back it off a half turn. This allows play and therby alllows the shear bolt to do its job properly...shear!!!
GL

 
knee deep's Avatar
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03-06-05, 05:36 AM   #3  
knee deep
thanks Azis for info,
I suspected as much, guess ill keep lookin for the proper pins
thanks again, rick

 
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03-07-05, 12:06 PM   #4  
Hello Rick, Rick here. Proper shear bolts are highly recommended as they have relief cuts in them to enable such to effectively shear. I would not use a grade 2 bolt unless it is in an emergency situation. And then stay away from ice and/or hardpack. A gearbox rebuild is quite costly. I believe Mastercraft is an MTD product, check with your local MTD service dealer for replacement shear bolts. Do you have the model # of the chassis handy? I can confirm whether this is an MTD product or not.

 
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03-07-05, 06:26 PM   #5  
knee deep
thanks puey61,
i have located some shear bolts today, this is an mtd
it was used when i picked it up , so i got ahold of mtd a while back, they emailed a manual for me,
thanks again rick.

 
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03-08-05, 03:10 AM   #6  
Any time. You know where to find us should you need anything again.

 
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