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Lockedshear bolt

posted on February 06, 2010 at 10:39PM Inappropriate?

left side auger shear bolt keep breaking

replies: 4 latest post: February 07, 2010 at 09:45PM by AdamO
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posted on February 07, 2010 at 08:32AM
 

Can you give us more information on the snowblower?  Brand, age, etc.?  We have no idea what type of shear pin your machine uses.  There are several different styles.  If it's a threaded type, you may be over-tightening it.  What are you putting through the machine?  These machines aren't meant to throw rocks, branches, bricks and assorted yard decorations.  We need some background information to help you.  Please let us know. 

posted on February 07, 2010 at 08:03PM
 

While the auger is "loose", you may want to make sure the auger is spinning freely on the shaft, without binding on anything (no shear bolts holding it at present).

This will verify that nothing got into that side of the auger and bent or jammed up the auger, itself.

posted on February 07, 2010 at 09:42PM
 
In response to winstonrl's post from February 06 2010 10:39PM

left side auger shear bolt keep breaking

Left side auger shear bolt installed too tight.

posted on February 07, 2010 at 09:45PM
 

Ah!

Maybe the 1/4-20 bolt should be tightened with a 7/16 inch, 1/4 inch drive spinner handle?

That would certainly get the nut tight enough to not vibrate off the shaft, while not unduly stressing the 1/4-20 threads.

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