Snowblower Snowblower sheer bolts.

[RickB]

I fully understood your post and was not calling you down on it. I am just a little confused by my manual which is telling me one thing on one page and a completely different thing on another. It might be because my blower is 6 years old and maybe a design from "the past".

They should do better than that. Sorry, I just wasn't getting your drift, there.
(pun intended)

 

[Northland]

The answer to your original question I think is that they are not redundant. Though stranger things are true.

Mine too. My Agro Trend C-60 calls for Grade 2 hex bolts at the auger drive and Grade 5 bolts elsewhere. I went through a lot of the Grade 2 bolts before I learned to take it easy rather then slamming into icy hard snowbanks.

 

[Fromjim]

As mentioned, each shear bolt is there to protect that part of the blower, your auger may get caught in something that the fan can't so the smaller bolt in the chain drive to the auger/augers is sheared first, as for the shear bolt on the PTO shaft, it will break easier depending of a few conditions, one being the angle of the shaft, should be 20 degrees or less and the speed of the PTO shaft,(540), if it is run too slow in heavy snow conditions you will break a lot of pins, another is the tightness of the bolt, make sure it is tight always and it will last much longer, my tractor has 105 PTO Hp and at first I would break a pin every storm, since I have been doing the above I seldom break a pin unless something that would damage the blower/tractor PTO gets caught in the blower. I always use grade 8 or 8.8 metric bolts, only threaded on the end and always with locking nuts.

Hope this helps, if you know something about soleniod valves please see my post on Problems with my new "Kuboto M108X Soleniod Problems"

Jim