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Old 01-12-2011, 06:44 AM   #1
Brian
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Join Date: Nov 2010
Location: New York State
Equipment: BX 25
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Default Shear pin for snow blower question

Instead of learning the hard way by experimentation, i figured i would ask and see who may have tried something else.
I have a BX2750A snow blower for my BX 25. If you have one you know that Kubota has special pre cut bolts that have a groove in them to facilitate shearing.
Have any of you who have a 2750 used regular grade 5 colts instead and if so do they shear okay if you get a rock.
I know that the main shaft with the throwing blades used regular grade 8 5/16 bolts now. That came right from the service manual at the dealer.

Do you know a source for shear bolts that you can order in quantity. I live about 50 miles form my dealer and it isn't always handy to drive there in the middle of the winter.

Since this is my first year with the blower , the learning curve has been pretty steep so far. i am sure I will get the hang of it and eventually not use so many shear bolts. Or at least i will have blown away all the stones after a fashion!!!
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Old 01-12-2011, 10:06 AM   #2
Babyfat
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Default Re: Shear pin for snow blower question

I would stick to the factory shear bolts, we have a guy that buys the 15-20 at a time to start he year. If a grade 5 does not shear it could cost you alot more to repair.
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Old 01-12-2011, 10:58 AM   #3
Mingy
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Default Re: Shear pin for snow blower question

I gave up on special shear bolts a long time ago.

I just go with Grade 5's. If you are concerned, try something a little weaker (like a chinese 'grade 5' ).
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Old 01-12-2011, 11:39 AM   #4
Kubota_Man
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Location: Kellogg, Idaho
Equipment: BX24, Rear blade, Front blade, Snowblower, 54" MMM, Box scraper, Landscape rake
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Default Re: Shear pin for snow blower question

I go to the local Lowes/Home Depot type of store and buy the grade 5 bolts alot cheaper than the dealer place. Carry a punch a wrench and a socket/ratchet with ya.

Adjusting the skid plates to just above the rocks will greatly reduce the time you are spending replacing the bolts and increasing your paly time
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Old 01-13-2011, 08:22 AM   #5
Mingy
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Default Re: Shear pin for snow blower question

I tell you, what costs me shear pins are newspapers & advertizing. The geniuses throw them on the driveway or the snowblow brings them. The instant the propeller hits a soggy newpaper, its a half hour job to extricate it and replace the bolt. They don't come willingly!
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Old 01-13-2011, 10:46 AM   #6
Brian
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Default Re: Shear pin for snow blower question

I just found out by breaking one; there is a shear bolt that's a plain Grade 5 1/4" bolt that connects the blower to the gear box for the cross screw augers. Its a plain old 1/4" bolt. So, reason would say that a 1/4" on the auger would work but that since they are 5/16, that's why Kubota cores them down to 1/4". So, I could probably get away with a reg bolt if it was 1/4". But alas, it is not to be
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Old 01-17-2011, 06:51 PM   #7
tiredguy
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Location: northern lower Michigan
Equipment: B3030 HSTC,B2781 51" front mounted snowblower,60" MMM
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Default Re: Shear pin for snow blower question

Brian,
do you have a hacksaw and a vise? You could always buy the cheap Chinese
grade 5 bolts and make your own "groove" in them using the metal cutting hacksaw.You could clamp the hacksaw in the vise and chuck the bolts in a
drill and use that to do the work to quite easily.You'd just have to be sure the groove you make is in the correct spot so that it's weakened there the same as your store bought shear bolts.
If you don't have a hacksaw a flat metal file would work to cut the groove by using the 'corner" holding the file at an angle to make the edge bite in.
Al
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Old 01-18-2011, 04:06 AM   #8
Babyfat
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Default Re: Shear pin for snow blower question

Are you guys really that cheap? The Kubota shear bolts are only $1.34 with the nut!
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Old 01-18-2011, 06:58 AM   #9
Brian
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Default Re: Shear pin for snow blower question

For the price they are, i am sticking with factory shear bolts.
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Old 01-21-2011, 07:39 PM   #10
tiredguy
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Default Re: Shear pin for snow blower question

Babyfat,
I'm not that cheap nor have I sheared the first one yet personally,
but sometimes when people run into a problem like Brian has you look
for a more economical solution,or sometimes a temporary solution.If
he went through a dozen a day $1.34 adds up quickly to an unreasonable
amount of money to be wasting.

If I used up my stock during the weekend for instance,I'm sure not
going to try and contact one of the people at the dealership at home
then drive the 100 mile round trip to get more.I have seen others
grenade gear boxes on rototillers because they put the wrong bolt in
without thinking about the consequences.Brian ask a legitimate question
and we all pitch in with our two cents worth of opinion.
Al
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