Snowblower Shear bolts

[biggamefish]

I am looking for a parts number on the fan shear bolt for a snowblower attachment for a B2650. The other shear bolts for the auger are 70060-2539.

 

[sheepfarmer]

Need blower model. Mine for the B2782B are part numbers 70060 00726 and 70060 01337.

Front blower. The part numbers for bolts are both in the manual and also on a sticker inside the region where the auger is turning.

 

[North Idaho Wolfman]

We would need to know the snowblower model #, not the tractors model #, there is quite a few different models of snow blower.

And yes it's possible that it's a model B2650 snowblower, but highly unlikely as that is a really old model #.

 

[sagor]

We would need to know the snowblower model #, not the tractors model #, there is quite a few different models of snow blower.

And yes it's possible that it's a model B2650 snowblower, but highly unlikely as that is a really old model #.

One might need the serial number as well. For example, I have two BX2750D snowblowers, one old (broken), and one new. Each uses a different shear bolt for the blower due to different design changes over a few years. One uses a necked down Gr8 bolt (old), the new uses a shorter, regular GR5 bolt. Look up the specific snowblower on the Kubota web site under "Parts Finder"

 

[biggamefish]

So upon looking into it. I think the fan assembly just takes a grade 2 1/4 inch by 1.5 bolt. I don't think that it actually takes a shear pin. I looked at the one in the fan assembly and it is just a straight bolt.

 

[sheepfarmer]

Look into it carefully, there are bolts and then there are bolts. The shear strength matters. Is this a new snow blower, relatively speaking? Hunt up the numbers on it. I got my spares from my dealer, but some of the guys use substitutes and grind grooves as needed. One of mine is grade 2 and the other grade 5.

 

[biggamefish]

Yes it is a new machine 2017. I looked at the bolt last night and it didn't have any grooves like a typical shear bolt would have. It looked exactly like a 1/4" x 1.5" bolt. The only difference was the color. I bought grade 2 which is the easiest to break? That was a nice and shiny metal looking, while the one I took out was a coppery gold color.

 

[Russell King]

The color is simply the plating on the bolt.
Bright silver is zinc
Yellow is a zinc dichromate


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[sagor]

Yes it is a new machine 2017. I looked at the bolt last night and it didn't have any grooves like a typical shear bolt would have. It looked exactly like a 1/4" x 1.5" bolt. The only difference was the color. I bought grade 2 which is the easiest to break? That was a nice and shiny metal looking, while the one I took out was a coppery gold color.

Look at the head of the bolt you took out. No markings on the head is usually grade 2. Three lines, is usually Grade 5. 6 lines on the head is usually grade 8.
Most grade 8 bolts (except the black ones), have that yellow/gold color... Grade 5 are usually just silver in color.

Again, the manual is the best place to check for the specs of that bolt. Next best is to look at the existing bolt and start from there. Not all shear bolts have groves in them, some are just standard bolts at a specific grade.

 

[RCW]

This has been covered in other threads.
Some guys like to make their own, which is cool [emoji41].
Personally, I’ve chosen to buy them straight from the dealer, and keep a small stockpile.
Realized just last week 2 of my 3 shears are original, and I have only replaced left side of the auger several times over 5 winter seasons.

PS- I lied!!! Forgotten I had painted inside of blower last spring, so two still had paint...my apologies.
Still guessing I replace 1 or 2 per season, with a stone driveway.
I’m into OEM ~at $30 for 5 years, and have spares still. Just think it’s expensive, but worth it.

This is my set of 3. Augers (grade 5) are grooved twice, the impeller (grade 8) is grooved once:

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