JD 455 (diesel) snowblower shear bolts


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JD 455 (diesel) snowblower shear bolts

Steve I am always shearing the shear bolt on my snowblower attachment - every time I sue it I shear at least one. My dealer doesn't bat an eye about it, but I wonder, does anyone else have this problem? Any suggestions?
tv4fish You really should NOT be shearing them unless you are hitting something. Are you hitting frozen chunks? They shouldn't be shearing from just blowing snow.
Steve No, that doesn't seem to matter. It shears with light, powdery snow, icy snow, everything.
Tim Boisvert Are you blowing snow on a dirt driveway? Blowing just light fluffy snow doesn't seem correct but I guess I should buy a few once I get my blower on.
tv4fish Steve: If you are shearing bolts while blowing light, powdery snow -- you should find another source for your shear bolts ! Tell your dealer you need some made out of metal and not cardboard!
bontai Joe Have you closely examined the blower for smoothness of rotation (with engine OFF!). Nothing is binding? Are you feeding the snow in at a reasonable uniform pace? Are the 2 parts you are putting the shear pins in, a decent fit to each other? In other words the holes aren't all buggered up allowing the pin to wobble causing wear?
Steve Thanks for all the suggestions. In response: The driveway is paved, not dirt. The blower parts all move smoothly without resistance when the power takeoff has been disconnected and I move it manually. The shear bolt seems to fit tightly into the holes, which line up quite well as long as the takeoff has been disconnected. I have considered trying a different supplier of shear bolts, so maybe I should try online - my dealer is the only one in the area.
Tim Boisvert Steve,

Did you find a better supplier for the sheer bolts?

WEC4104 Another question that might be worth asking is "Are the shear bolts failing when the PTO is first turned on, or while the unit has been running?" If it fails while running, you might want to pull a bolt that has seen some use (before it fails) to see if there is any sign of wear. If it is failing right when you hit the PTO switch, you might try using lower RPMs when you first start it, then gradually ramping up. Justa thought.


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