Re: Snapping snowblower sheer Pins

Posted by Bob - MI on December 10, 2004 at 06:11:45 from (66.14.205.20):

In Reply to: Snapping snowblower sheer Pins posted by Snow and lots of it on December 09, 2004 at 18:29:58:

I would agree with the trouble shooting suggested to determine if there is excessive drag somewhere.

After that however I am suspicious about a burr or some other issue in the shaft and coupling that the pin goes through. The pin is supposed to be the weakest link in the chain and sacrifice itself before the driveline gets all torn up. That means that the pin is made from a softer alloy that "shears" easier than the rest. If pins are being eaten up suddenly there must be something that is accelerating the coupling"s ability to slice the pin in two.

Pull the shaft/coupling apart and inspect the holes for burrs and/or elongation. If one of the holes is elongated it will cause the joint to rock back and forth and that will accelerate the shear. A new pin should fit closely in each of the holes. If it"s wobbly that part would be a candidate for rework/replacement. Worn shaft to coupling interface would allow too much slop also. I would look at that too. A burr in the hole will scar the pin as it passes through and it should be visible. I would not continue with the nails. They can make matters worse and defeat the safety intent of the pin and tear up the drive. I live in Michigan and can relate to how badly you need this running right now.

Best of luck

Follow Ups:

• Re: Snapping snowblower sheer Pins Willy-N 06:49:49 12/10/04 (0)

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