BCS snowblower

jerzeemaple · Dec 3, 2017

I知 trying to replace the broken shear pins on my used/ new to me/ BCS snowblower (post 1995 spline shaft) . Right side is simple, pin is simple the drive shaft sheer pin hole and turbine hole align perfectly and not a problem it痴 the left side turbine that is a problem. The pin is sheared already, however, the shaft and turbine turn as if the pin is present but no pin is visible. I pulled gear box off and sprayed solvent down the center of turbine to free any corrosion. It appears that the broken shear pin is preventing me from being able to get the turbine off of the shaft, there is a little slop and the shaft and turbine can move 1/8 or so along the shaft horizontally and up and down 1/8 spinning on the shaft and thats it, so I know they are not fused with corrosion. I cannot get the turbine off whatsoever and would definitely appreciate any thoughts or suggestions on this. Thanks

Code54 · Dec 3, 2017

Can you get us a few photos?
ON my 3pt Post hole digger the other day I sheared the pin and it was slightly twisted in the hole. Then the outer shaft got out of alignment. Ended up having to lock my pro shaft and get a pipe wrench and turn the outer shaft. Eventually got it all realigned and the old pinout. Was a big pain. Basically the shear pin had a little nipple and was just enough to bind things up once the outer shaft spun a bit.
Hope this makes sense - basically the pin is sheared and still inside and the outer shaft spins out of alignment a bit

jerzeemaple · Dec 4, 2017

I’m almost certain that is exactly what is going on here CODE54, i’m going to try something similar to what you did, sounds exactly like what you described
Thanks

Code54 · Dec 4, 2017

I hope I helped and good luck on getting them pulled a part, it can be a pain. Sometimes heat or some penetrating oil will help.

NibbanaFarm · Dec 10, 2017

If it's mounted on the tractor, then with the engine off and pto engaged the gearbox and auger shaft shouldn't rotate. So you should be able to spin the auger with your hand to line up the hole with the shear pin and use a punch to drive it out. If it's really tight and you can't turn it with your hand, get a twobyfour in there and turn it with that.