Snowthrower vibration question

[608KEB 796]

I noticed that my snowthrower 86-42ST01 vibrates some. I replaced all 4 bearings and put a cast iron pulley on it last fall. I would have thought that's just how the snowthrowers are. But I have another snowthrower at the farm I use. It has no vibration at all. It runs smooth as silk! Looking for a few tips to solve this issue

Edited January 26, 2014 by 608KEB

[Kelly 1,033]

Make sure there are no bent shafts, or the auger is not running true.

[608KEB 796]

I'll look at the shaft. I wasn't sure but now that you mention that.The drive shaft may have a slight wobble to it. I replaced the drive shaft pulley, because I thought the old one wobbled. The new bearings helped quite a bit. Would I take the shaft off and roll it on a smooth surface to see if it is straight?

Edited January 26, 2014 by 608KEB

[chazm 413]

I'll look at the shaft. I wasn't sure but now that you mention that.The drive shaft may have a slight wobble to it. I replaced the drive shaft pulley, because I thought the old one wobbled. The new bearings helped quite a bit. Would I take the shaft off and roll it on a smooth surface to see if it is straight?

 

Yep, you got the right idea

[608KEB 796]

 I should have read through a few more posts. I didn't realize that the shaft could be bent that easy with a rock. I didn't even think of that as a possibility as to why the shaft was bent. Thanks

[Hydro 131]

They boosted the newer models to a 7/8" shaft diameter maybe that is why.  My 94 need a drive pulley, chain shaft bearings and idlers.  The auger bearings were good. No wobble or vibration but I can tell after several hours of running everything has to be true or else.

[608KEB 796]

Well I solved the problem. I changed the auger out and no more vibration!