Heavy Vibration

[TBayOrange]

B2650 with B2714C quick hitch and B2782B snowblower has developed a heavy vibration over the last 2 months. At christmas the inboard bearing carrier failed. I replaced it. For several weeks after we only had light snow, 2 to 6 inches, a few times then cold so no snow. Last week I kind of noticed vibration getting worse, then the mid-PTO shaft seal blew out. repaired that just in time for the 30 inches of snow we had over 2 days. during the clearing I definitely noticed the vibration getting worse. I guess it was worse than I thought cause the cross pieces on the brush guard fatigued and broke off, see picture. I suspect that I have another bearing going?? but don't know which. I'm thinking it has to be from the drive side sprocket back to the PTO because that all rotates at PTO speed, everything after is running at driven sprocket speed. Looking for anybody with experience or thought on this. Thanks

 

[chim]

It shouldn't be difficult to find a piece that's way out of balance. First thing I thought about was someone added "wipers" to the impeller blades and on fell off.

Id disconnect the components at shesr pins and look at them individually if there's nothing obvious.

Bent shaft?

 

[lynnmor]

Check the driveshaft to see if the universal joints are worn. Also check to see if the joints are indexed properly, I don't know if they are keyed to prevent improper indexing.

 

[07wingnut]

Check the drive chain on the speed reduction sprockets. If it is too worn you will be in a world of vibrations and maybe shear pin replacements.

 

[Workerbee]

What Lynnmor said, check if your driveshaft is in phase.