I have the plow attachment that uses the same frame mount as the snowblower. When I changed from the blower to the plow I did not remove the driveshaft. I must have hit something hard enough to bend the driveshaft. A hard learned lesson. Remove the driveshaft when using the plow.
Your plow quick-connects the same way as the snow blower, correct? If it's using the same sub-frame as the blower to mount, how do you remove the driveshaft for the plow? That driveshaft that's part of the subframe, with 2 pillow block bearings and the 4 set screws 2 in each. That got bent?
Or is the driveshaft you're referring to the 2 piece PTO shaft that connects that subframe shaft to the snow blower, that has a rear locking u-joint slide-on connector on one half to attach to the subframe shaft, and that shaft's front half is splined and bolted to the snow blower?
Asking because that front 2-piece PTO shaft on my B2650 snowblower (B2782B), same as yours, had the front bolt that pins it onto the blower input shaft disappear along with its 1/4" square spline and come completely loose, only to be held in place by that small chain across its bottom. It would have flown apart quite violently at 2500 rpm without that chain cradle keeping it from falling.
Check your pto shaft u-joint-to-blower connection. There's a set screw for the spline, and a 1/4" bolt through the shaft keeping it there. Make sure it's still firmly attached!
But I can't see how the sub-frame permanent shaft got bent from the plow attached to the frame. There's nothing connecting a plow to it. Hell, I've hit some hidden stumps pretty hard with my blower multiple times bringing me to a jolting stop and never has that shaft or any shaft been affected in any way.
But if that front PTO shaft mount came loose, that could cause some damage!
