I suspect that where the blower fan joins the shaft driving it that you have a sheared key. Maybe a long 5/16" of 3/8" square key or maybe one or more Woodruff keys in line.
I have an Allied 8' blower 1990 vintage that had some oak firewood run through the blower (damm lying customer) and bent the 'ell out of it. With a bit of torch work and some welding, we put it back to work blowing snow in about 3 hours. It will still throw snow in a serious manner. I think the Lorenz is a tougher blower than my Allied.
Does this Lorenz have a 3 shaft gear box ahead of the fan? If so, there may be a sheared key under a gear inside of the gear box.
Another possibility is that the PTO engagement of the Oliver is slipping. If it is engaged with a hydraulic pressure on a PTO band (like the Fords do) then that is a possibility.
Because of the huge cost of the blower and the necessary hydraulic motor drive, I would not buy a blower for the Bobcat. Unless you can keep the Bobcat in a heated garage or shed, the cold starts on the Bobcat can eat up the hydrostats and main hydraulic pump. Besides, if you get the Bobcat sliding around on the ice they have no steering control. When you get stuck in the field in mud, you can "bucket" yourself out. When you have the snowblower attached, you are in deep doo-doo. Besides the bobcat has so little ground clearance you can easily hang it up on hard snow. I speak from experience on this, I have 2 plow trucks w/8' blades, 2 130 Hp tractors powering 8' 2 stage blowers, one 105 hp tractor w/front and rear 9' blades and a 975 Bobcat with 9 ft snow bucket. I only use the bobcat when I have to load snow into trucks to haul it out. The bobcat is just too slow for longer or wider drives. The bobcat has the highest maintanence costs per hour of any of the above equipment.
BTW, if you do buy the bobcat snowblower, check to see if your bob is equipped with the high flow hydraulic circuit first.
Your cheapest solution is to fix your Lorenz or your Oliver. But it is your $$$$ to do as you want.
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