I took the driveshaft on my QA-42 blower off and discovered that it seems to be frozen - doesn't slide. I think its supposed to telescope in and out when you raise or lower the blower. I think that being frozen puts a lot of axial stress on the needle bearings in the sprocket mounting bracket. That's why I had to replace them too. Tried freeing it up with PB Blaster then pounding on the outer sleeve with a brass drift but can't move it. Anybody run into this problem and have a solution? Also there is a retainer cap that keeps a cork seal in place. Any idea where I can find the cork seal? I suspect water got past the seal and rusted up the driveshaft sliding feature. There's a zerk fitting to pump grease in but previous owner must not have greased it - that's why it's frozen I think.