Hi all. Last year I purchased a late 1970's S16 tractor with a cab, weight box, chains, and a 48" two stage ariens sno thro attachment. I LOVE IT!! Last week we got some nasty ice followed by a snowstorm. I ended up hitting a huge hunk of ice that was hidden in the snow, resulting in my brass gear and/or worm gear stripping. My own fault....did not realize the previous owner had put hardened bolts in instead of shear pins. Anyway, this is my first front mount blower and my first ariens. I am a little overwhelmed as to where to start as far as dismantling so that I can get to gearbox. I believe my model is either the 831010 or the 831009....not really sure of the difference? I checked out the manuals at the apache ariens website. It will be helpful once I need to order parts, but as of now I just need to get the darn thing apart. I have the attachment off of tractor. I pulled off belt cover and removed the belts. I have also taken the pto coupler and bracket off of the shaft. Now what? I know I have to get both pullies off so that I can bring the impellar out the front. Does the pulley just slide off the end of the shaft? I am pretty mechanically inclined, but I will admit I am a little overwhelmed. I just want to make sure I do it right. ANY advice would be helpful, or even better, step by step instructions would be GREAT! I have searched the web and am not having much luck finding any help. Thank you in advance!