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Message: <blockquote data-quote="thetool" data-source="post: 15274" data-attributes="member: 1534">I believe you do have to remove the tank.You have to loosen and tip, if not fullly remove, the entire blower housing.  There are four long 3/8" bolts that go through long spacers, they bolt almost straight up.This releases the plate with the gearbox and fan.  The fan is on a tapered, keyed shaft with a nut on top.  If your build was kind, there are two 1/4" threaded holes in the fan hub and you can use a steering wheel puller to remove the fan.  If you don't have the holes, I used two equal size tapered slipper bars, one on each side, driven in sideways between the hub and plate, and alternately tapped with a hammer until the fan popped off.  Sometimes it broke, but the replacement fan has the holes for a puller.Then the gearbox is unbolted from the plate.  The cheesey stamped pulley is easy to damage so be careful when removing that.  That's a straight keyed shaft with socket setscrews, but it likes to sieze on the shaft.Reverse for install, but the long bolts with spacers are a special treat---two spacers go inside the housing.  There are pockets for them--it should go well if your blower housing is not all distorted from heat, and sometimes the holes are hard to find--sounds like my life=).Good luck with this.</blockquote>