With WD-40 or equivalent, spray the four nuts on the underside of the snow blower housing that hold the shave plate to the housing. Also spray the two bolts that hold the shave plate to the side of the housing. Let sit for a few minutes and using a 1/2" box end wrench remove the four nuts on the bottom of the housing. If necessary, apply heat with a torch to loosen. Using a 9/16" box end wrench, remove the nuts on the sides (these also hold the adjustable skid feet). It is recommended that the bottom bolts and nuts be replaced with 5/16-18 X 3/4" long zinc plated carriage bolts using zinc plated washers and ny-lock nuts. It is also recommended that all of th screw threads be coated with an anti- seize lubricant so disassembly at a later date will be easy.
I ordered a replacement chute rotation gearbox. The small metal ball on the end of the cable (on the replacement part) was attached about 1/8" too long and made it so that there was too much play in the trigger that operates it. Thus, the replacement part did not work. I called customer service for directions about returning the part. They said it must have been defective. I'm still waiting for instructions about returning it for a refund. The whole thing was a bust. I ended up disassembling the old gearbox and fixing it, instead of replacing it (which would have been my preference). The replacement part did not work at all!
