Big Green Egg Blueprints How To Open A Power Unit For Bissell Big Green Clean Machine? 4 Unconventional Deep Well Fasteners..big Pain.?

How to open a power unit for Bissell Big Green Clean Machine? 4 unconventional deep well fasteners..big pain.? - big green egg blueprints

My Bissell Big Green Clean Machine 10 years. Engine low suction is still standing. The pipes are clear, although rpm. There are no leaks anywhere. I think the rotor in May as a lack of fiber or dog hair. How stupid to open the drive unit? There are 4 holes in the plastic module, gray, deep sources with the customer needs to ensure that the poor open very hard to do to "service" in a lot of money. Shining a flashlight into a hole, I see something "metal" as a dud .. no slot or Phillips head screws, Allen, etc. Hexagon. How to open the unit of energy? I do not want to pay more than $ 35 to clean the dog hair clo driver.