Makes me wonder how "enclosed and sealed" this compartment is. On various types of motors there is actually an access hole that allows you to change out the bru

Makes me wonder how "enclosed and sealed" this compartment is. On various types of motors there is actually an access hole that allows you to change out the brushes. If I was evil I would just seal up that huge motor, weld it shut and never allow the brushes to be swapped out, but I'd put a check engine light when the brushes start to wear down so that the customer has to buy a whole new motor.