Sears Kenmore Three Speed Heavy Duty shampooer-Polisher

by Mary
(Oshhkosh, WI)

I have the above listed appliance since about the 60's, I would imagine. It is like an upright vacuum and is aqua and white in color. It holds 120 ounces of shampoo solution. It also says 12 and 40. I have 2 sets of brushes and one set of polishers, but cannot figure out how to get the brushes off to change them. Any ideas would be appreciated. I have tried pulling and anything else, but they do not come off. It is probably a simple procedure that I cannot figure out.