Bissell 6596 bagless turbo – minimal suction & burning smell

\015 Machine developed this problem recently. Accompanied by a roaring noise. Problem the same with the hose totally removed. All filters are clean and belt still goes around. Is it possible there is dirt inside the motor assembly itself? If so can this be accessed easily to clean it out? Thanks. Peter\015 – Bissell 6594 PowerForce Bagless Upright Vacuum