Abstract: Apparatus for cleaning clinging residual material from a conveyor belt including a ribbed cleaning roll supported rotatably adjacent to a surface of a conveyor belt to be cleaned by mounting assemblies on opposite sides of the conveyor belt. A drive motor for rotating the ribbed cleaning roll is mounted to one of the mounting assemblies by a motor mount which includes an alignment mechanism for selectively locating the drive motor along three perpendicular axes for movement to coaxially align the motor and the cleaning roll.