A sugarcane harvester including a base cutter configured to cut sugarcane from a field and a feed roller chassis, disposed adjacently to the base cutter, configured to receive the cut sugarcane. A plurality of feed roller assemblies are supported by the feed roller chassis, wherein each of the plurality of feed roller assemblies includes a roller body defining a roller body cavity, a motor support located within the roller body cavity, the motor support defining a support cavity, and a bearingless hydraulic motor disposed within the support cavity. The bearingless hydraulic motor includes a spindle extending from the motor and through the support cavity. A spindle adapter is releasably coupled to the spindle and fixedly coupled to the roller body. A roller bearing, disposed within the support cavity, includes an inner surface in contact with the spindle adapter, wherein rotation of the spindle rotates the roller body while the bearingless motor remains stationary with respect to the motor support.