Abstract: A machine for scrubbing the sidewalls of tires on motor vehicles in automatic car washing facilities has a swing frame presenting a track for a carriage on which is mounted a pickup roller to be engaged by the tread face of a tire, a rotary scrub brush arranged to engage only the sidewall of the tire, and a brush contact limiting roller also arranged to engage the sidewall. The rotary axis of the brush is tilted so that the brush operates in the forward lower quadrant of the tire sidewall.

Abstract: A vehicle conveyor is provided with an upper wheel engaging active track and a lower inactive track. Rollers can be moved up by a roller up guide into the active track to engage the wheel of a vehicle for moving the vehicle along a path. The length of the conveyor is reduced by providing a roller down guide which can remove a roller from the active track along the length of the conveyor and by cycling the rollers such that the first roller on the active track engages the front wheel of a vehicle until the rear wheel of the vehicle is beyond the roller up guide, then an additional roller is raised to the active track behind the rear wheel of the vehicle and the first active roller is removed from the active track. Consequently, the vehicle is first moved by engagement by its front wheel and subsequently moved by engagement with its rear wheel to reduce the length of the conveyor.