Abstract: A pneumatic side roll wheel line irrigation system comprising an elongated irrigation pipe supported along the length by a plurality of spaced apart wheels mounted thereon with the pipe serving as an axle for the wheels. A pneumatic side roll mover apparatus is associated with the pipe intermediate the ends thereof for moving the pipe in a sideways direction over the area to be irrigated. The side roll mover apparatus comprises a wheeled frame means which is operatively secured to the pipe for causing the rotation of the pipe whereby the entire length of pipe will be rotated and moved. An air operated hydraulic pump is provided on the wheeled frame and is connected to a hydraulic motor. The drive assembly operatively connects the hydraulic motor to the pipe whereby actuation of the hydraulic motor will cause the rotation of the pipe and will cause the wheeled frame and pipe to be propelled in the sideways direction.