New Rear Steer Chassis from Schwing - No Limits 2007

Schwing America Inc, the first manufacturer to provide a driven, steering axle on a concrete pump, has developed a proprietary rear steer system which it has applied to a Mack truck chassis. The new Schwing Rear Steer System (SRS) simplifies the process of allowing a driving rear axle to steer, which enables a tighter turning radius and less maintenance for their S 58SX and S 61SX model concrete pumps. “Our rear steer system is an engineered solution that utilizes a mechanically linked, hydraulically assisted solution for long wheel base concrete pumps that benefit from improved maneuverability,” explains Tom O’Malley, Division Director of Boom Pumps at Schwing America. “Unlike other systems that require electronic feedback, the Schwing system has no limits to the turning radius or the speed at which it works.” In addition to providing a more reliable rear steering axle, the new system maintains the alignment of the rear axle and eliminates the play that is inevitable with more complicated systems. With SRS there is no need to manually reduce the amount of steering in the rear axles.

The Mack chassis with SRS has been tested and meets or exceeds braking regulations set by Federal Motor Vehicle Safety Standard 121. The outside turning radius for the SRS measures an industry leading 56’ 3”, according to O’Malley. In addition, having the rearmost axle drive and steer is critical when backing out of jobsites. Free from delays that come with electronic feedback, the SRS will always give the full pull.