CDM5xxB/A is a mechanically driven and single drum roller. “xx” is the weight of the machine (ton). Currently available model is CDM514B, CDM516B, CDM518A, CDM520A and CDM522A. 1.CDM514B and CDM516B uses one frequency, two amplitude and open-looped hydraulic vibration system with Permco hydraulic components 2.CDM518A, CDM520A and CDM522A uses one frequency, two amplitude and close-looped hydraulic vibration system with Rexroth hydraulic components 3.The drum is made of high strength material which is wear-resistant and impress-resistant 4.Wide-view cab and tiltable steering column are designed with ergonomics 5.Both hand brake and foot brake are available for the safety 6.Engine hood is opened with manually operated oil cylinder for easy maintenance 7.Air conditioning and heating system provide better environment for operator