... drive Certification:CE Hydraulic double drive and single drum vibratory rollers 12tonsHydrostatic rear wheel drive, CVT, hydraulic vibration with dual amplitude ... , hydraulic articulated steering, special driving axle;driving and vibration system:imported SAUER or REXROTH piston-pump andmotor, and high-pressure ... Cummins 6BT5.9 Hydraulic double drive and single drum vibratory rollers 12tons