... pressure: 7Mpa Nominal speed: 800-1800 r/min Nominal displacement: 16/6ml/r Purpose: steering system/ auto leveling system (selective) ... Quantity: 1 Nominal pressure: 21Mpa Nominal speed: 800-2800 r/minNominal displacement: 56/16ml/rPurpose: vibrator motor/ working ... power reserve ensure the reliable power supply.Smooth traveling and steering — individual drive , CCU control.Homogeneous paving layer — ...