Electric Power Hydraulic Brake for Crane 1.Mode :YWZ/YWZ4 IntroductionYWZ series electric hydraulic block brake, MYT1 series driver ... of two parts. When you power up, power hydraulic driving device, push rod rises rapidly, and by ... open brake (pine gate) when power failure, power hydraulic push rod under spring force, declined rapidly, and ... AC power 380V,50Hz. Electric power hydraulic brake for crane