Hydraulic Dock Levelers use a push button control to operate the dock leveler. When the button is pushed, an electric motor starts and a hydraulic cylinder is used to raise the platform. A second hydraulic cylinder extends the lip assembly. When the dock attendant releases the control button, the dock leveler automatically lowers into position on the truck bed.
Air Powered Dock Levelers, though structurally the same, use a push button control station to operate a 115/1/60 pneumatic blower to inflate an air bladder. This in turn, raises the dock leveler platform. A mechanical assembly operates the hinged lip. Once the lip is actuated and fully extended, the dock attendant releases the control button and the dock leveler automatically lowers into position on the truck bed.
Air Powered Dock Levelers are more cost effective at time of purchase.
Hydraulic Dock Levelers cost more to purchase but they require less maintenance and offer more safety features.
Contact a Pentalift Sales Representative for more information.