The drive unit design for each KEITH Storage & Conveying system is as unique as the project itself. KEITH has designed systems to move loads of several hundred pounds to more than 1,400 tons. Sizes of the hydraulic drives vary, depending upon the capacity of the system. Multiple hydraulic drives are required for larger bins. A minimum 3’ clearance is required under the bin for maintenance access. This can be achieved by pit mounting the bin or by installing an inverted drive unit.