Product Overview This hydraulic main control valve, part number 340-3466, is the primary hydraulic distribution unit specifically engineered for the hydraulic system of M315 and M313D wheel excavators. It distributes high-pressure hydraulic oil to control the boom, arm, bucket, travel, and swing movements. Featuring a multi-channel valve block structure, precisely matched spools, wear-resistant alloy materials, and precision machining, it offers direct replacement installatio