The top of concrete silo of ready mixed concrete batching plant, we need to vibrate this machine for much times to make it clean. And avoid the air run quickly. The time period for cleaning must be like one week. The negotiability of silo net will have an effect on the pressure motor and efficiency. The wall of screw and conveyor discharge must be cleaned once a week to prevent hard lumps and debris lay a trap and an inadequate material failure. If we haven’t use the cement screw for a long time, we need to make it clear, here we mean the materials. And for the outer ball bearing screw conveyor head office, central office must support bearing grease injection once every four hours (WAM screw machine without greasing), the tail gearbox oil change time for the first 500 hours, later replaced annually a grease (lithium grease No. 00)