MULTIS HYDRO MJ862 is specially designed for boring machines. It is composed of the two circuits respectively for the hydraulic fluid and coolant, and these fluids don’t mix in case of the leak for their structure. The hydraulic-pressure circuit is designed to guarantee the stable longevity even in high-speed work as we applied a special structure to it without packing and to eliminate the problems caused by abrasion. The coolant circuit is balance designed and specially structured to avoid the damage on the seal face caused by initial Dry-Running.