US Patent 10497531 Method and device for coolant recycling

A method for replacing a volume of coolant fluid in a circulating system in diesel engine system that includes the steps of establishing pneumatic connection with at least one location in the diesel engine coolant fluid circulating system; establishing fluid connection with at least one point in the diesel engine coolant fluid circulating system, the fluid connection location being different from the pneumatic connection; and after pneumatic and fluid connection is established, drawing a vacuum pressure through said pneumatic connection and introducing the volume of coolant fluid into the through said fluid connection as well as a device for accomplishing the same.