Abstract: An apparatus for maintaining equipment, such as an engine, in readiness for use while it is otherwise nonoperational. The equipment or engine is of the general type having two or more closed liquid recirculation systems. The apparatus bypasses the usual recirculating pumps in such systems. External supply pumps remove liquid from separate sumps or reservoirs and divert the liquids from passage through the normal recirculating pumps of the recirculation systems. The diverted liquid is conditioned to a predetermined temperature by passage through a heat exchanger where one liquid warms or cools the other. The liquids, pressurized by operation of the supply pumps, are then redirected into the equipment recirculation systems downstream from the respective outlets of the recirculating pumps. The pressurized and temperature conditioned liquids are then forced through the equipment passages in the respective recirculation systems in a manner similar to normal liquid circulation during use of the equipment.

Abstract: A method and apparatus for maintaining equipment, such as an engine, in readiness for use while it is otherwise nonoperational. The equipment or engine is of the type having a closed liquid recirculation system. The present method and apparatus bypasses the usual recirculating pump in this system. An external supply power removes liquid from the sump or reservoir, and diverts the liquid from passage through the normal recirculating pump of the recirculating system. The diverted liquid is conditioned to a predetermined temperature by passage through a heat exchanger. It is pressurized by operation of the supply pump. It is then directed into the equipment recirculation system downstream from the outlet of the system's recirculating pump. The pressurized and temperature conditioned liquid is then forced through the equipment passages in the recirculation system. This maintains the equipment at a temperature in readiness for use.