Recirculating lubrication is used on different types of machines. In essence the oil is siphoned from the sump, pressurized and put into other places to be used. Some of the points with the pump that are being lubricated are the bearings and gears. You can mount the pump right on the sump oil machine, have the pump on the outside of machine and the sump on the inside of he machine or putting both the pump and sump on the outside in a different place that is kind of hidden away. Just making sure that all the lines lead to the parts that need lubricating.
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