Forced-feed lubricating system with oil cooler.

摘要

In a forced-feed lubricating system for feeding oil discharged from an oil pump (1) pneumatically to a lubrication circuit after cooling in an oil cooler (2), the invention comprises connecting an oil inlet of oil cooler (2) and an oil outlet through a by-pass circuit (11,12) and interposing in the by-pass circuit a by-pass valve (13) adapted to open when an oil pressure in the oil cooler drops to a predetermined value or below.