DIESEL LUBE OIL COOLING AND PURIFICATION SYSTEM DRAWING FS 430 DESCRIPTION The lubricating oil piping system is shown on FS 430, The arrange- ment shown is typical for diesel units at all stations. The system consists of a built-in lubricating oil pump with a capacity of 60 GPM, oil filter, oil cooler, oil strainer, auxiliary hand oil pump, piping, fittings, thermostats, thermometers, gauges and drain. The oil filling is by hand through an oil filler nozzle located at rear of engine, top of block. The built-in lubricating 011 pump draws oil from the oil pan through a coarse intake strainer and forces it through the cooler and fine strainer into the engine. A small part of the oil from the pump is by-passed through the filter, cooler, strainers and back into the engine. The temperature of the oil is regulated by means of an auto- matic regulator, V-9, which by-passes more or less oil around the cooler. After leaving the cooler, the oil flows into the engine system; the inlet 1s provided with a regulating relief valve V-7 set at 30 psi for by-passing excess oil. Should the built-in lubricating oil pump fail, a hand operated auxiliary lubricating pump is available by opening valves V-3 and V-8. Thus the pump may also be used as a pre-lubrication pump and can be operated for a short time after the engine stops for after-cooling purposes,