. Engine Systems DETROIT DIESEL LUBRlCATlNG SYSTEM The lubricating oil systems schematically illustrated in Figs. 15, 16 and 17 consist of an oil pump, oil cooler, a full-flow oil filter, by-pass valves at the oil cooler and filter and pressure regulator valves at the pump and in the cylinder block main oil gallery. Positive lubrication is ensured at all times by this system. A by-pass oil filter may also be incorporated into the lubricating system at the owner’s option. bearings. The blower drive gear is lubricated from the rear of the blower.
The oil pump on the 6 and 8V engines is driven by a pump drive hub on the front end of the crankshaft and consists of a large and small spur gear meshing in a cavity inside the crankshaft cover. The gear-type oil pump used on the 12 and 16V engines is mounted on the main bearing caps. The pump on the 12V engine is driven from the front end of the crankshaft and on the 16V engine the pump, which is mounted on the No. 9 and 10 main bearing caps, is driven from the rear end of the crankshaft. Oil for lubricating the connecting rod bearings and piston pins and for cooling the piston head is provided through the drilled hole in the crankshaft from the adjacent forward main bearings.
The gear train is lubricated by the overflow of oil from the camshaft pocket through a connecting passage into the flywheel housing. A certain amount of oil spills into the flywheel housing from the camshaft and idler gear The pressure regulator valve, located at the end of a vertical oil gallery in the front of the cylinder block, maintains a stabilized oil pressure. The 16V engine has two pressure regulator valves located at the ends of TO BLOWER FRONT COVER AND OIL COOLER ADAPTOR OIL FILTER BY-PASS VALVE ‘OIL FILTEFADAPTOR I-- OIL COOLER CORE \-OIL PUMP INLET SCREEN OIL FILTER 12312 Fig. 15 - Schematic Diagram of Typical 6V and 8V Lubricating Systems Page 22 j