TM 9--2815--247--34 0004 00--5 THEORY OF OPERATION -- CONTINUED 0004 00 LUBRICATION SYSTEM -- CONTINUED General -- Continued OIL COOLER BYPASS VALVE (THERMOSTATIC) CLOSES AT 148 F OPENS AT 90--125 PSI OIL PRESSURE REGULATOR VALVE ENGINE OIL COOLER OIL PUMP PRESSURE RELIEF VALVE OPENS AT 250 PSI TO CRANKSHAFT BEARINGS AND CONNECTING ROD BEARINGS PISTON COOLING DIRVE HOUSING TO FAN HOUSINGS CLUTCHES AND ACCESSORY TURBOSUPERCHARGER RESERVE COMPARTMENT DAMPER END SCAVENGE COMPARTMENT OIL LEVEL PUMP PRESSURE PUMP SCAVENGE PUMP PRESSURE COMPARTMENT FLYWHEEL END OIL FILTERS 25 MICRON MAIN OIL FILTER BYPASS VALVE 35.6 PSI MAKEUP PUMPS FUEL METERING PUMP Figure 1--8. Engine Oil Flow Control Diagram