670A - GRADER, MOTOR OIL COOLER 0419 Parts group OIL COOLER 0419 OIL COOLER 0419 . ENGINE OIL COOLER AND OIL COOLER LINES (ENGINE SERIAL NO. 459478-621172) (MANUFACTURED 1978-1983) (E ENGINE OIL PRESSURE REGULATING VALVE [01G22]