High Engine Oil Pressure JC89288,0000056 –19–21APR06–1/1 High Engine Oil Pressure Diagnostics Procedure –1/1 Engine Uses Too Much Oil JC89288,0000057 –19–04APR06–1/1 Engine Uses Too Much Oil Diagnostics –1/1 TM2361 (24JUN08) 9010-15-17 450DLC Excavator Operation and Tests 062608 PN=287 Diagnostic Information 4 Oil Pressure Regulating Valve Check Remove and inspect engine oil pressure regulating valve. Is oil pressure regulating valve in good operating condition? YES: Go to Oil Supply System Check. NO: Repair or replace parts as necessary and retest. – – –1/1 5 Oil Supply System Check Remove oil pan and check the following components.
• Pump screen (plugging) • Pickup tube (for cracks) • Engine oil supply pump • Piston oiling jets (faulty or missing) • Main or connecting rod bearing clearances Was problem found? YES: Repair or replace parts as necessary and retest. – – –1/1 9010 15 17 1 Preliminary Checks • Oil viscosity wrong (too thick). • Pressure regulating valve stuck or misadjusted. • Piston cooling oil jets plugged. • Engine oil has antifreeze in it. Was Problem found? YES: Repair or replace parts as necessary and retest. – – –1/1