SERIES 60 ON-HIGHWAY ENGINE OPERATOR'S GUIDE * Indicates high crankcase pressure All information subject to change without notice.
111 DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION Abnormal Operating Condition Symptoms and Probable Causes Probable Causes High Lube Oil Consumption Low Oil Pressure Loose connections X — Cracked lines X — Damaged gaskets or seal rings X — * Lube oil loss at breather tube X — * Lube oil loss at dipstick tube X — Leaking oil cooler X — Leaking valve stem seals X — Worn/broken oil control rings X Scored liner and/or piston X — Excessive engine installation angle X — Crankcase overfilled X — Oil in air tanks (air compressor malfunction) X — Plugged crankcase breather X — Oil level low — X Improper engine oil viscosity (fuel in the oil) — X Faulty oil pressure regulator valve — X Worn crankshaft, camshaft or connecting rod bearings — X Missing cup plugs in rocker arm shafts — X Faulty oil pressure relief valve — X Air leaks in oil pump (suction side) — X Worn or damaged oil pump — X Faulty oil pressure gage — X Faulty electrical components (for gage) — X Plugged oil line or orifice — X