User Manual

SERIES 50 OPERATOR'S GUIDE
Abnormal Operating Condition Symptoms and Probable Causes
Probable Causes
High
Lubricating 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 over filled
X
Oil in air tanks (air compressor
malfunction)
X
Plugged c rankcase breather
X
Oil level low
X
Improper engine oil viscosity (fu el
in the oil)
X
Faulty oil pressure regulator o r
relief valve
X
Worn crankshaft, camshaft or
connecting rod bearings
X
Missing cup plugs in rocker arm
shafts
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
* Indicates high crankcase pressure
All information subject to change without notice. (Rev. 01/04) 119
DDC-SVC-MAN-0058 Copyright © 2004 DE TROIT DIESEL CORPORATION