User Manual

SERIES 50 OPERATOR'S GUIDE
Crankcase – Iftheengineoilwas
replaced, stop the engine after normal
operating temperature has been
reached. Allow the oil to drain
back into the crankcase for about
twenty minutes, then check the oil
level. If necessary, add oil to bring
the level to the proper m ark on the
dipstick. Use only the heavy-duty oils
recommended. Refer to the How to
Select Lubricating Oil section in this
guide.
Turbocharger – Makeavisual
inspection of the turbocharger for
oil leaks, exhaust leaks, excessive
noise or vibration. Stop the engine
immediately if a leak or unusual noise
or vibration is noted. Do not restart
the engine until the cause o f the
concern has been investigated and
corrected. Authorized Detroit Diesel
service outlets are properly equipped
to perform this service.
Avoid Unnecessary Idling
Whenever possible, avoid unnecessary
idling.
During long engine idling periods
with the transmission in ne utr a l, the
engine coolant temperature may fall
below the normal operating range.
The incomplete combustion of fuel
in a cold engine will cause crankcase
oil dilution, formatio n of lacquer or
gummy deposits on the valves, pistons,
and rings, and rapid accumulation of
sludge in the engine. When prolonged
idling is necessary, maintain at least
850 rpm spring/summer and 1200 rpm
fall/winter.
Stopping the Eng ine
Stop an engine under normal operating
conditions as follows:
1. Reduce engine speed to idle and
put all shift levers in the neutral
position.
NOTICE:
Stopping a turbocharged engine
immediately afte r high-speed
operation without allowing a
sufficient cool-down period may
cause dama ge to the turb ocha rger,
as it will continue to turn without an
oil s upply to the bearings.
2. Allow th e engine to run between
idle and 1000 rpm with no load
for four or five minutes. Th is
allows the engine to cool and
permits the turbocharger to slow
down. After four or five minutes,
shut do wn the engine.
All information subject to change without notice. (Rev. 01/04) 21
DDC-SVC-MAN-0058 Copyright © 2004 DE TROIT DIESEL CORPORATION