User Manual

SERIES 50 OPERATOR'S GUIDE
All hoses in and out of machinery
should b e replaced during m ajor
overhaul and/or after a m aximum of
five (5) years of service.
NOTE:
Fire-resistant fuel and lube oil hose
assemblies do not require automatic
replacement after five years of service
or at major overhaul, but should be
inspected carefully before being put
back into service.
Item 4 – Cooling System
HOT COOLANT
To avoid scalding from the
expulsion of hot coolant, never
remove the cooling system
pressure cap while the engine is
at operating temperature. Wear
adequate protective clothing
(face shield, rubber gloves,
apron, and boots). Remove the
cap slowly to relieve pressure.
The cooling system must be full for
proper operation of the engine.
Coolant Level — Check the coo lant
level daily and maintain it near the
bottom of the filler neck on the
radiator. On some installations this
is done by checking an o verflow
bottle or sight glass. Add coolant as
required, but do not overfill. Before
adding coolant, refer to section How
to Select Coolant in this guide.
Make a daily visual check for
cooling system leaks. Look for an
accumulation of coolant when the
engine is running and when it is
stopped. C oolant leaks may be more
apparent on a engine when it is cold.
Coolant Inhibitors — The
inhibitors in antifreeze solutions must
be replenished with a non-chromate
corrosion inhibitor supplement when
indicated by testing the coolant. In
addition, the engine can be equipped
with a coolant filter/inhibitor system as
an installed option or as an after-sale
item.
All information subject to change without notice. (Rev. 01/04) 67
DDC-SVC-MAN-0058 Copyright © 2004 DE TROIT DIESEL CORPORATION