User Manual

SERIES 50 OPERATOR'S GUIDE
replacing the engine lubricating oil
and filters after extended storage.
NOTICE:
Failure to elimin ate water-diluted
lubricating oil may l ead to serious
engine damage at startup.
Fuel System Checks
Fill the tanks with the recommended
fuel. Keeping tanks full reduces water
condensation and helps keep fuel
cool, w hich is im po rtant to engine
performance. Full tanks also reduce
the chan ce for microbe (black slime)
growth. For fuel recommendations,
refer to the How to Select Fuel Oil
section in this guide. Make sure the
fuel shutoff valve (if used) is open.
To insure prom pt starting and even
running, the fuel system must
be primed if air has entered the fuel
system. Priming is done by connectin g
a manual or electric priming pump
to the secondary fuel filter adaptor.
Authorized Detroit Diesel service
outlets are properly e q uip ped and have
the trained technicians to perform this
service.
Priming is not normally required if
the filter elem e nts are filled with clean
fuel when installed and the manifolds
are n ot drained of fuel.
NOTICE:
Prolonged use of the starting motor
and engine fuel pump to prime the
fuel system can result in damage to
the starter, fuel pump and injectors
and may cause erratic engine
operation due to the amount of air
in the lines and filters from the fuel
supply tank to the cylinder head.
Engines equipped with s tarting
devices dependent on compressed
air or gas reservoirs should always
be primed before initial startup.
Otherwise, reserve pressure can
be exhausted and injectors may be
damaged from lack of lubrication
and cooling.
Under no circumstances sh o uld
a starting aid such as ether be
used to run the engine until the
fuel system is primed. Injector
damage will result if this method
is used. The heat generated b y the
external fuel source will cause the
injector tips to be da maged when
the fuel cools them. The injector
plunger and bushing can be scored
from running without lubrication.
All information subject to change without notice. (Rev. 01/04) 17
DDC-SVC-MAN-0058 Copyright © 2004 DE TROIT DIESEL CORPORATION