SERIES 40 ENGINE OPERATOR'S GUIDE
NOTICE:
Starting an engine taken out of
storage or one recently overhauled
without first priming the fuel system
will result in an overload condition
that can damage the injector tips.
To avoid injector tip damage, the
fuel system must be primed before
initial engine startup.
If the engine is equipped with a
fuel/water separator, drain off any
water that has accumulated. Water
in fuel can seriously affect engine
performance and may cause engine
damage. Detroit Diesel recommends
installation of a fuel/water separator
wherever water contamination is a
concern.
If previously disconnected, reconnect
charge air cooler piping to valve
cover/intake manifold.
To insure prompt starting, even
running and avoid injector tip damage,
the fuel system
must
be primed before
initial engine start. Use this procedure:
NOTE:
Authorized Detroit Diesel service
outlets are properly equipped and
have the trained technicians to perform
this service.
NOTICE:
Failure to disconnect the CMP
(camshaft position sensor) before
priming the engine may allow the
engine to start during priming,
which could result in severe engine
damage.
1. Disconnect the CMP (camshaft
position sensor) to prevent the
engine from starting.
2. Using the manual priming pump
on the fuel
fi
lter header,
fi
ll the
system with clean fuel until the
primer pump is hard to depress.
3. Crank the engine three times for
15 seconds each. Reapply the
primer pump after each crank
cycle.
4. Once the primer pump is hard to
depress (usually three crank and
hand prime cycles), reconnect the
CMP.
Other Checks
Check the hydrometer “eye” of
maintenance-free batteries for charge.
See Figure 9.
All information subject to change without notice.
(Rev. May 2004)
21
DDC-SVC-MAN-0057 0305
Copyright © 2003 DETROIT DIESEL CORPORATION
