
HOW-TO SECTION
Detroit Diesel Corporation will not be
responsible for any detrimental effects
it determines resulted from adding
drained lubricating oil or gasoline to
the diesel fuel.
E. How to Replace the Fuel
Filter
Filters are an integral part of the
fuel system. Proper
fi
lter selection
and maintenance are important to
satisfactory engine operation and
service life. Filters should be used to
maintain a clean system, not to clean
up a contaminated system. Refer
to the
Specifications
section of this
guide for proper
fi
lter selection.
A reusable, cylindrical, woven nylon
primary fuel strainer element and
replaceable spin-on type secondary
fuel
fi
lter element are used on Series
40 engines. The strainer consists of
a cylindrical, woven nylon element
that installs onto the strainer header
and is protected by a screw-on plastic
body with a replaceable seal ring.
See Figure 25.
The spin-on secondary
fi
lter consists
of a shell, element and gasket unitized
into a single cartridge and a
fi
lter
adaptor header which includes
threaded inserts to accept the spin-on
cartridge. The header also includes a
fuel priming pump and air bleed screw
for manual priming of the system after
fi
lter replacement.See Figure 25.
NOTE:
An optional fuel/water separator may
be installed in the system piping ahead
of the fuel strainer.
Replace Fuel Filter and Strainer
To avoid injury from hot surfaces,
allow engine to cool before
removing any component. Wear
protective gloves.
Replace spin-on fuel
fi
lter element
and strainer as follows:
1. Shut down the engine and allow
it to cool.
2. With the engine at ambient
temperature and cool to the touch,
place a suitable container under
the
fi
lter.
3. A fuel shutoff valve may be
installed on the discharge side
of the fuel
fi
lter adaptor head.
If installed, turn the handle on
the shutoff valve to the
closed
position (perpendicular to the
valve).
4. Using a suitable band type
fi
lter wrench, remove the
fuel
fi
lter. Dispose of the
fi
lter in an environmentally
responsible manner, according
80
All information subject to change without notice.
(Rev. May 2004)
DDC-SVC-MAN-0057 0305
Copyright © 2003 DETROIT DIESEL CORPORATION