How To Replace The Fuel Filter And Strainer - Detroit Diesel 92 Series Operator's Manual

The use of supplemental fuel addi-
tives does not necessarily void the
engine warranty. However, repair
expenses which result from fuel
system or engine component mal-
functions or damage attributed to
their use will not be covered. These
products should be accompanied with
performance data supporting their
merit. It is not the policy of Detroit
Diesel Corporation to test, evaluate,
approve, or endorse such products.
Some fuel additives provide tempo-
rary benefits but do not replace good
fuel handling practices. Such additives
are helpful when water contamination
is suspected:
• Isopropyl Alcohol - 1 pint per 125
gallons of fuel for winter freeze-up
protection.
• Biocide - For treatment of microbe
growth or "black slime." Follow man-
ufacturers' instructions for treatment.
Prohibited Additives
The following additives are NOT
allowed and MUST NOT be mixed
with diesel fuel:
Used Lubricating Oil—Detroit
Diesel specifically prohibits the
use of drained lubricating oil in
diesel fuel. Used lubricating oil
contains combustion acids and
particulate materials which severe-
ly erode injector components,
resulting in loss of power and
increased exhaust emissions. In
addition, the use of drained lubri-
cating oil will increase mainte-
nance requirements due to filter
plugging and combustion
deposits.
Gasoline—
CAUTION:
The addition of gasoline to diesel
fuel will create a serious fire hazard.
The presence of gasoline in diesel
fuel will reduce fuel cetane number
and increase combustion tempera-
tures. Tanks which contain such
mixtures should be drained and
cleaned as soon as possible.
Detroit Diesel Corporation will not
be responsible for any detrimental
effects which it determines resulted
from adding used engine oil or gaso-
line to the diesel fuel.
For more detailed information on fuel
requirements, refer to "Engine Require-
ments—Lubricating Oil, Fuel, and
Filters" (7SE270), available from autho-
rized Detroit Diesel service outlets.
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CAUTION:
When the temperature of diesel
fuel is elevated, as occurs when
the fuel is circulated through an
operating engine, it may pose the
following hazards which should be
guarded against.
• Heated liquid fuel may cause
scalding if allowed to come in
contact with the skin.
• Heated diesel fuel can form com-
bustible vapor mixtures in the
area around the fuel source.
The following precautions should
be taken to minimize the possibili-
ty of injuries from heated diesel
fuel.
1. Whenever possible, it is recom-
mended that the engine and fuel
be given an opportunity to cool
down to ambient temperature
before performing service oper-
ations which could result in the
spillage of fuel from the engine
or vehicle fuel system. When
this is not possible, protective
clothing (face shield, insulated
gloves, apron) should be worn
when performing these opera-
tions.
2. Keep open flames, sparks or
other potential ignition sources
away and do not smoke during
vehicle refueling and service
operations which could result in
the escape of liquid or vapor-
ized diesel fuel.
3. Engine or vehicle fuel systems
service operations should be
performed in a well ventilated
area that is kept free of
bystanders.
E. How to Replace the
Fuel Filter and Strainer
Filters are an integral part of the fuel
system. Proper filter selection and
maintenance are important to satis-
factory engine operation and service
life. Filters should be used to main-
tain a clean system, not to clean up
a contaminated system. Refer to
Specifications (page 73) for proper
filter selection.
Series 92 engines use spin-on
type fuel filters. The spin-on filter
consists of a shell, element, and gas-
ket unitized into a single cartridge
and a strainer or filter cover which
includes a threaded sleeve to accept
the spin-on filter cartridge.
Replace Spin-on Type Filter
Element
Typical Spin-On Type Fuel Filter or Strainer
1. With the engine shut down, place
a suitable container under the
strainer or filter and unscrew the
cartridge. Dispose of the car-
tridge in an environmentally
responsible manner according to
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