Figure 1-18.-Catalytic converter.
NOTE: The cetane number is a measure of the
ability of a diesel fuel to provide fast spontaneous
combustion with short ignition delay. A knock in a diesel
engine is caused by the fuel igniting too slowly.
You may be deployed to some sites at which diesel
fuel is not available and JET FUEL has to be used. The
three major types of jet fuel used by the military are JP-4,
JET-A1, and JP-5. DO NOT USE JP-4 IN ANY
DIESEL ENGINE. The maintenance supervisor
approves the use of JET-A1 and JP-5 and directs the
amount of engine oil that must be added to the jet fuel.
This must be done to improve the lubricating qualities
that prevent the injector pump and injectors from
Fuel filters trap foreign material that may be present
in the fuel and prevent it from entering the carburetor or
sensitive fuel injection components.
Gasoline Fuel Filter
On a gasoline engine system there is at least one fuel
filter used in the fuel system and it can be located in any
accessible place along the fuel delivery line. Filters also
can be located inside fuel tanks, carburetors, and fuel
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