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Fuel
Systems
Equipment Standards
FEDERAL LAW
183.536 - Seals and gaskets in fuel
filters and strainers
(b) Each gasket and each sealed joint
in a fuel filter and strainer must not leak when subjected
for 24 hours to a gasoline that has at least 50 percent
aromatic content at the test pressure marked on the
fuel tank label.
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Fuel is made up of basic petroleum products
in various quantities or concentrations. Depending on the
amount of these components, fuel may have varying effects
on the materials used for gaskets and seals. Fuels with high
aromatic content have been found to damage fuel system components
such as gaskets, seals, hoses and other usually non-metallic
items.
To test gaskets and seals, it is required to
subject samples to gasoline with at least a 50 percent aromatic
content for a period of 24 hours. The described fuel is to
be placed in the filter or strainer at a minimum head of 3-feet.
After the 24-hour period, there shall be no leakage external
to the tested unit.
FIGURE
20 - Seals and Gaskets Leakage Test
TO COMPLY WITH THE LAW
- There is no leakage due to gasket or
seal deterioration when tested to 183.536(b).
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