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Fuel
Systems
Manufacturer Requirements
FEDERAL LAW
183.560 - Hoses clamps: Installation
Each hose clamp on a hose from the fuel
tank to the fuel inlet connection on the engine, a hose
between the fuel pump and the carburetor, or a vent
line must:
(d) Not depend solely on the spring tension
of the clamp for compressive force. |
This requirement does not apply to a tube used
to detect fuel pump diaphragm failure.
Hose clamps are available that use different
means for securing the hose to the hose fitting, pipe or spud.
(a) Mechanical
Tightening: This type employs
a screw or bolt to apply pressure to the connection. A screwdriver,
pliers or wrench is used to adjust the hose clamp depending
on the adjustment configuration. These clamps are reusable.
NOTE:
Wire type hose clamps are
not acceptable.
(b) Deformation
of the Clamp Material: This type
usually depends on the use of a special tool for installation.
The clamp material is bent or formed in such a manner as
to apply pressure to the hose thereby securing the hose
connection. Generally this type of clamp is not reusable
and may be difficult to tighten in the event of a leak.
This style of clamp requires a specific tool for correct
application. Since technicians in the field will not have
access to these tools, these clamps should not be used on
connections where routine disconnection for servicing may
be required.
(c) Spring
Type: This type is prohibited.
The compressive force depends on the clamp material and
there is no positive mechanical type of fastening.
TO COMPLY WITH THE LAW
- Do hose clamps rely on a means of tightening
other than spring tension of the clamp?
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FIGURE
28 - Hose Clamp Types
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