Figure 5-12.Swing joint.
The purpose of the O-ring is to prevent leakage
of fuel around the amphonel stud. Sometimes,
due to vibration, the nuts become loose, and
leakage around the stud will occur. If you use a
lock washer and double nut on the stud, you will
lessen the chance that the nuts will back off
because of vibration.
The amphonel stud is connected inside the swing
joint to a spider assembly. The spiders inside the hose
reel are connected from the swing joint by direct
contact of spider to spider. The other spiders inside the
drum area are connected by a hard wire.
The spider assembly in the male end of the hose
reel (where the hose attaches) connects directly with
the spider assembly in the female end of the fuel hose.
Each end of the fuel hose has a spider assembly in-
Aviation fuel hoses are designed to pressure re-
fuel aircraft quickly and safely. There are three types
and sizes the ABF will typically use:
2 1/2-inch collapsible, used for refueling aircraft
2 1/2-inch non-collapsible, used for defueling
1 1/2-inch non-collapsible, used for defueling
aircraft, boat fill, tractor fill, etc.
Hoses on fueling stations that are used for
defueling may be also used for fueling providing
they are properly flushed.
All hoses come in standard 50-foot lengths or 100-
foot bulk lengths. The 50-foot lengths come as a
complete assembly. The 100-foot lengths are hose