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Miscellaneous Fasteners - 14018_67
Flexible line coupling

Aviation Structural Mechanic (H&S) 3&2 - How airplanes are built and how to maintain them
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Some of the most commonly used plain-band couplings are shown in figure 2-13. When you install a hose between two duct sections, the gap between the duct ends should be a minimum of 1/8 of an inch and a maximum of 3/4 of an inch. When you install the clamps on the connection, the clamp should be 1/4 of an inch from the end of the connector. Misalignment between the ducting ends should not exceed 1/8 of an inch. Marman clamps are commonly used in ducting systems and should be tightened to the torque value indicated on the coupling. Tighten all couplings in the manner and to the torque value specified on the clamp or in the applicable maintenance instruction manual. When you install flexible couplings, such as the one shown in figure 2-14, the following steps are recommended to assure proper security: 1. Fold back half of the sleeve seal and slip it onto the sleeve. Figure 2-13.—Flexible line connectors. 2-10







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