Using the incorrect fitting on the hose, such as a tube size fitting on a full bore hose, a non-skive fitting on a skive hose or a hose and a fitting designed by different manufacturers.
ii. Incorrect assembly procedures due to insufficient or incorrect lubrication, improper positioning of the fitting on a hose or incorrect selection of crimp and swage dies. A crimped or swaged fitting must be properly positioned on the hose for correct assembly; always mark the fitting position before crimping or swaging the fitting.
iii. Incorrect hose length. (Often an assembly is too short to allow for proper operation under pressure.