Which of the listed illustrations shows the INCORRECT method for installing hydraulic tubing? See illustration GS-0065.
• Proper hydraulic tubing installation between two rigidly mounted fittings • Need for small bends or offsets to absorb vibration, thermal expansion, and slight misalignment • Difference between using straight runs versus formed bends (loops/offsets) to relieve stress
• Look at which option leaves the tube with the least ability to flex if the machinery or structure moves slightly • Which arrangement would put the greatest stress on the flare/ferrule joints if there is vibration or temperature change? • Which picture shows a method that would make it hardest to align and start the threads by hand without forcing the tube?
• Identify which sketch has no bend or offset at all between two fixed points • Check whether both ends of the tube are connected to rigid mounting surfaces with no way for the tube to "give" a little • Ask yourself: "If one side moves slightly, which setup is most likely to cause cracking or leaking at the fittings?"
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