Quote:
Originally Posted by Vibeman
My comment is based on my own experience with industrial and commercial hydraulic systems.
Industrial hydraulic lines typically have a double internal wire braid reinforcement. Agricultural and construction equipment have that too plus somtimes an external coiled wire armor to protect against abrasion. The hydraulic lines on my motor home have neither.
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The jack's return lines are pressurized only on retraction and when up to 1,500 psi max. Most industrialist equipment uses 3,000 or 4,500 psi in both extension and retraction. New farm equipment is using 7,500 psi hydraulic rams. In my limited experience most of the leaks are at the crimp at the fittings or at wear points due to incorrect routing.
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