A. The piston of the jack should be turned back by a certain degree after hand tightening to prevent easy removal after un tightening of the nut. B. The piston of the jack should not be turned back after hand tightening during un tightening of the nut C. The piston of the jack need not be turned back during tightening of the nut D. The hydraulic pressure need not be relieved during removal of the jack « Previous Next »
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