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How to check tie-rods are tightened to their correct pre-tension

Connect hyd-jacks to all the tie-rods together.operate the pump until prescribed hydraulic pressure and maintain the pressure. Check the clearance between the nut and intermediate ring (or contact
surface as in MAN B&W) with a feeler gauge, if clearance exist then the nut is tightened onto the intermediate ring and the pressure released. if a tie bolt is found broken, it must be immediately replaced, otherwise fretting and premature failure may occur.
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