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Here is the question.The nitrogen chilled the entire pin. What prevented the other end of the pin from rotating in the bore of the half web when the jacking force was applied. Here is a hint. They weren't worried about it. They never even checked the witness mark at the other end of the pin.
They only applied the heat to the crank web at the forward side of the pin so there was little danger of the aft end slipping as there was not a 150ēC temperature difference at that end. Just because there is no mention of the aft witness mark is no reason to assume it was not checked.Dan
That's what I was thinking Dan.....Getting something that cold is actually pretty hard to do....Dave
how many pictures of individual side rod webs do you see.Jerry
As Bob says, I would want to check witness marks all over the place checked.
Quote from: Captain Jerry on March 06, 2013, 03:28:17 AMhow many pictures of individual side rod webs do you see.JerryNone, because I think they are integral with their associated main journal, Bob
Still took some big cohones to pull that corrective action off....but there was nothing to loose....so what the hell.Dave
OK Jerry,,,,I think I understand what you getting on about. The crank stopper on the other side of the journal bearing isn't in torsion during the "push", but in bending.....for those of you following along...look at the top of fig 6A in the story on page 1 of this thread.Under those conditions, its impossible for the pin joint there to rotate about the axis of the pin.....I would want to be sure it wasn't bent though.Is that what your getting at?Dave
all previous descriptions of the crankshaft said that it was completely assembled. Jerry
Here is a better link to the works photos:http://www.shipsnostalgia.com/guides/William_Doxford_and_Sons#The_Manufacturing_ProcessDan