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I don't recall many delay actual delay line problems period. The few I have encountered have been open lines that caused only chroma to be displayed. the ones that were shorted caused poor color fit. Not ghosting. Of course this is based on servicing them in the 70''s and now delay lines could be a problem. If it is in the delay line circuit I would suspect an impedience mismatch at one end. Check the terminating circuits. I have also seen this problem caused by poor IF response. I know the dreaded alignment. Could be a bad cap in the IF. Especially if they are hidden in the IF can. Bad soldering of the board to all the ground stakes can also cause it. I would reflow them and not depend on seeing a crack. Just do it. Same with all the boards. Alignment is really not that bad if you have access to the equipment. Even if you make no adjustments an alignment hookup could tell you a great deal about how well the IF is preforming. Also don't overlook any peaking coils in the video circuits.
good Luck.
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