Some ideas:
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http://www.4crawler.com/4x4/CheapTri...eWasherRemoval
And note that I have never run into one technique that will work with every single cone washer. All depends on what it holding it tight. So if you try one technique and get say 4 of the washer off, but 2 won't budge. Try something else on them. I have had some that literally fly off with the slightest tap of a hammer and others that are stuck on the stud and no amount of hammering will make them move.