I've got a 1965 koken barber chair. I've taken it down to where the only thing left is to extract the piston from the base,that way I can easily move it into place,replace the oil and after cleaning all componants put it back together. What position does the handle have to be in before I extract the piston? Do I have to pump it all the way up first? I've been to a lot of places looking for an answer and you gentlemen seem to know which trail to take. Walt
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