Hi all
I am going to put new o rings in my 602s injection pump, I have the o rings and new copper washers with instructions from kent b . In his instructions he says to remove the piston, do you guys think this is really necessary? if I can remove that copper washer without removing that little piston? Is the whole point of pulling that wee piston in the injection pump to clean it and get the copper washer out ? I have never done this before and do not want to remove anything thats not nessacary. I am a little worried about screwing something up.

Thanks

Kenny