Once you have the shock apart you need to removed the piston etc and the the end piece that holds the piston on .There will be a tapered needle , thats what usually siezes.Just pull it out and cleanit up , probably need a new O ring around it.If it doesnt come easy take the clevis off the other end off the shaft remove the inner rod and use another disposable rod (like welding rod) to carefullt tap end needle piece out .