The one in Murray's diagram is quite different from the 12-32 I was describing. It appears yours does not have detachable wheels - the one in the manual on this site does have detachable wheels, and I was telling you how to get the hub off after you took the wheel off. Yours seems to be like Aldot's, shown earlier in this thread.
Your hub is on a short taper, as Murray's diagram shows. I do not see a way to use a puller on it - certainly not a leg-type puller. I suggest asking a Greenfield dealer how he/she gets them off. Heat is not especially effective with tapers, especially when you are likely to cook your tyre and tube. It needs an axial force combined with an impact. Because the taper is short and steep, it is probably quite easy to remove with the right technique, but without seeing the available space behind the wheel, I can't guess what that is.
