Once you remove the clips holding the caps in, place two sides across a vice and hit the axle to remove one side of the cap at a time. Sounds like you are trying to remove both by pushing the top down. If this is what you are doing apply heat and try to move it.
Hope this helps.
The member formerly know as J10_Jimbo, who due to technical problems is now "UNAUTHORIZED". I"m authorized again. Wooohoo! Now which name to use???
Owner and rebuilder of FSJ's since 1983