Like JimmyMan says, there are 2 o-rings under the sleeve on the EVO. Remove the o-ring in front of the sleeve, and the sleeve will pull apart with a little brute force. Replace the o-rings. Each of the power steering kits only have 1 of the correct o-rings, you have to buy 2 kits.
Mine was leaking at the sleeve also and wouldn't stop until I replaced these o-rings. I was able to slow it down with some Lucas Power Steering Stop Leak. Always replace the teflon seal on the high pressure connection when you put it back together. I'll take a picture tonight of the EVO seals tonight and update post.
Here are the pics. Also, lube new o-rings with petroleum jelly when you put everything back together.