EVO leak
The part you're referring to is the EVO. It gives you the variable assisted power steering.....full power when turning at low speeds, and lesser at highway speeds.
The problem you have is due to o-rings. I'm definitely familiar with this 'cause I just had to replace these about a month ago, due to a PS fluid leak. There are a total of 4 o-rings on the EVO. You need to remove the powersteering pump, disconnect the high and low pressure hoses, and then remove the EVO from the pump. Replace the o-rings. Two of them are on the end of the EVO that screws into the pump, and the other two are up under the swivel. In order to get the swivel off, just remove the two outer o-rings, and then pull hard on the swivel. It should slide off, exposing the two o-rings. Coat the new o-rings with petroleum jelly, then put everything back together.
The o-rings that you will need are included in power steering seal kit #8526. Autozone has it for $9.99. It has other o-rings that you won't use. You'll need 2 kits because the kit only has 1 o-ring that goes up under the swivel. If you're not replacing the PS high pressure hose, you'll also need the little teflon seal that fits over the hose connection that screws into the EVO. If you don't replace this, it will end up leaking. You'll need to go to Ford to get it. (part #388898-S) Should cost <$2.00 each. Before trying to slide this little teflon seal over the threaded hose connection, put it in some warm/hot water, and then slide it up over a punch to stretch it some. Then, you should be able to fit it over the threaded connection. Bleed the system, and put everything back together. Also, remember to refill the powersteering system with Ford Type F ATF....not normal powersteering fluid. You can get that at Autozone also.
If you want to slow down your leak until you get this done, pour in some Lucas power steering stop leak. It works pretty good, but probably won't totally stop the leak.
Good luck.
David
'95 SC
5-speed