I would try to nail down where the leak is first. It could be leaking out of the resevoir (easy), or it could be a leaky connection (easy). If it is a bad hose or pump (both mildy difficult), you will want to find out what to change first.
I don't think people rebuild the PS pump. Most people just buy a reman unit. You will need to get a new teflon washer for the pressure line at the pump. They are a one time only use item.
The pump took me about 4-5 hours to change. You raise the car, remove the passenger front wheel, disconnect right tie rod end for more room. Remove the battery, loosen the nut on the power steering pump. Remove the PS belt. Remove the PS pulley. Remove what fluid you can out of the PS resevoir. Disconnect the large hose from the resevoir. Disconnect the threaded pressure connection at the pump. Remove the three bolts that hold the pump in place. The pump will lift up out of the bracket and you can rotate it around to come out the bottom with the large resevoir hose still attached. Once out, you will transfer your old hose over to the new pump. and reverse the whole proceedure. It is a very tight fit, and it takes a bit of patience to get it all done. The teflon washer might be hard to find, and you want to keep everything really clean. This is not something to attempt unless you are pretty comfortable with working on your car. It is more difficult than a 60k or water pump replacement, but is easier than a clutch job.
E-mail me if you have other questions I can help with. I hope it is something easy for you to fix. I have changed four racks and three pumps in the last month, and they are not fun.
- Mike