ATF has friction modifiers, detergents, anti-foaming additives and a host of other additives. Hydraulic oil used in some pumps are for pumps with metal vanes not the fiber vanes that are used in these power steering pumps. Always check with the manufacturer for appropriate lubricants.
I dont remeber what the quantity is but you can sneak up on it by pouring in a bit at a time and checking it with the dipstick untill it shows full cold on the stick(do this with the car off).Then raise the front wheels off the ground and turn the wheel from right to left from stop to stop about 8 to 10 times.Check fluid level again and top off if necessary.(Now start the car)It may be noisey,It should quiet down in short order.Turn the wheel from lock to lock again 8 to 10 times.Shut car off,put it on the ground.Check fluid level again,top off if necessary.Now leak check it(you will have some)If it isnt pouring out of the hoses/ram/valve assembly.Drive it and enjoy,just remeber to keep an eye on the fluid level untill you can repair the leaks.You will have leaks.Its common with these cars.Good luck,have fun.
If you happen to overfill it (as i did one morning) a novel thought is the use of an Un-used straw! Had one still in paper sitting in the console, you can put it in, thumb it, and pull fluid out, and fling it somewhere else (don't tell teh EPA i said that), i found out the ahrd way what too much fluid in a P/S system does, when the pressure line went, it popped pretty loud, and all that fluid hit my headers on the truck... talk about stink and funky smoke!
It could/will cook the pump at the very least depending on how long you drive it with no fluid in it.The fluid lubricates as well as cools the components not to mention provides a means by which hydraulic pressure is produced to make it all work.
