How do you change the master cylinder on a 1997 ford Taurus?

When you buy the new master cylinder it will actually have installation instructions inside the box, for what to do with the master cylinder before you put it on for example bench bleeding the m.s. to make sure there is no air in there before you put it on. But to get started. you simply disconnect the brake lines from the master cylinder, they should be in the back, on the rear of the master cyl. then its off, and you will get air in the lines, you must bleed the brakes, you can find the process for this in the haynes or chiltons book at the library, copy the instructions so you don't have to go buy the book. anyway, after you follow the manufacturers instructions for bench bleeding the m.s. then you are ready to install. you will have lost some fluid, so it is a good idea to have a large bottle of brake fluid on hand first. you will lose some more when bleeding the brakes. I think the nuts take a 7/16 wrench, if not it may be 1/2 inch or 10 mm nothing else, i doubt, its a small size, same goes for bleeeding the brakes, so install the new, reverse of removing the old, replace the cover (where you will with fluid). bleed all the brakes, have someone pump and hold the brakes while you bleed and then tighten the nuts one by one starting with the front brakes. when all brakes have been bled, lower the car off the jack, let it sit for about 20 minutes for all fluid to even out, check your brake fluid at the master clyinder, and replace any lost fluid. check your brakes in driveway before going anywhere. goodluck kel