Nissan Repair: Nissan brakes, brake master cylinder, phillips screwdriver

Question
I have put new calipers hoses mastercylinder and1997 4 wheel truck is still locking up followed instructions on bleeding them still no luck

Answer
Judy,

First be sure you purchase some really good brake fluid like Ford High Performance Brake Fluid.  Then replace the brake lines.  Bench bleed the brake master cylinder before you put it on the truck.  If you get some bench bleeder lines it makes the bleeding much easier.  Basically, you mount the mastercylinder in a vice and then get a large phillips screwdriver.  With short lines screwed into the mastercylinder and the ends of the lines submerged in the brake master cylinder you fill the master cylinder with fluid and pump the end of the mastercylinder with the screwdriver until the bubbles are gone from the lines.  Then mount the mastercylinder on the truck.  Now, with the parts installed go to the passenger side rear of the truck and bleed the brakes from there first.  Then do the other side of the rear.  Then do the passenger side front and the driver side front.  The process is for someone in the truck to press on the brake while you crack the bleeder line open and then close the fitting before they let off the pedal.  Repeat the process until the brake fluid comes out clean and there are no bubbles.  Be sure to keep an eye on the mastercylinder so it does not go empty.  If it does you have to start all over on the bleeding.  Also, it really makes it cleaner to get a clear plastic hose to push on the bleeder screw and insert the other end in a bottle to catch the brake fluid.  Also, this helps to keep air from backing up into the system if you are not fast enough with the opening and closing of the bleeder screw.  What you want to do is roll the windows down so you can hear the person at the brakes and they can hear you.  You say push and hold.  They say holding.  You crack the line open and observe the fluid and then shut the fitting.  Then, you say OK.  Then you repeat the process until the brake fluid comes out clean.  Before you go to the next wheel you refill the mastercylinder.  Do not over fill the mastercylinder as it can cause the brakes to apply by a small amount of expansion that comes from the brakes heating while driving.  Also, brake fluid eats paint so do not get any on the painted surfaces you do not want stripped down to metal.