no brakes-master cylinder

[dolfans]

got a 1998 grand voygager and this morning i had no brakes.the pedal went to the floor.the brake pads are good and i have no leaks.i was told it is the master cylinder.is it hard to do myself?i have changed the front pads myself but i dont know how to bleed the lines.how do i do this?any help will be useful thanks

[StandOnCliff]

It isn't hard to do. Disconnecting a couple lines off the master cylinder and two nuts is it.Don't forget to bench bleed the new master cylinder before installing it. If you don't do this procedure, getting all the air out will never happen. It should be part of the included directions for installing it. When bleeding brakes always start from the wheel furthest from the master cylinder and work closer with each wheel. Basically start with passenger rear, go to drivers rear, then passenger front and finally drivers front. Having two people makes it easier if you don't have the correct bleeding equipment. Have one person pump the brakes a few times,when he's pushing on the brake pedal as if he's trying to stop the vehicle and hold it there, crack the bleeder open. Close it before he lets off the pedal or starts pumping again. His foot will begin going to the floor when the bleeder is open, have him continue pushing it downwards and don't let him let go of the brake pedal until you have closed the bleeder or it will suck air back in. Once the bleeder is closed have him pump it again five or six times then hold. Keep doing this for each wheel until nothing but fluid comes out. Remember to check the reservoir every once in a while or you will get air right back into the system. After about every five cracks of the bleeder I usually recheck fluid level.