How do I bleed the brakes on my 1989 mazda b2600 pick up?
Bleeding brakes is the same on all vehicles (typically) to do it right, it takes two people. One to pump the brakes, and one to crack the valve. If you don't do it properly, you will get air up in the lines. (which is the opposite of bleeding them) First, you should make sure the reservoir under the hood is full, and you should continually check it to keep it full. If it runs too low, you can get air in the system. Typically, one person pumps the brakes (brake pedal) and holds foot on pedal. The other person will get under the car, and with a wrench the proper size, "crack" the valve to allow a stream of fluid to come out. (YOu have to remove the wheel to access the bleeder screw/valve usually) You want to Ideally open the valve, and then when the stream slows down, you want to close the valve while there is still a "positive" flow of fluid coming out. It you wait too long until the stream stops flowing, you can get air in the line, especially if person A takes their foot off the pedal and allows it to retract...this will 'suck' air up the line. You want air to go "out" the line.
You need to continually do this on all wheels until there is no more air in the system. You should start with whichever wheels are furthest away from the reservoir. (usually start with the rear) Do each wheel in succession. You would probably have to do it around all 4 a couple of times.
The problem with this method is that it to get the air out, you are trying to push the air "down" which is against the natural flow, since air naturally rises. There are brake bleeder tools where you can pump fluid "into" the bleeder screw, which then forces the air "up" where it naturally wants to go, and also makes bleeding brakes a one person job...but you need to get the tool. Either way will get the job done.
Jul 21, 2014 |
1988 Mazda B2600 Cab Plus