If it's the brakes your talking about there is one bleeder valve at each wheel on the brake calipers in the front wheels and on the backside of the rear drums. It's a small screw that has an opening at the top. If your going to bleed them yourself you'll need an extra person.
First make sure your Brake fluid reservoir is full. ( You'll need to keep it full during the procedure ) Then you bleed each wheel starting at the right rear, then left rear, right front then left front. To do so get your wrench ready to open the screw a 1/4 to 1/2 turn to the left.(it's an 8mm or 10mm) Then if you have a small piece of rubber hose to attach to the end of the screw and place in a clear bottle do so.
This is to observe the fluid for air bubbles as it comes out. If not just repeat the bleeding about 4 to 5 times on each wheel. First have the other person pump the brake pedal 3 to 4 times and hold it down.
Then you open the screw up for a second or to and shut it back. Then they can let off the pedal and pump it back up for the next time. After all four wheels are done the pedal should be noticeably firmer.
To alleviate this back pressure, every air system should have a "bleeder valve" which is no more than an extra valve that is not connected to any aerating device. If you're operating three items, you should purchase a 4 gang valve, and don't attach anything else to that last valve. Likewise, get a 3 gang valve to run 2 items, 5 gang for 4 items and so on.
To properly adjust the bleeder, start with that valve completely closed. Then, adjust the other valves so that each or the aerating devices is operating correctly. Finally, slowly open the "bleeder valve" until the aerating devices begin to slow down slightly, but are still pushing an acceptable amount of air.
The "bleeder valve" will need adjusting occassionally, as the pump wears and airstones begin to clog. However, if any device (usually an airstone) is so clogged that the bleeder must be completely closed, that device should be cleaned or replaced. All rights reserved.
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