You push in on the brake pedal that goes to the master cylinder. It applies pressure to the abs control valve and distributing valves. If the abs control valve goes bad you will lock the brakes up instead of an even stop. One distributing valve for the back and front axles. Nascar drivers can lock out the rear wheels, all brake pressure goes to the front wheels for a burnout when they win. Each distributing valve controls the pressure to the left and right wheel.
Say your car goes about 50,000 miles and you hear the clicker for low pads. Left side pads are worn out, right side pads look almost new. You change both sides. Another 50,000 miles and the pads are the same as before. That axle distributing valve is out of adjustment. It's easier to replace it than adjust it.


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OLD GEEZER FISHERMEN NEVER DIE, THEY JUST SMELL THAT WAY!!
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