Re: Questions about AIR BRAKES ???

Posted by john in la on January 11, 2006 at 19:33:29 from (65.6.106.168):

In Reply to: Questions about AIR BRAKES ??? posted by Way Up Here on January 11, 2006 at 18:47:13:

It would take a book or at least a few pages to give a step by step with all the valves and safety devices installed in a air brake system.

Such as one valve that delays air to the truck for that mila second to give the air supply time to reach the trailer when you step on the pedal.

Beside the lack of brake fade I think one other point for air brakes on large trucks is the ability to apply large amounts of brake pressure (max air supply of 125psi) by pushing on pedal and only using the force on your foot to open the valve.

In hyd brakes your foot applies the pressure. Yes it is assisted in new cars with vacuum brake boosters (power brakes) but it is nothing like opening a valve and applying 125psi of pressure.
You would need gorilla legs to apply this kind of pressure with hyd brakes.

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