Locking Tag Axle Tire

[Jeff Miller]

To reduce the lag-time (delay) from pedal (treadle) to brake there is
a relay valve near the center of each braked axle. Usually centered
to maintain equal-length brake lines, this relay valve takes a small
control pressure from the treadle valve (pedal) and opens the relay
valve proportionally to let a large amount of air through from the
local tanks and large supply lines.

So the simple version is that the actual braking air pressure needs
only to travel from the local air tank through the relay valve to the
brake chambers, ... not the length of the coach.

- Jeff Miller


--- In WanderlodgeForum@yahoogroups.com, DAY8293A@C... wrote:
> Say guys,,, would this be ok for you?? I can see the
letters, and
> still use lower case for you !!
> One question,, where does the brake "air pulse" start? at the
brake
> pedal? Or does that control another brake control system that sends
out the
> compressed air? Seems the rear brakes get their air from the rear
air tanks, and the
> front from the front ones. Does it go all the way to the front
pedal, and
> then back to the rear wheels??
> I have never thought about how that works. Might be something
good to
> know,,, DAY JAX FLA 83 PT-40
>
>
> [Non-text portions of this message have been removed]