no , the quick release valve is still in the line, this was aparently some kind of a 2 way valve that somebody put there for unknown reasons, it had 2 of the 4 ports capped off and was installed in a unused port of the r 14 relay valve for the service brakes, when air pressure was applied to charge the park chambers, the air went back into the relay valve and out thru the bottom exhaust, the result was no brake realease and rapid loss of air pressure, i am guessing that this valve has failed, and at one time it was simply used to connect the 2 pieces of air line to the park brake, as the illistrated diagram of a air brake set up does not even show this valve, and according to the diagram, nowhere is the park system plumbed into the service system at the relay valve, just courious why the valve was there
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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