Need info on installing a dump valve
Discussion in 'Flatbed Trucking Forum' started by Southern Flyer, Dec 31, 2012.
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Hanadarko, RedPete95, rockyroad74 and 1 other person Thank this.
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The supply line comes into the leveling valve and one line comes out to a T fitting, to supply the bags. One side of the T goes to the front axle, one side goes to the rear bags. The dump valve goes in the line from the T to the rear bags. -
My point is that because the leveling valve is on the last axle,if that axle raises (or the chassis off the trailer goes down a little)it will lower the airpressure off the airbags off the front axle.
Which is something that would happen because you dump the air out off the bags off the last axle.
Unless Fontaine puts a block on the airlines going to the front airbags at the moment you dump the last axle. -
You stated that it won't work, with the leveling valve on the rear axle. The fact is, it does work at what it was designed for, which does not include leaving the rear axle dumped as you run all around Dixie.
Semi-Crazy's sketch is correct. -
While having a piece off pie(it is afternoon here) i had a rethink.
It can work for limited time.
So i guess we were both wrong and both right at the same time.
Isn't nice if 2 people can debate something and not have a fight? -
When the trailer frame lowers the HCV will add more air. Since the rear dump valve is now blocking air to the rear bags the front bags will continue to fill with air until the HCV reaches it's neutral point again.
Have some more pie! -
I know it's apples and oranges............
PS. I like blueberry ................ -
Like i said i had a rethink.
And don't forget,it is New Year's Day,not when a person is at his prime in his thinking.
I didn't edit my previous posts with my mistake in ,as this would screw up the whole thread.
But do you mind if i stick too regular pie?
But here's another question for you,does the HCV limit itself to how much pressure it puts on the front bags? -
Semi Crazy Thanks this.
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Here is a picture of what I've got right now, so I need to eliminate the long air lines on each side that run to the front and back bags and just use one side of the T from the HCV to the front then the other to the rear and then put the dump in the line going to the rear bags? The valve I have is a 2 wire 3 port electric solenoid that also is used for a air fan clutch, will this work or is it not gonna dump the air off fast enough. The parts guy at Great American suggested that it would work for what I need. AutoCar I'm in Oxford a pretty good bit if you wanna come out and school me on this in person.
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