Air Bag Ride Height Dimension - 259 Bag

[truk4u]

Anyone have the measurement for the bags on an XL, I can't find it? The measurement is from the top plate to the bottom plate I think.

[JIM CHALOUPKA]

Tom, I think if you call Prevo parts the salesman can tell you that dim.

JIM

[dale farley]

Tom,

On page 16-29 of my maintenance manual, it says the measurement for the front air bag is 11.7 inches at normal operating air pressure of 95-125 psI. The measurement is from the top to the bottom of the plates.

The rear bag measurement should be 11.5 +- .25". Hope this helps.

[Jon Wehrenberg]

Dale,

Don't confuse air bag measurments with the Prevost recommended ride height measurements.

The dimensions you cite I think are the dimensions you wish to obtain when adjusting the ride height valve arms. That dimension can be adjusted up or down, but what Prevost specifies is what they want the ride height to be.

The air bags will actually extend to a greater height, limited only by the shock absorber travel and dependent upon aux system pressure.

[truk4u]

What I'm trying to do is make sure my ride height is within spec. After replacing my travel coil/valve, the bus now seems to be setting too high and changing those components should have no effect on ride height (measured from the bottom of the bus just behind the front wheels and just in front of the rear wheels). The air bags are right at 12" when measured from top plate to bottom plate and the ride height is 11 1/2" measured from the bottom of the stainless to the floor as mentioned above.

So which measurement is the real ride height number Jon Boy?

Thanks Dale, I don't have the Prevost maintenance manual unless Brian hid it.

[dale farley]

Tom,

My scanner is not working, so I made pictures from the maintenance manual.