@isbcornbinder

2 years ago

Public transit busses have used a three valve system for air suspension since the 1960s. Two independent rear valves and one for the front. There is an added minor complication to the front suspension when a kneeling feature was added for easier access for disabled passengers.
Something that almost always makes for heated discussion is adding pressure to raise the vehicle. Your vehicle will weigh the same at any height, so the pressure should be the same. Added volume, like cubic feet or cubic liters of air will lift the vehicle.
EXAMPLE: If a person puts any vehicle on a vehicle lift, the load on the lift does not increase after the initial lift. The vehicle will weigh the same at one centimeter or two meters.
An increase in pressure is a response to resistance, like adding a load to your truck or passengers to the public transit bus. Guess what I did for a living.
Air springs are possibly the most reliable system on a vehicle. I have seen air springs last for over 20 years and several million kilometers. I drove my vintage 3/4 ton truck for 20 years and 225,000 miles. The truck suffered one air spring failure. A small stone became trapped and abraded a fail point in the mid space where the spring folds. After I took this truck off the road and put it in storage, the suspension continued to hold air for the next 2 years, until it took the truck apart.
My ongoing truck project has an air spring suspension. I had SCOTT SPRING LTD freshen the original springs and reduce the number of spring leaves to three per set. I am using the springs only as axle guide and not load carrying.
I enjoy you channel. I did contact you about where to get an independent wire harness for a CUMMINS 24 valve. I thank you for your quick response.
I am not a shinny bit and pieces person. I had that Crow gene surgically removed in January,1961.

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