Pat, I could use your AMBO veteran expertise again.
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I took yesterday the truck to the mechanic to remove the air hose and for a overnight
battery recharge (they were practically empty).
This morning he calls me that there is another leak.
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View attachment 321061
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I guess this is the Air Dump valve (it is with string attached
)
The air is running thru the gasket.
Is this is a Ford OEM or AMBO addition?
Do I need it at all?
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That probably is the air dump valve and it may also be the automatic air tank condensate drain, or a combination of both. None of the ambulance units I drove had this feature, but the Fire Trucks did.
The whole purpose of the air dump system is to lower the rear of the ambulance to make it easier to load the stretcher in the back.
Federal Specification for the Star-of-Life Ambulance KKK-A-1822F
July 1, 2007 - GSA Automotive
3.4.11.7 FLOOR HEIGHT.
The finished floor (loading) height shall be a maximum of 34 in. The height of the floor shall be measured with the vehicle loaded per AMD Standard 017
Since your's is 4WD, it probably sits higher than a standard 2WD version, making this a necessity for ambulance operation. This system was probably added by Wheeled Coach to meet the requirements, and is not necessary for the operation of the truck itself.
I would check to see what kind of air compressor you have, either fully electric or mechanical mounted on the engine somewhere. Since you have airbags on the rear suspension, this is what is used to pump them back up after an air dump. It probably has a valve or set of valves in the cab to adjust the ride height as well. If not, then they are easy enough to add.
Even thought you may not need the rear 'squat' feature, with a little modification of a regulator and hose, the air system is useful for many other things, like inflating tires, air mattresses, beach toys, powering air horns, and general 'dusting' after a long sandy trail. Most of us are trying desperately to find, purchase, and install a system like that for those purposes.
Personally, there is no way I would remove that system.