07-26-2022, 07:55 PM
Keeping in mind we are no better at armchair diagnosis than the info we have to work on.
Let’s separate this into two issues. One, is the coach now at correct ride height with the engine running? Did you resolve that? If so, how? If not, what is the air pressure produced by the engine compressor. It MUST be 120 or higher.
It’s clear the coach settles overnight. You have confirmed it is NOT the six pack with your shutoff valve. Great work!! So you obviously have a leak in airbags, airbag tanks, or the tubing. Some leaks in airbags are impossible to detect because the leak area is hidden under the bottom plate. Search for Goodyear air bag burping.
To answer your specific question. The tag system receives it’s pressure for a give side from the drive side left or right air bag tank. These are big square tanks welded as part of the frame. A small line will lead from the drive air tank to the tag air tank. When you get to looking under there, you will see only one tag air tank. It has a hidden divider welded in the middle. Now the air line coming out of the tag tank and feeding the tag bag has two three-way valves in it. One of the three way valves is actuated when you want to release air from the tag. When actuated it closes the path to the tag air tank and opens a path to atmosphere. Clever, actuating the valve isolates it from the drive air bags so you don’t lower the entire side of the coach.
You will find a second identical three way valve in series with the one discussed above. However, it’s normally open port will be connected to an air line that is eventually connected to full pressure coach air. So when that valve is actuated, it closes the path to the drive bags and opens a path to full coach air pressure, thereby increasing the pressure in the tag bag without increasing the pressure in the drive bag.
Let’s separate this into two issues. One, is the coach now at correct ride height with the engine running? Did you resolve that? If so, how? If not, what is the air pressure produced by the engine compressor. It MUST be 120 or higher.
It’s clear the coach settles overnight. You have confirmed it is NOT the six pack with your shutoff valve. Great work!! So you obviously have a leak in airbags, airbag tanks, or the tubing. Some leaks in airbags are impossible to detect because the leak area is hidden under the bottom plate. Search for Goodyear air bag burping.
To answer your specific question. The tag system receives it’s pressure for a give side from the drive side left or right air bag tank. These are big square tanks welded as part of the frame. A small line will lead from the drive air tank to the tag air tank. When you get to looking under there, you will see only one tag air tank. It has a hidden divider welded in the middle. Now the air line coming out of the tag tank and feeding the tag bag has two three-way valves in it. One of the three way valves is actuated when you want to release air from the tag. When actuated it closes the path to the tag air tank and opens a path to atmosphere. Clever, actuating the valve isolates it from the drive air bags so you don’t lower the entire side of the coach.
You will find a second identical three way valve in series with the one discussed above. However, it’s normally open port will be connected to an air line that is eventually connected to full pressure coach air. So when that valve is actuated, it closes the path to the drive bags and opens a path to full coach air pressure, thereby increasing the pressure in the tag bag without increasing the pressure in the drive bag.
Richard and Rhonda Entrekin
99 Newell, 512
Maverick Hybrid Toad
Inverness, FL (when we're home
)