Air Bag Question

[j_boucher]

So trying to familiar myself better with how the air bags work So far I see the following
Air Hose from protection valve near wet tank goes to Manifold
Air Hose goes from the Manifold to the T to Air hose 522 to leveler and 503 to passenger air bag

Then I get confused From the TM it states it goes from the T Passenger Air Bag / Air Hose 503 from the T to the check valve the outer connection on Pass air bag / but the Part diagram shows the check Valve on Air hose 504 inner connection which goes to the leveler.





and it shows Air Hose 504 the Inner

But he check valve in the Parts diagram goes to the Inner not the outer #24



Air-hose 504 pass and 505 Drivers are suppose to go to the Leveler If this is correct how is the pressure regulated on the drivers Bag without a check valve

Thanks for the clarifications in advance

 

[Ronmar]

Leveler air(from the ports on the front of the leveler valve should feed both airbags equally(those 2 ports are tied together in the valve). The check valve is in line to allow flow BACK to the manifold when pressure is removed/vented when the cab suspension valve is released.

If that check and line isn't in place, when you get out of the cab, it balloons to the high side and if you turn off the cab air and vent the supply, the cab will continue to set on the inflated bags until enough air leaks away or someone gets in the cab to get the leveler to call for makeup air, which will finally allow the bag air to deflate back thru the leveler to the now vented/off manifold valve & line...

The valve is oriented to prevent full pressure supply air from flowing directly to the bags and over-inflating them it should only allow deflate air to return...

 

[j_boucher]

Leveler air(from the ports on the front of the leveler valve should feed both airbags equally(those 2 ports are tied together in the valve). The check valve is in line to allow flow BACK to the manifold when pressure is removed/vented when the cab suspension valve is released.

If that check and line isn't in place, when you get out of the cab, it balloons to the high side and if you turn off the cab air and vent the supply, the cab will continue to set on the inflated bags until enough air leaks away or someone gets in the cab to get the leveler to call for makeup air, which will finally allow the bag air to deflate thru the leveler to the now vented/off manifold valve & line...

The valve is oriented to prevent full pressure supply air from flowing directly to the bags and over-inflating them it should only allow deflate air to return...

Thanks for the clarification