adjusting air govenor

As far as i know the suspension runs at the same pressure that is in the primary tank, I don't have a gauge on it but there is only a small valve between the suspension and that tank which opens when the tank reaches about 60 PSI. I don't see anything else that should affect the air pressure in the suspension in any way. The lines and air bags were checked with soap water (no leaks). I have since Adjusted my air governor to around 135 psi. Waiting to see if that will change things when the truck is loaded with 1000 bags of cement

 

If that air tanks loose pressure i don't think it should affect the suspension pressure is it was already aired up as the leveler valve has a check valve inside it that prevents air from going back through the supply line.

 

But as you bounce down the road, every bump you hit deflates the bag slightly (actually as the truck comes back up). You need to resupply that air constantly, if your air tanks/compressor are only able to supply 80 pounds on average, your bags are not operating at the pressure that you set the ride hight at.
If the truck was not heavy spec'ed then it does not have the volume to supply more than 5 axles (brakes or air ride) thats why heavy spec trucks have more tanks and hi volume air compressors.
You are not having a "pressure" problem, you have a "volume" problem. That could also mean on the trailer, maybe add a tank to the trailer.

 

Height control valves have a neutral zone of a few degrees (10 or 15 maybe) of travel so they don't constantly add/release air during driving.

 

I have kw t700 and the governor it’s not adjustable. I replace it for new one but it’s licking from the head where the plastic blue cover are. What I can do? Thx