Hey guys Anyone familiar with Airbag suspension on Volvo trucks. We have a 01 NH12 with Airbag suspension...used to be a prime mover but now has a Tipper body in it and she sits up way too high and has a very harsh ride. I'm just not certain whether there is a porportioning valve or a specific level proximity sensor or something stupid like that. Just want to lower the pressure a bit in the rear end. any help would be great. Ryan.
There should be a height control/leveling valve attached to the frame with a rod running down to the axles. You adjust this rod to get your ride height. Here are a couple of pics of what this valve should look like.
thanks mate...i assumed it was something like that. Cheers.