Quote Originally Posted by Silver View Post
Looking at advice on running them empty - looks like it has worked this far for Bigrig! Instructions only take one so far :-)

I have the blue firestone ones, not the red polyairs. The recommendation on the paperwork is 5 psi min, 35 max - but t here are some more detailed instructions about getting under with a straight edge, and checking how far the bag protrudes into the coils.

Let me know what colour yours are, if blue, I'll dig out the instructions and reproduce here. Airbagman might have the info on their own site?

The red ones are supposed to be pumped up to pressure, then loaded up. That is the reason I went for the blue ones, they expressly say you can load up, then pump up back to level.

Lifts - to run the blue ones with a 2" lift, a hard plastic cup is supplied. Goes at the bottom of the coil, then bag sits on top. Would have to get under and have a look to see if it interferes with up travel. The airbag takes articulation away to some degree I think.

Just recently some posted on another thread here, that an airbag loads up the spring mount and can cause cracks. The impression I came away with was that the airbag at higher pressure has little give, which translates into higher shock loads on the mounts. There are braces available to help with this - if carried to the next step, I guess the chassis might be next in the firing line. Best solution is to leave some of the weight at home?
All, I have the red ones. Had a look at the hangers and all appears ok. Looking at the coils they look newish too.... Yellow in colour.