Volvo sleeper air bag suspension

hello, new here and any help would be greatly appreciated, as I am trying to change the sleeper air suspension bags. I sprayed them w/wd40, made sure the bags had air, lifted the cab with a jack, let the air out and tried to unscrew it (since the new one has a screw at the top), I tried to pry it with a small crow bar, I tried everything you can think of and NOTHING!!! it won't budge! (I changed the carrier bearing and a u-joint all by myself without a problem, but this is insane). should I try to cut the bag and see if it has a screw/nut inside? any tips and help is welcomed, ty all very much.

 

Ok, will try that, however it will be hard since the screw uptop is sealed/burried inside the u-shaped traverse welded to the bottom of the cab floor. should I try cutting the air bag in half to get a better grip of it? thank you very much Blanco.

 

thank you bravoo67, I will cut it as well. it was something I wanted to do initially, but was afraid something might go bad. if that doesn't work, I'll torch it, as mentioned by blanco. tyvm.

 

I see, if not, the weight of the cab should hold it in place. as yours did and as freightliners and other american trucks do. (no screw top). thanks again bravoo67.

 

Ok, so I got both air bags out. cut them open and with a 3" pipe wrench from home depot ($10.96) unscrewed them from the top metal part. I tried heating them with a torch didn't work, beacause the screw welds in the interior were rusty so they broke easily. I cut a hole on the back so that I can hold the screw with a fixed wrench while unscrewing the old ones and tightening the new ones back in. about 1.5-2 hours. thank God I'm a little mechanically inclined! the dealer would have robbed me. $115/hr, plus shop fees, tool use fees, environmental fees, taxes etc. etc. plus parts. thank you all for your help.

 

thx again bravoo67. LOL just found out that there's a plastic cover in the rear of cab where you access the welded nut. who knew?!