Kenworth 8 airbag question

[JimT]

Larger air lines will allow a greater volume of air to flow through, even with a reduction at a fitting larger lines would still help. Although you may still be limited by the input air flowing through the leveling valve.

I would highly recommend replacing all airbags at the same time. If one has worn out then most likely they are all equally worn.

Also, you don't actually need a jack to lift the frame, simply disconnect the bag to be changed and either plug the line or bypass that bag with a quick connect fitting. Then disconnect the leveling arm and manually raise the suspension using the other airbags. Much easier than fooling around with a jack. Plus, once all the airbags have been replaced you'll want to remeasure your ride height and adjust as needed.