Why do Volvos old or new…

Cause a lot of the Volvo crowd don't maintenance much.

 

Volvo was also one of the first to use the plastic quick air connections. They seem to leak more as they get older. They use build trucks with copper connections and crush pressure washers or whatever it called. You could only really use them once but they would not leak. Now I think ever truck builders seem to use them. Freightliner dose anyway.

 

Well, to be clear, it's not the Volvo, it's the poorly maintained air dryer, and probably air leaks. Not Volvo specific.

 

Like @Brandt said. Mack does it also. They have a junction block under the cab that is next to impossible to get too. It has a dozen or more plastic crappy airline connectors in it that leak.

 

Plastic body, a couple lines can be changed to compression fittings or buy a whole new body.