Loud Air Dryer Purge

Depending on what air drier you have, they make muffler kits.

 

Turn off the truck, problem solved.

 

Fix the air leak and it should hardly go off at all

 

If it is just loud in general, check your system pressures. It should stop pumping air around 125 psi. If it is pumping until 140 psi or higher, the air dryer will purger louder simply because of the increased pressure.

 

I had one that would sound dang near like gun when it popped off. It made a couple of people jump when they walked by when it popped off, I kind of liked it.

 

How often does it do this?

 

usually air driyers got mufflers, but mufflers are usually dirty with moisture, and during the winter this moisture is frozen and they may be forced down with pressure and be lost on road.

In Europe it is not legal to use truck with lowd purge, but no one give u ticket for this so we use to ignore this noise,.... really it is better to know that driyer works well by its noisy purge.