Jump to content
Sign in to follow this  
Refined Trucker

Dryer hiss

Recommended Posts

01 CX when air pressure drops to cut in level air starts hissing from dryer for sometimes 2 minutes or more then stops and pressure builds as normal. During this the pressure holds constant but noticed if I'm building a lot of boost during this time hissing gets much louder. Just wandering which end to look at first compressor govner or dryer.

Share this post


Link to post
Share on other sites

I cant help you but i have a peterbilt that does the same thing. Hope you get some good answers. Ive been close to buying a new dryer. Mine has a new governor.

Share this post


Link to post
Share on other sites

My first thought is worn o-rings in the purge valve. Sounds like the purge valve is hanging open, a renew/rebuild kit would most likely solve that issue.

  • Like 1

Share this post


Link to post
Share on other sites

When you hear the "hissing", check to see if it is coming from the dryer.

Share this post


Link to post
Share on other sites

I have had similar problems. It never really gave any problems but I replaced the governor because it's the cheapest place to start. Still did it so I took my ad-4 air dryer off and replaced it with an ad-9 dryer and it stopped it. It could also be as simple as the relief valve on the bottom of the drier sticking open. Hope this helps.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...