while driving air compressor keeps coming on and off every thirty seconds or so?

920151

{"text":"I did an applied air brake test when parked with the engine off after air stabilizes there is no air drop. I can't hear any leaks when engine is off and when parked with the engine on the air compressor does not come on and off like it does while driving. any thoughts?","videos":"[]","link":"{}","pics":"[]","canComment":true,"externalShare":false}

1076269

{"replyTo":"","text":"do your air test but on a level surface with your brakes off (applied) so air is running in your brake system, and check for a leak. Brake chambers have a rubber diaphragm that goes bad after 4-5 years.","replyToPid":0}

1076269

{"replyTo":"

147103 发表于 2021-02-08 01:59:00 As usual you throw your typical insults. But it's ok. TP community knows who and what you are.

","text":"i'm the only honest and knowledgeable trucker who is not maga qanon conspirator it seems...Being normal, makes me a stable genius in this industry.","replyToPid":416266}

920151

{"replyTo":"

147103 发表于 2021-02-07 20:19:08 Ok your air governor will be located on your air drier. I would replace it. They are cheap and inexpensive.  About 15$. if problem continues.  Then the air drier may need to be serviced

","text":"thanks I appreciate it.","replyToPid":416244}

1076269

{"replyTo":"","text":"do your air test but on a level surface with your brakes off (applied) so air is running in your brake system, and check for a leak. Brake chambers have a rubber diaphragm that goes bad after 4-5 years.\n\nYour compressor sounds like it's fine, ignore mold marine's advice. The problem is in-between your brake system.","replyToPid":0}

1043492

{"replyToPid":416246,"replyTo":"

1076269 发表于 2021-02-07 22:01:59 This comment has been deleted

","text":"Goes to show your lack of knowledge with trucks.  Problem is in air drier. Not in brake chambers. Another fake account really?"}

1069669

{"replyToPid":416246,"replyTo":"

1076269 发表于 2021-02-07 22:01:59 This comment has been deleted

","text":"posted video how to do proper pretrip.  WATCH it maybe you will learn about trucks.🤣🤣🤣"}

936953

{"replyTo":"","text":"Is it just purging or is the compressor running? The compressor should only run when pressure drops to 100psi. There are components on the engine that are air actuated and will not leak with the engine off but will with the engine running.","replyToPid":0}

920151

{"replyTo":"

936953 发表于 2021-02-07 18:18:44 Is it just purging or is the compressor running? The compressor should only run when pressure drops to 100psi. There are components on the engine that are air actuated and will not leak with the engine off but will with the engine running.

","text":"it makes that air release sound while driving but not parked even with the engine running","replyToPid":416233}

920151

{"replyTo":"

147103 发表于 2021-02-07 19:32:21 What kind of truck?

","text":"Freightliner cascadia","replyToPid":416242}

1054801

{"replyToPid":416246,"replyTo":"

1076269 发表于 2021-02-07 22:01:59 This comment has been deleted

","text":"Nobody going to listen to a convict!!"}