Lost all my air pressure overnight?

You probably always have some miniscule leaks somewhere. The break leak test is what determines if the leak is too severe to be safe. Look at YouTube or the regs to see how to do brake leak test, if the leak is severe enough to fail that, you should find and deal with the leak. If it passes that you are good. To get your CDL you should have had to demonstrate mastery of the brake leak test.

Just because the air leaked out overnight doesn't necessarily mean you are OOS.

 

Have the auto shift / Automatic with the clutch / I found a leak on the bottom of the transmission / Are 2 lines there / The lower one was bubbling / Is a push on fitting / So will change it over to compressed / Also found some leaks on that firewall airline cluster / On the drivers side / So will replace all the o rings there / Since cannot change them to compressed / Will keep looking tho !!!!!!!!!!!!!!!!!!!!!!!!!!!

 

Have been straining my brain to think of a system like that / To put a dye in the air system that would come out like black smoke / Have heard of using the UV dye thing with the colored glasses and special flash light / But have never tried it / If some one can invent a super good system / Like showing the leak as black smoke / Something that is easy and works well / That is the secret / I would pay a hundred or more / For a super good air leak system !!!!!!!!!!

 

There is a thread that discussed these devices.

This is 1 of many available.

Compressed Air & Gas Ultrasonic Leak Detection with AccuTrak®

 

he probably got it figured out since its been 12 years since he posted it haha

 

6 thusand dollars later for that device? ill stick with soap and water

 

At 5275 dollars / Maybe something that a shop has somewhere ??????????

 

Better price than this one.
Fluke II900
Sonic Industrial Imager for leak detection, 7in LCD

Order #: II900

Mfg #: 5075603










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$20,299.99

 

Here's a better list.

Top 10 Ultrasonic Leak Detectors of 2021 - Best Reviews Guide

 

I mean something that can be added to the air line system / Like maybe in a compressed air canister / Something that easily makes an air leak show up / If black air came out of every air leak / You can see it easy and fix them / Then you would have no air leaks !!!!!!!!!!!!!!!!!!