Air tanks question

Yes it has a leak. As long as it isn't leaking out faster than specified in the air brake regulations then it is legal to drive.

I would still search for the leak, always good to be on top of little things like that.

 

If your hearing isn’t the best, like mine. Spray every connection with soapy bubbles. Outside the truck and inside. Or pay some guy to look for you.

 

I don’t know why newbies always make an issue out of this. Long as you’re not leaking all your air out in an hour, don’t worry about it. In my case, I have a 2014 Pete, I will lose all my air over night, however, I’ll still have air in a 12 hour period.

 

Those are bad for leaks along the firewall and if it has a Cummins, then check the signal line on top of the compressor.

 

Air drier is a prime culprit.

 

Fittings around air tanks are bad about leaking too.

 

As the other posters have stated, check for loose connections with a spray bottle of soapy water. Inspect the air lines that pass through the firewall/bulkhead. These lines have a tendency to leak due to the cab movement and vibrations while driving.

Inspect the rear suspension air bags for leaks. Look at the base of the air bags and check for any abnormal wear in the rubber.

If the truck is equipped with a Cummins X15 inspect the main air line at the top of the air compressor. Also, inspect the air drier.

Inspect the cab air ride system and see if the leveling valve is allowing air to escape.

There are several things that could cause the air to escape while sitting overnight.

How does the air system when you first start the truck with zero air in the system? Does it take a long period of time for the system to reach the governed pressure?

Once the system has reached the governed pressure and you hear the drier purge, how long will the system hold air before the air compressor engages again to refill the system?

 

Push fittings on modern trucks suck for holding air long term..