Tractor/ trailer over night lose of air?

Also, for those who don't know it. You can change the o-ring on those push connect fittings. I have had good luck with stopping air leaks by changing the o-ring if I didn't have a new fitting on hand. You will need a pick(such as a dental pick) to dig out the old o-ring.

 

I got these recently. Good luck so far. 10 for $13 is a steal too. The brass OEM ones you'll find on your rig are upwards of $10 apiece nowadays.

https://www.amazon.com/gp/product/B01MY6JEJ9/ref=ppx_yo_dt_b_asin_title_o07_s00?ie=UTF8&psc=1

 

It's not uncommon to lose air overnight.

I don't think I've ever had one hold overnight. And one of those trucks was only 2 years old and another truck was brand new and pulling a brand new flatbed.

 

Cheapest way is soapy water but you can buy a ultrasonic leak detector for about $60. Will take some time but you will eventually find most leaks.

 

Do they not teach air brakes anymore?

 

Soap water

 

First thing I would check would be the glad hand seals.

 

My compressor kicks in when driving every 11-14 min, not sure if that’s good or bad, but I looked for leaks when parked soap and water and such but can’t seem to find the leak,


One thing I’m thinking is the shifter that’s losing air so I haven’t had time to track it down yet but once in a while I hear it leak and soon as I go to look for it it’s gone.
So far it has eluded me.

 

Do you have a link for one ? ...i am done with 1 of 3 ... Such a pita to play around with soap and water

 

Get one of those 5 gallon backpack style sprayers. Mix with a high suds dish detergent like dawn. Get under that truck and soak it down, you will find every single leak no problem.