Kenworth T680 can’t build air but you won’t guess what caused it, I have never seen this before.

2021 Kenworth T680 with a Paccar MX13 engine has an air leak at the discharge line. I found the first line had a hole, a mechanic installed a second discharge line and that also had a hole in the same location.
After further inspection, found the air inlet at the air dryer was completely plugged with carbon buildup. So we had to install a new discharge line and a new air dryer. Definitely you replace all the air fittings.

[@Steve.191]

Thank you 👍

[@robertovillalon2841]

Thanks!

[@jorgefacio690]

on a 2012 freightliner cascadia with no air leaks, would you know how often the air dryer should purge?

[@IceColdGeico]

Great video, but still curious as to why the line would burst right there. Even if the drying inlet was completely blocked, it just means that the flow would stop. Odd.

[@CarlosDieselElectric]

I agree, not sure why in the same location as the first.

[@alexv9122]

The compressor will keep pumping air, beyond what the hose will hold. I've seen it numerous times

[@DineshKumar-se7ue]

just want to ask that you showed a book cadloog book gor freightlinner cascedia truck. so what is the name of cad log book and from where i can buy it pls help me

[@servicesmecaniquev.laverdu1726]

😂 i saw that but iced up inlet fitting instead

[@jorgebanda7731]

What can cause that build up I’ve replace the hose and the dryer and I still have a similar issue truck won’t air up front time to time

[@CarlosDieselElectric]

Build up comes from the air compressor, also any air leaks can cause the air compressor to work extra and push carbon and oil through the system. But you may have a check valve that is not working or getting stuck

[@CloudytriggersASMR]

How long did the line replacement take?

[@CarlosDieselElectric]

The removal and installation doesn’t take too long. The transferring of fittings takes the longest. I would say 2-3 hours

[@hddm3]

Damn they couldn’t run that closer to the compressor? Really.

[@hddm3]

Must have woke engineer’s working for paccar now