Transmission issue, Ugh,

[PaHunter]

So when I start the truck I get a low air transmission system with a check light. I wait let everything air up, light goes out, off we go usually no problem. 

Today after work, followed the same thing, put it in drive, drove about 1500 ft to traffic light, stopped and check light came back on. Pulled thru traffic light and Stop triangle lit up and message Transmission System Failure appeared. I pulled over, let the truck idle and air pressure build again, although it was about 98/100psi in the front tank, about 103 psi rear tank.

I shut the truck off waited a few minutes, and restarted the truck. Transmission was fine all the way home, with no further messages or occurrences.

 

Any ideas, thoughts ?

2013 Volvo D13 engine with basic I shift, right about 650000 miles.

 

Chris

 

[NTPA Announcer]

PaHunter

Check your battery connections, and any grounds.  A slightly dirty terminal will cause a intermittent flow of current. It's not always the culprit, but it could help you chase it down. The best of luck Sir.

[Chad Heiser]

The pressure levels you list are low and should be higher when your air tanks are full.  If that is all the pressure you are building, then you either have a leak somewhere that equalizes the tanks out at those pressures or your air governor is dying and only building those low pressures.  With those low pressures, it won't take much air bleed off (couple of brake applications or transmission shifts) to drop the system pressure enough to give you a low air pressure warning.  The below information is direct from an air brake check list pre-trip inspection.

-The low air pressure warning signal must come on when pressure drops between 55 and 75 psi.  
-The tractor protection valve and/or parking brake valve should close (pop out) when air pressure falls below 20 to 45 psi (set by manufacturer)
-When the engine is at operating rpm’s the pressure should build from 85 to 100 psi within 45 seconds in dual air systems
-Air compressor governor cut in pressure should occur no lower than 85 psi for a bus and 100 psi for a truck
-Your air system pressure should build to 120 PSI before the governor cuts out

[DesertMiner]

Check your fault codes... see what you got!

[Parrformance]

Did it happen to be a cool/cooler day,  I had more issues with the governor on days that were cold and dry.

Took quite a while to build enough pressure to start out back on the road one morning.  I replaced the Governor and noticed that the tanks now hold 120 something, where before they hovered right around 100 all the time.

I keep a new replacement in the truck per the suggestions from this forum.

[NTPA Announcer]

Speaking of air systems. Does anyone ever add a little tool oil to the unit and if so where ?  I’ve been told to remove the intake at the filter and dump about 2 oz. in.  

Thoughts? 

[GeorgiaHybrid]

Denver, the only thing that I have ever seen added was antifreeze in VERY cold weather. Oil in an air system is not a good thing as it will get stiff in cold weather and even in hot weather, it will thicken and cause things to stick. If you have an issue in your air system, take it apart and fix the problem. This is one area where WD40 and Duct tape doesn't work.

[NTPA Announcer]

Dang it Georgia Hybrid. You’re making me do it the way it ought to be done 😁 Thank you Sir for the good advise. Trust you all are doing well See you at the ECR!! 

[HERO Maker]

Denver, you're probably focused on using tool oil for the tools that can attach to our systems.  Never put oil in the system, but you can and should put it into the small tools that we might use..Stapler, small nail gun, air ratchet....... You can put 4 to 5 drops right where the tool connects to the air hose, but never in the system.