I have a 2016 Peterbilt Model 365 Tri-axel seems like I have to use a a lot of air pressure to get the truck to stop even empty. It only has 28000 miles the brakes have never got better since I have owned the truck.
Poor braking
Discussion in 'Peterbilt Forum' started by CARL HINKSON, Apr 21, 2017.
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I think there may have been a relay or doodads installed into your braking system to limit the loss of air when empty. Theoratically you have just lost your trailer and is now bleeding through your red glad hand. The engineers may have built your air distribution system with a relay or few to prevent you from losing too much air too fast.
My theory is if you were to remove this protection you might find the whole of the primary air supply now available to your braking. Just like it was old school. -
Dave_in_AZ, AtticusRoad and x1Heavy Thank this. -
I did write my first post poorly but I think from your answer you are on the track I think you need to be on. Consider it carefully. Who knows it might work out well.BoxCarKidd Thanks this. -
No clue as to what the problem might be, but that is a sweet looking truck.
CARL HINKSON Thanks this. -
I was a coffee with a bunch of drivers and they had your same view of what going on. I will have an answer tomorrow.
Thanks for your help
Carl Hinksonx1Heavy Thanks this. -
You could have an issue with the R-14 relay valve, this would cause issues like hard braking.
The R-14 relay valve is separate from the trailer relay valves, so if there is an issue, it could be with the R-14.x1Heavy Thanks this. -
Disk or drum brakes?
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