Peterbilt keeps breaking airbag studs
Discussion in 'Ask An Owner Operator' started by tamip, May 23, 2021.
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The leaf spring bushings were just replaced so that probably had something to do with it
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The answer to this riddle has been given
Three failures in one day. One of mine was failure of a new air bag. Replaced leveling valve. 100,000 miles later no more issues.Vampire Thanks this. -
So if I change the leveling valve and it continues to do this then what
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Leveling valve fixed mine.
Will it fix yours I can't say for certain. I didn't change anything but 3 air bags and the leveling valve on mine. Didn't do anything with any suspension components. One of the new air bags didn't last but a little over 100 miles before it failed just like the older ones.
Ran the truck another 100,000 miles with two of the old air bags and the two that I replaced. Didn't give me anymore trouble.
You mentioned the leveling valve was replaced on yours about 3 years ago? Had any troubles until just now with this?
Have you checked your ride height? From the picture of the rod that goes to the axle it doesn't appear to be bent. So unless someone has messed with the ride height nothing should have changed. -
New leveling valve is only if the valve is leaking or it is over inflating becuase wont shut off. That would be easy to know. Your load gauge would be reading 120 psi if it isnt shutting off.
Start with the basics. If you can adjust your leveling valve and it stabilzes at normal unladen psi. The leveling valve is fine -
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If it's growling like you said im betting ride height is off + some alignment issues with that tire pattern
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