Air bags not inflating?? Randomly ??

Discussion in 'Ask An Owner Operator' started by Humbretrucking, Mar 2, 2021.

  1. Humbretrucking

    Humbretrucking Light Load Member

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  3. baha

    baha Road Train Member

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    Sounds like you need to replace the tractor air ride leveling valve with a new one not rebuilt before the next time you dump the air out and it will not air up ever again!
     
  4. Humbretrucking

    Humbretrucking Light Load Member

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    Any idea on cost ?
     
  5. Humbretrucking

    Humbretrucking Light Load Member

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    Keep in mind I’m not talking about the cab air bags.. I mean the four big air bags on tractor frame.
     
  6. Dave1837

    Dave1837 Medium Load Member

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    Replace the leveling valve or unbolt it and move it manually
     
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  7. staceydude

    staceydude Medium Load Member

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    What kind of truck is it?

    My 379 has a leveling valve and a pilot valve. I replaced both, the leveling valve was pretty trashed and I replaced it, The pilot valve was the real problem in the air bags not inflating. When you dump your air bags this is part of that system. One days it worked great, next day no air.

    Leveling valve cost about $70-80
    Pilot valve is $30-$40

    Easy replacement yourself, just make sure new leveling valve is adjusted the same as old one.

    Peterbilt wanted almost $400 for leveling valve... truck pro $79... really hard to find stuff not made In China now. Peterbilt parts
    had no idea what the pilot valve was...

    Pilot valve in red, Leveling valve blue circle. Your truck may not have a pilot valve.

    6B421C0C-2074-45FF-9554-81571C04C5D7.jpeg
     
  8. Socal Xpress

    Socal Xpress Road Train Member

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    Year model make. Basic information is needed in order to help.
     
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  9. Humbretrucking

    Humbretrucking Light Load Member

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    My truck is a international prostar
    2014 international prostar ..
     
  10. 062

    062 Road Train Member

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  11. Heavyd

    Heavyd Road Train Member

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    He PM me, here is my response for everyone else;
    If the suspension dump switch is flashing, there is an error detected in the system. If not, then check the valve and leveling rod to make sure it is attached properly, not broken off or detached at the spring mount. After that, it is basic air checks to see if the valve is getting pressure from the truck and passing it on to the air bags.
     
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