Medium and Heavy Trucks

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I have a 2007M2 Business class freight liner, it has a MBE
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Air builds to 80 psi then stops until i rev her up.
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My Mack truck is not building air past 40 lb. It's not a car
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I have an international prostar vin BN195258 I'm having air
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Looking for a diagram for air system on a 2005 Frieghtliner
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i have 2001 peterbilt and i had a lot of water in air system
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I am working on a 1991 Pete with a L10. I just updated the
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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