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Related Medium and Heavy Trucks Questions
Air in secondary tank will not build air over 50psi at idle.
Air in secondary tank will not build air over 50psi at idle … read more
Expert
Expert
10,483 satisfied customers
Have a 91 kw. Had to replace the air dryer. The air dryer
Have a 91 kw. Had to replace the air dryer. The air dryer will not purge and i am building in excess of 170 lbs of air pressure. … read more
Joe Green
Joe Green
59 satisfied customers
I have a 2014 CXU613 that builds air pressure and looses it
Mike I have a 2014 CXU613 that builds air pressure and looses it for no apparent reason. Changed filter and Purge Valve. No leaks anywhere from lines. It looses air while just idling with no one in th… read more
Joe Green
Joe Green
59 satisfied customers
205 Keworth T800 with C13 Caterpiller wont build air Iv
205 Keworth T800 with C13 Caterpiller wont build air Iv replaced air compressor Air Dryer and Governor… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
536 satisfied customers
2005 mack granite e7 wont build air. I installed new
2005 mack granite e7 wont build air. I installed new compressor, new govner, new air dryer. Will not build air at idle. Air lines are not kinked. No regulators going into tanks. … read more
Bradey V
Bradey V
Certificate
Having a hard time building air. ISX 15 Cummins 2013
I am. I've put a new air dryer on, a new air compressor on changed the dryer filter, changed the dryer governor. I used shop air to check flow in all of the air lines to both tanks and pushed shop air through the signal air line … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
536 satisfied customers
I have a Oshkosh the air builds up to 80 psi and stop and
I have a Oshkosh the air builds up to 80 psi and stop and about 3 minutes later it stop to build up to 120 psi … read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I'm having with air pressure on a 379 Pete with vin #
I'm having with air pressure on a 379 Pete with vin # ***************** it's only building 90 psi on primary side no air leaks and I have tried a new compressor, still 90 psi no secondary at all no ai… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
536 satisfied customers
I have a 1988 pet engine but air build up really slow. 1988
i have a 1988 pet(###) ###-#### engine but air build up really slow … read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have a air pressure problem on my Mac truck. It does not
I have a air pressure problem on my Mac truck. It does not generate enough air pressure on the primary side there is a 40 pound difference between the primary and secondary and when we work the truck … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
536 satisfied customers
KW T-660 2010 secondary air pressure gauge is reading 150
KW T-660 2010 secondary air pressure gauge is reading 150 psi while primary is at 110-115 as usual. I pumped brakes down to zero psi on primary and secondary gauge read about 50 psi. Is my secondary p… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,046 satisfied customers
05 freightliner columiba 1FUJA6CV56LV41816 secondary air
05 freightliner columiba 1FUJA6CV56LV41816 secondary air bleeds off from 135 to 110 psi in about 30 sec when running kicks the compressor in and pumps back up to 135 psi (you can watch the gauge go do… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,013 satisfied customers
2011 Peterbilt 320. Slow to build air pressure. Won't build
2011 Peterbilt 320. Slow to build air pressure. Won't build past 1oo psi at idle. Driving it builds air normally. @1500 rpm. it will build pressure but very slowly. No audible air leaks. By passed air… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,013 satisfied customers
I have a 2012 KW T800 with 525 cummins. Wont build air. The
I have a 2012 KW T800 with 525 cummins. Wont build air. The compressor is pumping air to the ADIS air dryer but no air goes out to the tanks. I figured I would just replace the air dryer with a new on… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,755 satisfied customers
1994 international 4900. we have been having severe problems
1994 international 4900. we have been having severe problems with the air freezing up on it and we want to bypass the air dryer. what are the ramifications of bypassing the unit? I would much rather s… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,046 satisfied customers
I have a 2009 T800 KW day cab with isx cummins Is it possable
I have a 2009 T800 KW day cab with isx cummins Is it possable to get a diagram of the compressed air system… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
air is slow to air up. not sure how to check the unloading
air is slow to air up. not sure how to check the unloading valves or the governor. There doesn't seem to be any air leak. I can't hear anything. But I know that there is a way to test between the gove… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I am working on a 1991 Pete with a L10. I just updated the
I am working on a 1991 Pete with a L10. I just updated the dryer with a AD-9 dryer. The dryer i took off i could not identify. It looked close and had 3 lines hooked up to it like the AD-9. The proble… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,755 satisfied customers
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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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