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Related Medium and Heavy Trucks Questions
My secondary air gauge isn't building pressure. 2015
I checked the hoses under the hood and no air is flowing but the primary is filling normal … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,194 satisfied customers
I have a 2004 freightliner columbia that started losing air
I have a 2004 freightliner columbia that started losing air pressure driving down the highway.Then once I parked it built up again and now it's losing pressure while I'm sitting.Any suggestions? … read more
Keiphun Sowell
Keiphun Sowell
AutoDiesel Technology
974 satisfied customers
I checked the wet tank for a check valve and it doesn't have
Second opinion] Hello I checked the wet tank for a check valve and it doesn't have one and I didn't see any sign of one on the dryer from the dryer to the compressor or the dryer to the wet tank how m… read more
Expert
Expert
7,397 satisfied customers
I have a 2005 Freightliner Columbia not building air
I have a 2005 Freightliner Columbia not building air pressure to the second tank also. I have put in a new compressor, governor, and check valve. Don't find any leaks anywhere... … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,194 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
388 satisfied customers
My 2015 Freightliner cascadia evolution have air pressure
My 2015 Freightliner cascadia evolution have air pressure problem ...so basically when i start my truck it build up pressure all the way to 135 psi(both gauges) then during driving slowly (when im app… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,194 satisfied customers
I just installed an air dryer on a 2001 century class
I just installed an air dryer on a 2001 century class Freightliner. In front of the air tank but it will only build up air on secondary side, what could be wrong … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,194 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
388 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
388 satisfied customers
2016 Freightliner Cascadia DD15. The secondary tank will not
2016 Freightliner Cascadia DD15. The secondary tank will not build up air as fast as the primary. Have replaced the air drier and checked for leaks.… read more
Expert
Expert
7,397 satisfied customers
2015 cascades secondary air pressure builds to 125 then
2015 cascades secondary air pressure builds to 125 then leaks down to 100 within 30 seconds … read more
Expert
Expert
7,397 satisfied customers
Primary air tank no air Freightliner Columbia. Freightliner
What is the complete model and serial number of your machine?Customer: Freightliner Columbia last 6 vin is x78386… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,194 satisfied customers
Have a 2009 freightliner m2 business class.primary air
have a 2009 freightliner m2 business class.primary air building slowly but secondary buils up fine. any theories on the problem? … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,194 satisfied customers
Wayne 2014 kentworth has the new bendix air dryer with the
Wayne 2014 kentworth has the new bendix air dryer with the short filter it builds air pressure and air dryer purges showing that the tanks are full, but the secondary never does. I disconnect the air … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Im having a problem building air pressure. It will not get
Hey im having a problem building air pressure. It will not get about 30psi. I changed d2 governor and still no pressure. Has s code 6H 164. Can u please help me … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
11,194 satisfied customers
My 04 freightliner isn't building secondary air. Its a 3 tank
My 04 freightliner isn't building secondary air. Its a 3 tank system with an automatic trans… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
Freightliner M2 business class air pressure wont pass 80ps
Freightliner M2 business class.... air pressure wont pass 80psi at idle with new compressor, new governor, air dryer , rear brake chamber...if I rev the truck it wld build and purge ... but after the … read more
Toby
Toby
Vocational, Technical or Trade Scho
107 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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