Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
I have a 2016 Freightliner Cascadia. The secondary air
I have a 2016 Freightliner Cascadia. The secondary air pressure is dropping with the depression of the service brake pedal. The secondary pressure only builds up to about 110 psi. I can hear a constan… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
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
10,510 satisfied customers
Name is Toqeer and question I have is.. 2017 Freightliner
Hey My name is ***** ***** question I have is.. 2017 Freightliner cascadia DD15 purge air every 20 seconds, Can you please help me to understand what that could be? Air Dryer, Governor or something el… read more
Brent Goodnoe
Brent Goodnoe
4 satisfied customers
2010 Peterborough want built air on secondary side. 2010
2010 Peterborough want built air on secondary side … read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
51 satisfied customers
I have a 2015 freightliner 114sd dump truck (vin number
I have a 2015 freightliner 114sd dump truck (vin number 3ALHG3DV9GDHG0566) the primary air tank is very slow to build with truck running, the secondary builds to 135 psi quickly and dryer pops off, wh… read more
Expert
Expert
10,510 satisfied customers
I have an 04 Mack cv713 the primary air system keeps
I have an 04 Mack cv713 the primary air system keeps building air well past 140 but the secondary only builds up to 130 and takes about 20 minutes to build that much I've replaced the governor and the… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
My 2020 cascadia is loosing air in secondary tank but only
My 2020 cascadia is loosing air in secondary tank but only when driving have had truck in multiple shops can't find it doesn't leak while sitting … read more
Mikael
Mikael
Bachelor's Degree
150 satisfied customers
Name is will my primary air gauge gets up to around 60psi
Hey my name is ***** ***** primary air gauge gets up to around 60psi but my secondary is around 100 I drained the tanks already primary still got around 50-70 but then drops when I hit the brakes … read more
james Roberts
james Roberts
Maintenance assistant
Vocational, Technical or Trade School
3 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
Owner Brothers Restoration/Troubleshoot
AutoDiesel Technology
2,445 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
10,510 satisfied customers
The air brake pressure on my 1998 Freightliner is slow to
The air brake pressure on my 1998 Freightliner is slow to build and when I apply the brake while the engine is running, the air pressure drops to 60psi within 15 pedal pumps. Too fast. I don't hear an… read more
Expert
Expert
10,510 satisfied customers
Eng 0 abs 11 fail 14 spn 810 code. Also secondary air tank
Eng 0 abs 11 fail 14 spn 810 code. Also secondary air tank loses air during drive, and not building over 100 psi. … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
14,490 satisfied customers
Freightliner Columbia 2010 with Detroit Series 60 Air drier
Freightliner Columbia 2010 with Detroit Series 60 Air drier assembly and air governor have both been replaced twice. Both primary and secondary air gauges going to 150 psi Air from air drier purges fo… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
571 satisfied customers
Have a 2004 Coumbia day cab changed air dryer govener and
have a 2004 Coumbia day cab changed air dryer govener and compressor both gauges build to 120 bottom gauge loosing lot of preasure when air dryer pops of … read more
Expert
Expert
10,510 satisfied customers
Air dryer started purging every minute and a half or so. No
Air dryer started purging every minute and a half or so. No loss in pressure. Swapped the air dryer and new governor. Started doing that I'm very cold weather. Still doing the same thing after new par… read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,636 satisfied customers
I have a 2007 kenworth t800. I won't build air pressure in
Hello I have a 2007 kenworth t800. I won't build air pressure in tanks. But the pop off valve keeps popping off every 15 seconds. Compressor pumps fine. What could be the problem?… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,947 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
Have an 04 Freightliner Century with a Detroit 60 series.
Have an 04 Freightliner Century with a Detroit 60 series. The secondary tank keeps dumping air. I have replaced the cluth fan (first diagnosis) the Turbo (second diagnosis) and the Compressor (the thi… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

14,490 satisfied customers

Owner at DJ Wilson

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I am ASE Master Truck Certified.

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worked on, Gmc, Macks, Freight liner,Mercedes Benz,,Ford, sterling

Jeremy

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ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

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cumminsdr

cumminsdr

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All types of Cummins applications

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Chris (aka-Moose)

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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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