Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Connect one-on-one with {0} who will answer your question

Related Medium and Heavy Trucks Questions
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
Won't build air pressure at idle..but will up if I rev up
Won't build air pressure at idle..but will up if I rev up rpm to alittle over 1500..and secondary tank won't hold over 90psi while driving & will drop to 60 psi at idle … read more
james Roberts
james Roberts
Maintenance assistant
Vocational, Technical or Trade School
3 satisfied customers
I have a 2015 freightliner sd114. After 15 minutes I lose
I have a 2015 freightliner sd114. After 15 minutes I lose about 60lbs of air. I have replaced the air dryer already. I can not hear or see any air leaking. Sprayed with soapy water. Any thoughts? Vin … read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
I have a 97 isuzu frr 7.1 turbo diesel cabover box truck.
Hi i have a 97 isuzu frr 7.1 turbo diesel cabover box truck. Over the past few years it has had a slight hissing sound coming from the foot brake pedal assembly. Had the lines for leaks but there were… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 satisfied customers
Where is the speed sensor located on a freightliner Columbia
where is the speed sensor located on a freightliner Columbia 2007 … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 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
1,070 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
4,737 satisfied customers
Secondary air gauge.. Hit a bump and it says it loses
Secondary air gauge.. Hit a bump and it says it loses pressure I've checked both tanks and they are full … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
398 satisfied customers
I build 120 on both primary and secondary tanks than when I
I build 120 on both primary and secondary tanks than when I idle secondary lpressure stedely drops have replaced pressure protection valve air compressor governor one way check valve three air bags th… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 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
7,458 satisfied customers
My 2007 Columbia with Detroit is losing air in secondary
my 2007 Columbia with Detroit is losing air in secondary tank when you drop back to idle. holds air fairly well when I shut off engine but drops quickly when running … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I have a cat c7 acert that has a code 63 and goes into limp
I have a cat c7 acert that has a code 63 and goes into limp mode when I come to a stop and goes back out shortly after I take off and it goes back to fullpower. … read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
2004 Freightliner Columbia with a Cat C-15 Bridge (MBN
2004 Freightliner Columbia with a Cat C-15 Bridge (MBN series, single turbo) engine has no power thru the gears, but most noticeably from 7th on up to 10th. Problem initially started when the truck bl… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 2001 Kw with c15 475 cat with a loss of power. No
I have a 2001 Kw with c15 475 cat with a loss of power. No check engine light, no obvious noises for a missing cylinder. Idles and runs perfectly just a loss in overall power and acceleration. No fuel… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have Freightliner Columbia 2006 with Mercedes Benz engine
I have Freightliner Columbia 2006 with Mercedes Benz engine and now come to the problem I am losing air from secondary tank when i go downhill and or put engine break When i go downhill and speed incr… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
4,361 satisfied customers
I have a 2008 freightliner m2 106 SportChassis with 6 speed
I have a 2008 freightliner m2 106 SportChassis with 6 speed Allison and 8.3 cummins isc engine. Unit only has 14000 miles on it. When I coast slowly, foot off brake,no throttle, engine starts to run v… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have a 2003 International 9200i tandem semi tractor. When
I have a 2003 International 9200i tandem semi tractor. When the truck is running it loses about 5psi per minute secondary air and the air compressor will not load until the secondary air reaches appor… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
my turbo has air leak from the waste gate, cans that be replaced
my turbo has air leak from the waste gate, cans that be replaced or do i have to rep-lace the whole turbo. my other issue is that before i replaced the air line from the copmpressor i would loose air … read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
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.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Daniel Wilson

Daniel Wilson

4,737 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,234 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

4,023 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

4,361 satisfied customers

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

cumminsdr

cumminsdr

Mechanic

1,700 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

1,571 satisfied customers

Technician turned service manager on multiple lines of trucks and engines, used in industry.

Chris (aka-Moose)

Chris (aka-Moose)

Technician

353 satisfied customers

24 years of experience diagnosing & repairing

< Previous | Next >

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.

Show MoreShow Less

Ask Your Question

x