Medium and Heavy Trucks

Have truck repair questions? Ask an Expert

Ask an Expert,
Get an Answer ASAP!

Related Medium and Heavy Trucks Questions
I have a 2005 kenworth that will not build up air pressure.
I have a 2005 kenworth that will not build up air pressure. The air pump is pumping air and air is going to the dryer… read more
Steven
Steven
Triage Tech/Shop Foreman
Associates
11 satisfied customers
Looking for a diagram for air system on a 2005 Frieghtliner
looking for a diagram for air system on a 2005 Frieghtliner colimbia … read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,615 satisfied customers
2011 mach cxu613 does not build air pressure only 50 psi.
2011 mach cxu613 does not build air pressure only 50 psi . New governor same issue don't hear leaks from compressor discharge line or any major leaks… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
When I done the airbags on my truck to dump the dirt out of
When I done the airbags on my truck to dump the dirt out of it and once the air pressure gets low I turn my airbags back on the compressor won't build air if I shut the truck off for about 10 or 15 mi… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 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
2,803 satisfied customers
My '07 Kenworth W900 will not build air pressure. I had a similar
My '07 Kenworth W900 will not build air pressure. I had a similar problem last fall and replaced the air dryer with a reman air dryer (Bendix AD-IS) and new governor. That fixed the problem. A few wee… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 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
2,892 satisfied customers
I was on vacation last week and i started my engine this
Customer: hi i was on vacation last week and i started my engine this morning ( cummins isx 565 hp ) and air pressure do not built, no pressure at all. … read more
Curtis B.
Curtis B.
Technician
Associate Degree
32,696 satisfied customers
1994 International 4900 with DT466 The truck has a new air
1994 International 4900 with DT466 The truck has a new air compressor and a new dryer. We are getting copious amounts of water in the tanks and cant figure out why. We also go through governors more t… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
I have a Smith 100 tow behind air compressor that i cant get
I have a Smith 100 tow behind air compressor that i cant get to run right. It uses a ford 302 v8, half the cylinders are the compressor side. When i first bought it, it would build pressure to around … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
2,803 satisfied customers
1994 International 4900 wont build air pressure in cold.
1994 International 4900 wont build air pressure in cold. This is the only one of our trucks that has this problem and actually has the newest air compressor in the fleet. We drain the tanks religiousl… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
2,892 satisfied customers
air pressure will not build over 20 psi motor home 1996 cummins
air pressure will not build over 20 psi motor home 1996 cummins winnabago set about two months fine when parked been cold… read more
Curtis B.
Curtis B.
Technician
Associate Degree
32,696 satisfied customers
I have a 2009 freightliner columbia cl120 with a Detroit engine
I have a 2009 freightliner columbia cl120 with a Detroit engine DD15 and my question is I can't build enough air I'm getting air in my air bags both truck and trailer but I'm only going up to 100 psi … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,243 satisfied customers
Have a 99 internatipnal with cummins celect plus...engine fan
Have a 99 internatipnal with cummins celect plus...engine fan wrks fine when turn key on and truck is not running but as soonas engine starts fan will not disengage… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
696 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
696 satisfied customers
i have a 1998 Freightliner unable to build over 50 pounds air
i have a 1998 Freightliner unable to build over 50 pounds air pressure for operation. unable to find any leaks. when engine shut down, the systems does not bleed off pressure. we pulled line off compr… read more
DirectInjection
DirectInjection
Field Service
Diplom
56 satisfied customers
08 INTERNATIONAL AIR COMPRESSOR WILL NOT BUILD MORE THEN 15
08 INTERNATIONAL AIR COMPRESSOR WILL NOT BUILD MORE THEN 15 PSI, THEN QUITS ALL TOGETHER. NO LEAKS FOUND ANY KNOWN PROBLEMS… read more
tractordoc65
tractordoc65
heavy equipment mechanic
Vocational, Technical or Trade Scho
1 satisfied customers
08 ford f 650 6.7 cummins flat bed tow truck , developed low
08 ford f 650 6.7 cummins flat bed tow truck , developed low air pressure for a moment while driving , pulled over reved to 12oo and pressure built back,. Sat overnight and would not build pressure . … read more
JANECZFJ
JANECZFJ
158 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

2,803 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

4,530 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

2,892 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,243 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, EPA 608/609 HVAC Certified, Steering/Suspension and ABS/Brakes Technician

cumminsdr

cumminsdr

Mechanic

1,351 satisfied customers

All types of Cummins applications

Curtis B.

Curtis B.

Technician

32,696 satisfied customers

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

dieseldan55

dieseldan55

Contractor

74 satisfied customers

Road Service mechanic for Volvo Construction.

< 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