Medium and Heavy Trucks

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2000 Ud 2000 in my air pressure gauge the needle is at 120
2000 Ud 2000 in my air pressure gauge the white needle is at 120 psi while my orange needle is building up slowly and is at 92 psi … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,969 satisfied customers
I have a 2014 peterbilt here the vin ***************** the
I have a 2014 peterbilt here the vin ***************** the air build up bt won't build air in the second tank I think maybe a valve not sure how troubleshoot this… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 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 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
7,468 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
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
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
Shop Foreman/Triage Tech
Associates
3,969 satisfied customers
Ac not cold and found o ring leak at condensor. I'm working
Ac not cold and found o ring leak at condensor. I'm working on a 2013 Pete 550 HP 379. Evacuating and recharged. Now cold outlet temp and cycling. High side only 90#..low side cycle between 26 and 40 … read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
3,969 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
Shop Foreman/Triage Tech
Associates
3,969 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
7,468 satisfied customers
I have an 07 Peterbilt with a cat engine. My air gauges are
I have an 07 Peterbilt with a cat engine. My air gauges are not going up. The buzzer is going off. Both primary and secondary. What is the first step… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
207 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
I have a Paccar/Cummins PX8/ISC motor that wont build air. I
I have a Paccar/Cummins PX8/ISC motor that wont build air. I have changed the air dryer filter, the air governor but still builds air real slow. I was going to put a new compressor on. Is there anythi… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 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
I have a 2008Pete with a C-13 in it. The secondary tank will
I have a 2008Pete with a C-13 in it. The secondary tank will build air but the primary wont. After the secondary hits 90 psi, the primary will slowly build, but never to reach even 90psi. What to look… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
we have a 2007 pete having trouble with air ride suspension
we have a 2007 pete having trouble with air ride suspension when step on gas pedal load gauqe goes down 15 lbs when step on break load gauge goes up 15 lbs on the truck frees it self up and rolls easy… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
hi mate,ive got a customer with a 2011 fuso heavy with air
hi mate,ive got a customer with a 2011 fuso heavy with air pressure problems.The primary tank builds up to 6bar but the secondary tank will not build up pressure.there is no external air leaks on the … read more
Steve
Steve
Self Employed
High School or GED
30 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
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Daniel Wilson

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Jeremy

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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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