Medium and Heavy Trucks

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I have volvo d13 semi truck, they change the air dryer and
Hello i have volvo d13 semi truck , they change the air dryer and truck is releasing air every 30 sec park or while driving its so annoying , they told me from the shop could be the fan clutch hub??? … read more
Nich1019
Nich1019
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Vocational, Technical or Trade School
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Have a 91 kw. Had to replace the air dryer. The air dryer
Have a 91 kw. Had to replace the air dryer. The air dryer will not purge and i am building in excess of 170 lbs of air pressure. … read more
Joe Green
Joe Green
65 satisfied customers
I have a 2013 367 with a Paccar engine. The air compressor
I have a 2013 367 with a Paccar engine. The air compressor doesn't unload . It pumps up to around 150 psi the the safety relief on the dryer pops open . … read more
Joe Green
Joe Green
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I have a 2014 CXU613 that builds air pressure and looses it
Mike I have a 2014 CXU613 that builds air pressure and looses it for no apparent reason. Changed filter and Purge Valve. No leaks anywhere from lines. It looses air while just idling with no one in th… read more
Joe Green
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65 satisfied customers
I have a 1998 peterbuilt with a 8.3 cummins. Vin number is
I have a 1998 peterbuilt with a 8.3 cummins. Vin number is ***** my Truck will not build over 60 psi of air pressure. Almost As soon as a start the truck i have air passing through the exhaust of the … read more
Wayne
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Vocational, Technical or Trade Scho
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Not building any air in my system, change air compressor,
Not building any air in my system, change air compressor, new dryer and governor. … read more
BrentR718
BrentR718
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2017 Volvo Semi Truck vin# ***************** I need the
2017 Volvo Semi Truck vin# ***** I need the location of the governor and the air dryer for the air compressor. Diagrams and or pictures will be really appreciated as I can't find them and not sure wha… read more
Bradey V
Bradey V
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Can you put thr wrong air gov on a c15 cat engine. Air
Can you put thr wrong air gov on a c15 cat engine. Air pressure only building up tp 30 psi … read more
Curtis B.
Curtis B.
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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
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I have a 1988 pet engine but air build up really slow. 1988
i have a 1988 pet(###) ###-#### engine but air build up really slow … read more
spankyjr1
spankyjr1
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Vocational, Technical or Trade Scho
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I have a brake system question on my 2007 Volvo truck. The
I have a brake system question on my 2007 Volvo truck. The air brake system builds to 135 psi fine. However, during operation of the brakes the pressure quickly goes down to 95-100 psi. It's at this p… read more
Mike Mcmillan
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1999 kenworth t600 Cummins n14 red top. Air compressor not
1999 kenworth t600 Cummins n14 red top. Air compressor not building air pressure pass 20 pounds. Replaced compressor and it's the same. Air not coming out from the hole that goes to. The governor.… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 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
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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
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1999 international 4900 DT466e I cannot seem to get my air
1999 international 4900 DT466e I cannot seem to get my air compressor to build air. There is no air coming to my tanks it seems but the main line off of the compressor and going to the air dryer is ge… read more
spankyjr1
spankyjr1
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I have a problem with a Kenworth T600, Its a 1997 tractor trailer
I have a problem with a Kenworth T600, Its a 1997 tractor trailer truck. The compressor does not go into unloaded stage long enough to cool and the air dryer unloads about every 30 seconds. The compre… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
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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
420 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
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

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I am ASE Master Truck Certified.

Wayne

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

Jeremy

Jeremy

Certified Truck/Bus Technician

2,756 satisfied customers

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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Curtis B.

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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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