Medium and Heavy Trucks

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98 Pete n 14 select. it's slow about building air .will not
98 Pete n 14 select. it's slow about building air .will not build air at idle. Replaced dyrer.and governor. Pulled the intake pipe loose and the compressor is sucking air .pulled the main line off com… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
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
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have a 2015 international with a Cummins isx.The air
Hello, I have a 2015 international with a Cummins isx.The air system was building up too much air pressure so 3 days ago I replaced my air dryer and govenor with a rebuilt from napa and It fixed the p… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
Truck Vin H72526 cummins ism air compressor part number..
Truck Vin H72526 cummins ism air compressor part number.. problem started a couple days ago..truck would build way too much pressure 140+ psi. I changed the governor out and it built and stayed perfec… read more
Mike Mcmillan
Mike Mcmillan
Shop Foreman/Triage Tech
Associates
4,098 satisfied customers
Have a 2012 Volvo. Once the air psi build up and the dryer
Have a 2012 Volvo. Once the air psi build up and the dryer spits off. It will continuously spit air off every 15 to 20 seconds. Why can cause this? I have already changed the dryer housing and filter.… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
Will not build air pressure above 60 lbs. New compressor and
Will not build air pressure above 60 lbs. New compressor and govenor … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
2010 peterbilt 397 cummins isx, truck is not building
truck is not building pressure at iddle not even if i hit the gas pedal i replace the air dryer witha new one, replace the hose line on the air governor and the discharge line also … read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 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
4,737 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
4,023 satisfied customers
Building pressure of up to 150 pounds, replaced governor.
building pressure of up to 150 pounds, replaced governor. thimble and seal seem to be ok. anything else I should check?… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,571 satisfied customers
Looking expert 2000 kenworth detroit series 60 it was not
looking for a expert for a 2000 kenworth detroit series 60 it was not pumping air over 50 psi.i found main airline had a hole in it,i changed line now its pumping to much air it pumps up 150 psi i cha… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 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
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
2,740 satisfied customers
yes i have a07 m2 frieghtliner is slow to build air and will
yes i have a07 m2 frieghtliner is slow to build air and will onley get to 80 psi have put new compressor new air dryer cartridge new tank with check valve… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
I have a 2004 Pete 387 with a cummins ISX, Where is the air
I have a 2004 Pete 387 with a cummins ISX, Where is the air dryer located? I parked it and now it will not build any air. The compressor appears to be working.And I bought a new gonernor. But can't fi… read more
Jim
Jim
Diesel tech.
212 satisfied customers
I changed out my governor and now I notice that my air dryer
I changed out my governor and now I notice that my air dryer does not go off. But I have three air tanks and one of them has a release at the back of it and it goes off when the air dryer is supposed … read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
4,023 satisfied customers
I have a 2001 FL 60 300 hp cat air ride, air cab and seats,
I have a 2001 FL 60 300 hp cat air ride, air cab and seats, 89000 miles. I am not getting any air pressure build up. I can take and hook my shop compressor to the air supply and it will build up press… read more
Cat Man
Cat Man
Cat Engine Expert
Vocational, Technical or Trade Scho
5,234 satisfied customers
I have a 2007 Cummins ISM, and the air compressor will not
I have a 2007 Cummins ISM, and the air compressor will not unload. I have tried three new governors, and replaced the head (which houses the unloader valve). I checked the discharge line, and all actu… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
1,700 satisfied customers
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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

2,740 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

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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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