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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 2014 international maxxforce 13. The truck is not
I have 2014 international maxxforce 13. The truck is not building any pressure at all. I changed the governor on dryer and no luck. The truck is clutch driven compressor and there is air from the gove… read more
Scott Anthony
Scott Anthony
Master Technician
HS Diploma
2 satisfied customers
Front brake air system loses 20lbs air in 2 minutes but only
Front brake air system loses 20lbs air in 2 minutes but only while running no lose of air when shut off … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
4,737 satisfied customers
I have an 1999 Peterbilt 379 with a Detroit Series 60 11 1L
Hello, I have an 1999 Peterbilt 379 with a Detroit Series 60 11 1L engine. This morning the air dryer started to purge constantly every 30 seconds. Once the pressure is built up the air dryer purges a… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I have a 93 Freightliner with a N14 Cummins motor and it
I have a 93 Freightliner with a N14 Cummins motor and it builds up too much air pressure. Governor opens to purge air dryer but doesn't seem to stop building pressure. Gets up to 200 or 230 PSI … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
Having a hard time building air. ISX 15 Cummins 2013
I am. I've put a new air dryer on, a new air compressor on changed the dryer filter, changed the dryer governor. I used shop air to check flow in all of the air lines to both tanks and pushed shop air through the signal air line … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 satisfied customers
I have a 1998 Kenworth t-600 with an n14 Cummins engine. My
I have a 1998 Kenworth t-600 with an n14 Cummins engine. My problem is in the air system. My reserve hand on my air guage drops and allows the air dryer to pop off every couple of minutes. What I noti… read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 satisfied customers
1997 peterbilt n14 celeste plus. 1997 peterbilt cummins n14
Chasing a problem for several years. Seems to me when I have an injector starting to miss the ecm will derate engine power.im not sure if this is a derate or just a power loss. … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
431 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
Triage Tech/Shop Foreman
Associates
431 satisfied customers
2000 Kenworth with Cummins n14. very low boost. when CAC
Second opinion] 2000 Kenworth with Cummins n14. very low boost. when CAC system is tested with intake makifold hose still hooked. i lose all my air from around the head gasket on the brakes compressor… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
We have air brakes on Freightliner chassis. We are getting
We have air brakes on Freightliner chassis. We are getting low air pressure out of the compressor, but it's making air. We changed governor and dryer and still can get air to tanks … read more
Roy Belding
Roy Belding
7,584 satisfied customers
2002 KW T2000 N14 Cummins engine oil is making it all the
2002 KW T2000 N14 Cummins engine oil is making it all the way to the air dryer, I noticed around and bottom of air dryer purge valve what is your opinion as far as the air compressor?… read more
cumminsdr
cumminsdr
Mechanic
High School or GED
4,300 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
4,300 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
I replaced two air compressor and still have oil coming out
I replaced two air compressor and still have oil coming out of air dryer the air dryer was serviced too … read more
spankyjr1
spankyjr1
Retired
Vocational, Technical or Trade Scho
420 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
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
2,740 satisfied customers
I am working on a 1991 Pete with a L10. I just updated the
I am working on a 1991 Pete with a L10. I just updated the dryer with a AD-9 dryer. The dryer i took off i could not identify. It looked close and had 3 lines hooked up to it like the AD-9. The proble… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,740 satisfied customers
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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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