Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
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 2015 KW T800 that was not building secondary air.
I have a 2015 KW T800 that was not building secondary air. changed the AD filter and governor. Now both the pri/sec air build to about 95 psi and stops. The other thing I noticed is that the air build… read more
Nich1019
Nich1019
Diesel Technician
Vocational, Technical or Trade School
40 satisfied customers
I have a class A motor home with a Series 60 and air
I have a class A motor home with a Series 60 and air pressure won't build over 75psi. Brakes release but turbo won't kick in and can only get 30 mph. Change air dryer and no success, bypass dryer non … read more
Expert
Expert
10,503 satisfied customers
If I disconnect the Bendix ADIS air dryer from my Peterbilt
If I disconnect the Bendix ADIS air dryer from my Peterbilt chassis - how can I control the the air compressor govenor manually if the Bendix ADIS system is removed (which has a govenor built into it?… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
Air system problem new compresser and air dryer air feeds
air system problem new compresser and air dryer air feeds into the main tank but will not feed into other tank … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
No air I changed air dry still no air checked it with a
No air I changed air dry still no air checked it with a gauge going into air dryer at only 70 psi but no higher … read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 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
561 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 an international prostar vin BN195258 I'm having air
Hello i have an international prostar vin BN195258 I'm having air issues on my truck. Just couple days ago i had 30lbs of air pressure and we called out a tech on the road. They ended up replacing the… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 satisfied customers
The air brake pressure on my 1998 Freightliner is slow to
The air brake pressure on my 1998 Freightliner is slow to build and when I apply the brake while the engine is running, the air pressure drops to 60psi within 15 pedal pumps. Too fast. I don't hear an… read more
Expert
Expert
10,503 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
561 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
1,886 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
5,115 satisfied customers
I have a 2007 kenworth t800. I won't build air pressure in
Hello I have a 2007 kenworth t800. I won't build air pressure in tanks. But the pop off valve keeps popping off every 15 seconds. Compressor pumps fine. What could be the problem?… read more
Curtis B.
Curtis B.
Technician
Associate Degree
1,947 satisfied customers
I have a 2009 T800 KW day cab with isx cummins Is it possable
I have a 2009 T800 KW day cab with isx cummins Is it possable to get a diagram of the compressed air system… read more
Andy
Andy
truck /coach technician
Vocational, Technical or Trade School
214 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
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
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
4,370 satisfied customers
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Meet the Experts:

Daniel Wilson

Daniel Wilson

6,062 satisfied customers

Owner at DJ Wilson

Cat Man

Cat Man

Cat Engine Expert

5,353 satisfied customers

I am ASE Master Truck Certified.

Wayne

Wayne

Journeyman

5,115 satisfied customers

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

Jeremy

Jeremy

Certified Truck/Bus Technician

4,370 satisfied customers

ASE Med/HD Truck Technician, NATEF Diesel Engines and Electrical/Electronics Technician, Network Engineer specializing in CAN faults, Aftertertreatment, and vehicle communications

Curtis B.

Curtis B.

Technician

1,947 satisfied customers

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

cumminsdr

cumminsdr

Mechanic

1,886 satisfied customers

All types of Cummins applications

Chris (aka-Moose)

Chris (aka-Moose)

Technician

641 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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