Medium and Heavy Trucks

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Bendix ba-921 air compressor not building air. 2007
Yes. Currently have the D-2 governor removed from compressor. Made no change to the symptoms. … read more
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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
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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
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O4 freightliner Columbia series 60 Detroit. Engine whistles while idling … read more
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I have a 2007 Freightliner Columbia. Air is constantly
I have a 2007 Freightliner Columbia. Air is constantly bleeding through the purge valve on bottom of the dryer. Am on the side of the road. … read more
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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
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I have a question ... 2009 Detroit series 60 air compressor
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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
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I'm idling and my air pressure drops I have a new dryer no
I'm idling and my air pressure drops I have a new dryer no air leaks compressor almost new new governor … read more
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2011 Peterbilt 320. Slow to build air pressure. Won't build
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Daniel Wilson
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I have a 2012 KW T800 with 525 cummins. Wont build air. The
I have a 2012 KW T800 with 525 cummins. Wont build air. The compressor is pumping air to the ADIS air dryer but no air goes out to the tanks. I figured I would just replace the air dryer with a new on… read more
Jeremy
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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
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2009 freightliner Coronado. Randomly looses air, can't hear
2009 freightliner Coronado. Randomly looses air, can't hear any leaks. Put a new govenor and dryer filter on. Once it drops to 80 it will rebuild. Sometimes it doesn't rebuild and have to shut truck o… read more
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Looking expert 2000 kenworth detroit series 60 it was not
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I have 2010 Freightliner cadcadia dd15 , having problems with
I have 2010 Freightliner cadcadia dd15 , having problems with air not building up, secondary usually builds first , dryer pops Off when secondary air builds up, replaced dryer , check valve on 3rd tan… read more
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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
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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
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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
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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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