Medium and Heavy Trucks

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Related Medium and Heavy Trucks Questions
Off and on power to AC compressor. 2011 freightliner
Off and on power to AC compressor JA: The car Mechanic will know what to do about your ac compressor. Do you have any other details that could be helpful? Customer: 2011 freightliner cascadia dd13 JA:… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
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
5,115 satisfied customers
I have a 2003 Mack Granite and the truck is not cooling
I have a 2003 Mack Granite and the truck is not cooling enough, the A/C compressor turns on and the proportioning valve is cold, what could it be?… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
Kenworth T660 ac work ok on idle when on road high rpm it
Kenworth T660 ac work ok on idle when on road high rpm it will not work . So I out truck kn high rpm and found low side line freezing near evaporator and expansion valve the thick line coming from ac … read more
Andy
Andy
Truck Diagnostic Technician
Vocational, Technical or Trade School
3,030 satisfied customers
I'm having with air pressure on a 379 Pete with vin #
I'm having with air pressure on a 379 Pete with vin # ***************** it's only building 90 psi on primary side no air leaks and I have tried a new compressor, still 90 psi no secondary at all no ai… read more
Mike Mcmillan
Mike Mcmillan
Triage Tech/Shop Foreman
Associates
561 satisfied customers
I am working on an a/c in a peterbilt. The low pressure is
I am working on an a/c in a peterbilt. The low pressure is getting to 85 then the fan kicks me n and drops it to 67 then fan kicks out and pressure rises again. I've installed new compressor accumulat… read more
Wayne
Wayne
Journeyman
Vocational, Technical or Trade Scho
5,115 satisfied customers
I have 2005 frieghtliner m2. AC not working, when i remove
hi i have 2005 frieghtliner m2. AC not working, when i remove the evaporator discharge temp sensor and worm it up with my hand ac works but as soon as i install it back in then stops working. new expa… read more
Expert
Expert
10,503 satisfied customers
Air dryer started purging every minute and a half or so. No
Air dryer started purging every minute and a half or so. No loss in pressure. Swapped the air dryer and new governor. Started doing that I'm very cold weather. Still doing the same thing after new par… read more
Don
Don
fleet superintendent
Vocational, Technical or Trade Scho
1,636 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
2005 pete 387 ac blowing hot had a tech at TA truck stop
2005 pete 387 ac blowing hot had a tech at TA truck stop check it pumped the system down held a -30 for 30 min. charged it with 4 lb 134a tech said that was all it takes but it still blows hot air he … read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
6,062 satisfied customers
Buddy my name is ***** ***** have big truck shop i working on
hi buddy my name is ***** ***** have big truck shop i working on a frightliner came with a/c compressor locking up i replaced with new compressor expenions value dryer flushed system pulled vac and st… read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
2000 peterbilt 379 n14. I went in the truckstop ac was blowing
2000 peterbilt 379 n14. I went in the truckstop ac was blowing cold but my engine temp was high like my truck was running hot when I got back. I cut my engine fan on to cool the engine down but now I … read more
Jeremy
Jeremy
Certified Truck/Bus Technician
Associate Degree
2,756 satisfied customers
Jeremy ,my question is I have a 2007 columbia and the a/c works
Jeremy ,my question is I have a 2007 columbia and the a/c works when sitting still but it stops working after you start driving down the road freon level has been check .evac and recharge just to make… read more
Expert
Expert
10,503 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 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
5,115 satisfied customers
i am working on a volvo 770 semi. ive replaced the compressor
i am working on a volvo 770 semi. ive replaced the compressor , the condenser , both expansion valves, dryer, and a couple lines. truck holds 3.7 lb. of r134. when i get 1lb. in it the low pressure is… read more
tkman55
tkman55
Shop manager Trailer Refrigeration shop
138 satisfied customers
Freightliner columbia: I am working on a freightliner columbis,the
I am working on a freightliner columbis,the cold line from the sleeper A/C to the compressor is freezing up and I am not getting freon circulating through the cab evaporator. I have individually flush… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
I have a 96 kenworth t 800 with a n14 select plus in it and
i have a 96 kenworth t 800 with a n14 select plus in it and the air conditioning with a full charge with pull 25 inchs of vacuum and not get cold. what could possibly be the problem the compressor?… read more
diesel-tech
diesel-tech
Owner of landrys truck repair llc
136 satisfied customers
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Daniel Wilson

Daniel Wilson

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

Jeremy

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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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