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Ac issues

Discussion in 'International Forum' started by roadglide547, Jun 6, 2015.

Page 1 of 2
  1. Jun 6, 2015 #1
    roadglide547

    roadglide547 Bobtail Member

    8
    0
    Jun 6, 2015
    0
    Hi all,
    I am having a problem with a 1998 international 9100 day cab ac,
    At the beginning of the day the ac works fine , then as the day goes on it quits working , so far I have replaced the
    Compressor
    Dryer
    Ac thermostat
    Expansion valve
    And the high pressure switch on the compressor to condenser hose.
    I have put 3 pounds of freon in it ( I think that's what it calls for ). I have been trying to learn ac repair and I usually don't have this much trouble but I am at wits end and the driver is getting upset, any help would be great
    Thanks
     
    roadglide547, Jun 6, 2015
    roadglide547, Jun 6, 2015
    #1
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  3. Jun 6, 2015 #2
    SCtruckerdude

    SCtruckerdude Bobtail Member

    45
    38
    Oct 17, 2013
    0
    I had similar problems in one of the company trucks I drove. Company told me to take it to a TA to get it checked. They said the fan clutch was slipping. The company told me to bring it in to a terminal for repairs but ended up giving me another truck because they didn't have the part and didn't want me waiting around. Not sure if that fixed it or what.
     
    SCtruckerdude, Jun 6, 2015
    SCtruckerdude, Jun 6, 2015
    #2
  4. Jun 6, 2015 #3
    tnevin225

    tnevin225 Road Train Member

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    1,600
    Jan 1, 2014
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    Are you putting a vacuum on the system or just adding freon?
     
    tnevin225, Jun 6, 2015
    tnevin225, Jun 6, 2015
    #3
  5. Jun 6, 2015 #4
    Heavyd

    Heavyd Road Train Member

    7,626
    6,027
    Feb 4, 2009
    0
    High pressure switch, low pressure switch, wiring somewhere...
     
    Heavyd, Jun 6, 2015
    Heavyd, Jun 6, 2015
    #4
  7. Jun 6, 2015 #5
    Ridgeline

    Ridgeline Road Train Member

    20,732
    101,022
    Dec 18, 2011
    Michigan
    0
    Too much freon. Bring it to a shop that specializes in ac systems.
     
    Ridgeline, Jun 6, 2015
    Ridgeline, Jun 6, 2015
    #5
  8. Jun 6, 2015 #6
    pop's

    pop's Light Load Member

    54
    16
    Feb 3, 2013
    Yulee FL.
    0
    Change the a/c clutch
     
    pop's, Jun 6, 2015
    pop's, Jun 6, 2015
    #6
  9. Jun 6, 2015 #7
    Shaggy76

    Shaggy76 Heavy Load Member

    831
    304
    Feb 22, 2012
    Orlando, FL
    0
    Does the 98 have the thermistor system on it? It will look like this.

    It's been awhile since I worked on a 98 and my stupid password is locked on the evlaue Navistar site because I put the wrong one in too many times today on another truck I was working on so I can't look it up. If it has these, they are 90% of the time the fault. The other 10%, I will need to hook gauges to it to see what is going on.

    Since you are tryint to leanr AC, hold onto this document. You will use it and it comes in quite helpful.
     
    Shaggy76, Jun 6, 2015
    Shaggy76, Jun 6, 2015
    #7
  10. Jun 7, 2015 #8
    roadglide547

    roadglide547 Bobtail Member

    8
    0
    Jun 6, 2015
    0
    I recovered it and vacuumed it for 1 hour , replaced the ac clutch , I work for a nation wide fleet carrier if I can't figure it out I have too send it to the main shop , I would rather not let some one else do it , I would like to learn it
     
    roadglide547, Jun 7, 2015
    roadglide547, Jun 7, 2015
    #8
  11. Jun 7, 2015 #9
    roadglide547

    roadglide547 Bobtail Member

    8
    0
    Jun 6, 2015
    0
    Just replaced the Kysor fan hub assembly a couple months ago, the high pressure switch, that's the one on the ac hose from the compressor to the evaporator ?
     
    roadglide547, Jun 7, 2015
    roadglide547, Jun 7, 2015
    #9
  12. Jun 7, 2015 #10
    roadglide547

    roadglide547 Bobtail Member

    8
    0
    Jun 6, 2015
    0
    I will recover again Monday re vacuum and double check the cooling fins on the evaporator ,
    Thanks everyone so far for the help
     
    roadglide547, Jun 7, 2015
    roadglide547, Jun 7, 2015
    #10
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