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Thermo king APU A/C

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Martineztrucker, May 30, 2020.

  1. May 30, 2020 #1
    Martineztrucker

    Martineztrucker Bobtail Member

    3
    1
    May 30, 2020
    0
    My apu compressor kicks on and then it starts to slow down like it’s building up to much pressure I replaced the compressor and dryer and expansion valve then vacuumed the system and recharged it and it did the same thing
    Any one have an idea what it could be
     
    Martineztrucker, May 30, 2020
    Martineztrucker, May 30, 2020
    #1
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  3. May 30, 2020 #2
    BoxCarKidd

    BoxCarKidd Road Train Member

    4,185
    5,999
    Aug 26, 2014
    0
    If the pressure got to high does it not have a cut out switch?
    Could it be a fuel or other power problem with the engine?
    What are the high and low readings on the gauges?
     
    BoxCarKidd, May 30, 2020
    BoxCarKidd, May 30, 2020
    #2
  4. May 31, 2020 #4
    rtyauch301

    rtyauch301 Bobtail Member

    20
    1
    Mar 29, 2011
    Athens, Alabama
    0
    do you mean the engine rpm drops if so mine did that the lift pump failed on the apu and it couldn't get enough fuel to properly run under a load
     
    rtyauch301, May 31, 2020
    rtyauch301, May 31, 2020
    #4
  5. Jun 1, 2020 #4
    Martineztrucker

    Martineztrucker Bobtail Member

    3
    1
    May 30, 2020
    0
    It doesn’t cut off
     
    Martineztrucker, Jun 1, 2020
    Martineztrucker, Jun 1, 2020
    #4
  7. Jun 1, 2020 #5
    Martineztrucker

    Martineztrucker Bobtail Member

    3
    1
    May 30, 2020
    0
    The engine works fine till the compressor kicks in 2 mins later it starts to slow the engine down
     
    Martineztrucker, Jun 1, 2020
    Martineztrucker, Jun 1, 2020
    #5
    Motto Thanks this.
  8. Jun 1, 2020 #6
    BoxCarKidd

    BoxCarKidd Road Train Member

    4,185
    5,999
    Aug 26, 2014
    0
    What is the high side pressure?
     
    BoxCarKidd, Jun 1, 2020
    BoxCarKidd, Jun 1, 2020
    #6
    Martineztrucker Thanks this.
  9. Jun 6, 2020 #7
    Motto

    Motto Light Load Member

    102
    125
    Apr 10, 2020
    0
    Your engine is not making enough power. Could be many things...
     
    Motto, Jun 6, 2020
    Motto, Jun 6, 2020
    #7
    Martineztrucker Thanks this.
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