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Thermo King coolant leak

Discussion in 'Refrigerated Trucking Forum' started by vinsanity0, Nov 10, 2018.

  1. Nov 10, 2018 #1
    vinsanity0

    vinsanity0 Light Load Member

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    Jun 26, 2016
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    We've had this problem with two trailers. Older units. They run fine, but when shut off they leak coolant. No leaking at all while running.

    Had TK in Albuquerque check this one out .They couldn't find a leak. They replaced the cap but that didn't fix it.

    Is this just a coincidence that both Thermo Kings do this? Is there something we are doing wrong?
     
    vinsanity0, Nov 10, 2018
    vinsanity0, Nov 10, 2018
    #1
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  3. Nov 10, 2018 #2
    gokiddogo

    gokiddogo Road Train Member

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    Where does it leak from when shut off. Can you determine that? Is it making a puddle of coolant wherever you park it?
     
    gokiddogo, Nov 10, 2018
    gokiddogo, Nov 10, 2018
    #2
  4. Nov 10, 2018 #3
    vinsanity0

    vinsanity0 Light Load Member

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    82
    Jun 26, 2016
    0
    I can't see where it's coming from. It doesn't just start pouring out when I shut it down. It usually takes awhile. Then it covers the catwalk as I'm driving. It usually stops around the sensor but doesn't seem to be coming from there. Both units did this.
     
    vinsanity0, Nov 10, 2018
    vinsanity0, Nov 10, 2018
    #3
  5. Nov 11, 2018 #4
    iceman32

    iceman32 Medium Load Member

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    Sep 26, 2014
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    It’s probably one of the hoses. Depending on what Unit model you have, the hose locations can vary. Some are behind the firewall or inside the reefer. A service provider will need to literally take everything apart and it’s not a 1 day job.
     
    iceman32, Nov 11, 2018
    iceman32, Nov 11, 2018
    #4
  6. Nov 12, 2018 #6
    reeferwrencher

    reeferwrencher Medium Load Member

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    Aug 4, 2018
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    What model of tk reefer is it?
     
    reeferwrencher, Nov 12, 2018
    reeferwrencher, Nov 12, 2018
    #6
  7. Nov 12, 2018 #6
    Farmerbob1

    Farmerbob1 Road Train Member

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    Jan 17, 2017
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    My guess is a temperature related leak. When the unit is hot and everything is expanded from heat, there is no leak. When the unit cools, something is contracting enough to create a leak.

    It might be a crack, but I suspect it is an old seal. I am completely unfamiliar with reefer unit construction, but the first thing I would check are o-ring seals if there are any.
     
    Farmerbob1, Nov 12, 2018
    Farmerbob1, Nov 12, 2018
    #6
    Snailexpress and SteerTire Thank this.
  8. Nov 14, 2018 #7
    buzzarddriver

    buzzarddriver Road Train Member

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    Feb 1, 2011
    Dallas, TX
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    Gets some UV Coolant leak detector fluid and then look with a UV light to find the leak. As FarmerBob said. It is leaking from a crack that opens up when the unit cools off.
     
    buzzarddriver, Nov 14, 2018
    buzzarddriver, Nov 14, 2018
    #7
    Farmerbob1 Thanks this.
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