2018 MX-13 T880 oil pressure and temperature issue

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Tim4788, Feb 25, 2019.

  1. Tim4788

    Tim4788 Bobtail Member

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    Feb 25, 2019
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    My Brother purchased a 2018-19 T880 with a 40 ton crane mounted on it. It weighs 62K total. It has the Digital dashboard with oil pressure , temp and other features. It was purchased new and driven a few hundred miles to have the crane mounted. Then driven from Texas to Florida.

    Paccar Mx-13 455/1650 10speed manual

    The concern is the oil temp will go to 230* just driving down the highway on a 60* or 85* night. When the oil is that hot it also only makes 45psi at 1500rpm. That oil pressure seems to be low . I realize that as oil heats up pressure will go down to a certain extent.

    Coolant temp is steady at 190 * . It doesn't cycle the cooling fan on the highway so to me its not overheating or working too hard. It was driven on flat roads. It also gets to 230* oil temp in city driving.

    I could understand it working hard if it had a large bed that didn't go thru the air well . Like a 70yd Grapple truck . But its not.

    Paccar says that oil temp is fine since its measured pre cooler. I don't know why they would measure it there instead of the oil pan . IIRC everyone in the automotive industry measures it from the pan.

    Has anyone else with the digital dash measured their oil temp/pressure.

    What are your pressures?

    Any ideas ? Thank you
     

    Attached Files:

    Last edited: Feb 25, 2019
    Mothatrucka Jones Thanks this.
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  3. Roberts450

    Roberts450 Road Train Member

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    Cummins/Paccar haven't measured oil temp from the pan in almost 10 years and they run a normal operating temp of 225-230 degrees. Not sure about oil pressure for the paccar but cummins runs a low pressure system.
     
  4. Goodysnap

    Goodysnap Road Train Member

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    2017 and newer MX have a oil pump change with lower pressure pump to previous years where it would peg the gauge at 100 on cold days. Pressure on the new pump is limited to 35-40 psi and was changed for fuel efficiency to decrease load on the engine.
     
  5. BoxCarKidd

    BoxCarKidd Road Train Member

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    From running some stationary equipment that was overheating I found the hottest spot on an engine can be the oil cooler. 230 is not a concern to me.
     
    spsauerland Thanks this.
  6. GypsyWanderlust

    GypsyWanderlust Medium Load Member

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    Both of the newer trucks that I’ve driven run at about 40 psi. Cummins ISX and Pacar.
     
  7. Tim4788

    Tim4788 Bobtail Member

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    Feb 25, 2019
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    Thank you very much guys.
     
  8. jland1962

    jland1962 Bobtail Member

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    Aug 15, 2018
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    My 2015 ran 210 oil temp,60-65 oil pressure for 500,000 miles.
    October 2 it suddenly went up to 250+
    Oil pressure down to 40.
    After 4 trips to the dealer over 10K spent including a new oil cooler nothing changed.
    They have the truck now replacing the wiring harness.
    That will be another 4K and who knows if it will fix it.
     
  9. balliworld

    balliworld Bobtail Member

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    Apr 25, 2019
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    Hi,
    How is truck running after replacing harness ?
    I am going thru same issue.
     
  10. jland1962

    jland1962 Bobtail Member

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    No issues for several weeks.
     
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