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Buying a cascadia with dd15. What to check pre-purchase?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by royal55flush, Dec 4, 2019.

  1. Dec 4, 2019 #1
    royal55flush

    royal55flush Bobtail Member

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    Dec 4, 2019
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    Im a newer driver at a mega carrier and I'm switching to OO. They got me set up to buy (not lease) a 2016 DD15 Cascadia with 12 speed auto. The truck has 475k miles and a powertrain warranty for a year from purchase. The configuration is correct for the loads I haul and I'm currently in an identical company truck and like it. The price is reasonable to market so I'm pulling the trigger.

    What should I check on the truck before I sign?
     
    royal55flush, Dec 4, 2019
    royal55flush, Dec 4, 2019
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  3. Dec 4, 2019 #2
    uncleal13

    uncleal13 Road Train Member

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    Transmission and differential oils are now due to be changed.
    Find out if the DPF filter has been changed, if not that will be due soon.
    Ask if O-rings on tubes from oil pickup to oil pump have been changed. They'll be due, but not expensive to change.
    SCR in One-Box will go around 600-700,000 miles, $10,000 plus replacement.
    Engine should be good to a million or more.
     
    uncleal13, Dec 4, 2019
    uncleal13, Dec 4, 2019
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  4. Dec 4, 2019 #3
    royal55flush

    royal55flush Bobtail Member

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    Appreciate it
     
    royal55flush, Dec 4, 2019
    royal55flush, Dec 4, 2019
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  5. Dec 4, 2019 #4
    Working2party

    Working2party Medium Load Member

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    I usually check the engine oil pickup O-rings first start in the morning. Watch the Oil pressure gauge. If they are due you’ll find the pressure erratic jumping from 50-60 psi in the first few minutes. (That’s the air that seeped in when it was shut down being purged)

    When they are worse you’ll see it jump a around a couple times in the 20 psi area (before shooting on up).

    When they past due, the oil pressure light will flash when you make corners to fast!!

    So definitely check for the suction o-rings.
     
    Working2party, Dec 4, 2019
    Working2party, Dec 4, 2019
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  7. Dec 7, 2019 #5
    boneebone

    boneebone Road Train Member

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    Stay a company driver, these Post-Emission trucks will nickel and dime you till you’re broke.
     
    boneebone, Dec 7, 2019
    boneebone, Dec 7, 2019
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