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Engine brake and oil pressure

Discussion in 'Volvo Forum' started by Morkable, May 3, 2016.

  1. May 3, 2016 #1
    Morkable

    Morkable Bobtail Member

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    The last couple trips I have found that if I am doing a long hake down a hill and my Rpms are a little high (between 1800 and 2000) my oil pressure will drop enough to cause engine to go into limp mode. If I keep Rpms under 1700. No issues. Any ideas? Anything I need to worry about?
     
    Morkable, May 3, 2016
    Morkable, May 3, 2016
    #1
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  3. May 3, 2016 #2
    Brandt

    Brandt Road Train Member

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    Those are pretty high rpms not sure why oil pressure would drop unless your so low on oil, the oil is being used for engine brake then sets a low oil warning off
     
    Brandt, May 3, 2016
    Brandt, May 3, 2016
    #2
  4. May 3, 2016 #3
    Brandt

    Brandt Road Train Member

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    You should use less rpms going down hill because in the winter if trailer ever starts to slide you can't pull the trailer back behind truck without shifting gears. The time it take to get next gear maybe to late to stop a jackknife. You want low rpm going down hill.
     
    Brandt, May 3, 2016
    Brandt, May 3, 2016
    #3
  5. May 4, 2016 #4
    KB3MMX

    KB3MMX Road Train Member

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    most likely the O-rings for the oil supply in your eng brake.

    Is your Jake sometimes inconsistent?
     
    KB3MMX, May 4, 2016
    KB3MMX, May 4, 2016
    #4
  7. May 4, 2016 #5
    Superhauler

    Superhauler TEACHER OF MEN

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    First of all, what kind of engine?
     
    Superhauler, May 4, 2016
    Superhauler, May 4, 2016
    #5
  8. May 7, 2016 #6
    Morkable

    Morkable Bobtail Member

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    Dec 29, 2015
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    Sorry. It's a d16. 625.

    Kb3mmx. Can you explain inconsistent? As in engine braking power?
     
    Morkable, May 7, 2016
    Morkable, May 7, 2016
    #6
  9. May 8, 2016 #7
    KB3MMX

    KB3MMX Road Train Member

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    Yes exactly. Failing orings on D16 can make the brake not work or intermittent.....or with reduced effectiveness. I've had this happen on mine. Bet it's your Orings are bad...
     
    KB3MMX, May 8, 2016
    KB3MMX, May 8, 2016
    #7
  10. May 8, 2016 #8
    Morkable

    Morkable Bobtail Member

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    That sounds like a winner. Are these orings hard to change?
     
    Morkable, May 8, 2016
    Morkable, May 8, 2016
    #8
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