KW t680 Paccar engin.Oil leaking from engine to steer pump,gear box&resorvoir

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Sly#123, Apr 24, 2026 at 6:21 PM.

  1. Apr 24, 2026 at 6:21 PM #1
    Sly#123

    Sly#123 Bobtail Member

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    Just had power steering pump go out on my 2x,so teck said I need a new steering gear box.
    Brought that new lines filters&all..
    Somehow oil is leaving my engine&going into the power steering pump reservoir @&leaking out the top severely!!!

    CAN ANYONE PLEASE ADVISE??? image.jpg image.jpg image.jpg
     

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    Sly#123, Apr 24, 2026 at 6:21 PM
    Sly#123, Apr 24, 2026 at 6:21 PM
    #1
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  3. Apr 24, 2026 at 7:35 PM #2
    Goodysnap

    Goodysnap Road Train Member

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    The only connection to engine oil is from the steering pump to air compressor.

    Is the installed a Paccar part? Did you replace the tandem with fuel pump or just steering? I would be looking at the drive and connection to the air compressor for damage that is progressing to the pump.
     
    Goodysnap, Apr 24, 2026 at 7:35 PM
    Goodysnap, Apr 24, 2026 at 7:35 PM
    #2
  4. Apr 24, 2026 at 10:07 PM #3
    Star Rider

    Star Rider Road Train Member

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    Many years ago the same thing happened on the truck in my profile pic.
    It's the power steering pump causing it. There is a 2-way seal in it and if one part fails it will suck in engine oil and do exactly what you describe.
     
    Star Rider, Apr 24, 2026 at 10:07 PM
    Star Rider, Apr 24, 2026 at 10:07 PM
    #3
    Rugerfan Thanks this.
  5. Apr 27, 2026 at 12:13 AM #4
    khurmiDiesel

    khurmiDiesel Bobtail Member

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    Apr 5, 2026
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    Power steering pump faulty driven by air compressor
     
    khurmiDiesel, Apr 27, 2026 at 12:13 AM
    khurmiDiesel, Apr 27, 2026 at 12:13 AM
    #4
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