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Leaking differential oil from the inter axle switch in the cab can one help

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Michaelk910, Feb 14, 2021.

  1. Feb 14, 2021 #1
    Michaelk910

    Michaelk910 Bobtail Member

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    I noticed gear oil leaking from behind the dash so I took the dash apart and noticed oil leaking from the actual lock and unlock differential axle switch can one tell me what could cause the switch to leak
     
    Michaelk910, Feb 14, 2021
    Michaelk910, Feb 14, 2021
    #1
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  3. Feb 14, 2021 #2
    AModelCat

    AModelCat Road Train Member

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    Drain your air tanks and see if there's oil in them. Could be engine oil in the air system from the compressor.
     
    AModelCat, Feb 14, 2021
    AModelCat, Feb 14, 2021
    #2
    Dino soar, little cat 500, Diesel Dave and 3 others Thank this.
  4. Feb 14, 2021 #3
    mtoo

    mtoo Road Train Member

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    What @AModelCat says
     
    mtoo, Feb 14, 2021
    mtoo, Feb 14, 2021
    #3
    650cat425 Thanks this.
  5. Feb 14, 2021 #4
    Goodysnap

    Goodysnap Road Train Member

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    The orings are leaking in the differetial lock cylinder. Apply the lock and see if air is leaking into the differential indicating that fluid might go the other way.

    Also check the axle vent for plugged. If air cant escape as it warms, the pressure takes the path of least resistance and may be forcing fluid up to the switch.

    Gear oil has that special wang to it...
     
    Goodysnap, Feb 14, 2021
    Goodysnap, Feb 14, 2021
    #4
    Diesel Dave, Roger McG, IH Truck Guy and 5 others Thank this.
  7. Feb 15, 2021 #5
    jwsweet1979

    jwsweet1979 Bobtail Member

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    Diff lock solenoid is leaking. Do just as Goodysnap suggested. I've had this issue myself, just like you are describing.
     
    jwsweet1979, Feb 15, 2021
    jwsweet1979, Feb 15, 2021
    #5
  8. Feb 15, 2021 #6
    Michaelk910

    Michaelk910 Bobtail Member

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    Thanks you guys
     
    Michaelk910, Feb 15, 2021
    Michaelk910, Feb 15, 2021
    #6
  9. Feb 21, 2021 #7
    Michaelk910

    Michaelk910 Bobtail Member

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    Where would the solenoid be located
     
    Michaelk910, Feb 21, 2021
    Michaelk910, Feb 21, 2021
    #7
  10. Feb 21, 2021 #8
    Michaelk910

    Michaelk910 Bobtail Member

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    Feb 14, 2021
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    What
    what did u do too fix it
     
    Michaelk910, Feb 21, 2021
    Michaelk910, Feb 21, 2021
    #8
  11. Feb 21, 2021 #9
    Cattleman84

    Cattleman84 Road Train Member

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    In the differential.
     
    Cattleman84, Feb 21, 2021
    Cattleman84, Feb 21, 2021
    #9
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