Silver hub oil

Discussion in 'Trucks [ Eighteen Wheelers ]' started by cabwrecker, Oct 1, 2017.

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  1. Oct 1, 2017 #1
    cabwrecker

    cabwrecker The clutch wrecker

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    Just got a hub seal job done on my 630. The job is warrantied through the shop it was done at.

    Kept the old bearings (conmet) and replaced the spindle cone. Shop installed all seals, reinstalled all bearings and set preload step by step according to manufacturer specs and followed all manufacturer torque specs.

    Oil level is stable.

    The oil is turning/has turned silver. This is after roughly 5kish miles and it's slowly been turning this fresh Lucas hub oil metallic.

    My initial thoughts are the new cone working in, wanted to run it past you guys and get your thoughts?

    Like I mentioned, oil level is stable. Hub temp is normal. No actual metal shavings in the oil, just like pigment quality mettalic look to the oil.

    What do you guys think?
     
    cabwrecker, Oct 1, 2017
    cabwrecker, Oct 1, 2017
    #1
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  3. Oct 1, 2017 #2
    JimmyWells

    JimmyWells Road Train Member

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    Why not take it back to the shop that did the work?
     
    JimmyWells, Oct 1, 2017
    JimmyWells, Oct 1, 2017
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  4. Oct 1, 2017 #3
    Snailexpress

    Snailexpress Road Train Member

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    IMMEDIATELY. Wheel off or hub fire isn't pleasure.
     
    Snailexpress, Oct 1, 2017
    Snailexpress, Oct 1, 2017
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  5. Oct 1, 2017 #4
    Ristow

    Ristow Road Train Member

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    bearing don't "wear in" by shedding metal.
    i have seen some assembly lubes that look like micro metal specs when they mix in with oil. i think its the moly in them that does it.

    i'd get it figured out fast.
     
    Ristow, Oct 1, 2017
    Ristow, Oct 1, 2017
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  7. Oct 1, 2017 #5
    AModelCat

    AModelCat Road Train Member

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    Doesn't sound good. I'd get the shop that did it to check it out.
     
    AModelCat, Oct 1, 2017
    AModelCat, Oct 1, 2017
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  8. Oct 1, 2017 #6
    Goodysnap

    Goodysnap Road Train Member

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    Why was the LMS cone replaced? Were the bearing cups replaced to match? The cone spacers are matched to the hub for proper bearing preload upon assembly. Are we certain that the spacer cone was the same as the old? I would only recommend replacing the Hub and cone as a set. Most commonly seen would be that the cups were not fully seated in the hub upon replacement. Especially on aluminum hubs can be a bugger to get them seated. The other is that a typical bearing back-off adjustment was performed. LMS hubs are always torque tight- no back-off. Either way a teardown and inspection is in order.
     
    Goodysnap, Oct 1, 2017
    Goodysnap, Oct 1, 2017
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  9. Oct 1, 2017 #7
    Heavyd

    Heavyd Road Train Member

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    Wheel bearings do not wear in. Silver is a sign of metal in the oil and something breaking down. Take it in right away.
     
    Heavyd, Oct 1, 2017
    Heavyd, Oct 1, 2017
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  10. Oct 1, 2017 #8
    Rackpass 85

    Rackpass 85 Light Load Member

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    Get to shop asap!
     
    Rackpass 85, Oct 1, 2017
    Rackpass 85, Oct 1, 2017
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  11. Oct 2, 2017 #9
    Schnot

    Schnot Bobtail Member

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    Yep thats certainly metal in the oil as others have said. I just did mine in a 91 FLA and the drivers side was silvery like you explained yours to be. Once I got it apart and cleaned the bearings, the "coating" was coming off of the bearings. It was almost like the chrome plating was coming off.

    Now I know that bearings arent chrome plated, thats just the easiest way that I can explain what it was doing.
     
    Schnot, Oct 2, 2017
    Schnot, Oct 2, 2017
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  12. Oct 2, 2017 #10
    Heavyd

    Heavyd Road Train Member

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    Yep, like a bad heat treatment or something and that outer layer of hardened steel just sheds off.
     
    Heavyd, Oct 2, 2017
    Heavyd, Oct 2, 2017
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