Substitute for Mobilfluid 423?
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  1. #1
    Mekanizm is offline Cast Iron
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    Default Substitute for Mobilfluid 423?

    Assuming it's unavailable because I can't seem to find any. It is called out for the headstock lubrication in a Sheldon 15R lathe. Anybody know what I can substitute for it?

  2. #2
    johnoder's Avatar
    johnoder is offline Diamond
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    Mobilfluid 423 is listed under transmission fluids. Is has no ISO # applied in the Brief Product Descriptions book I have, but SUS @ 100 F° is given as 283 - not too far off from the 335 of DTE Heavy Medium (very commonly used in headstocks)

    If your Sheldon has no hydraulic gadgets in the HS, I suggest DTE Heavy Medium by Exxon Mobil

    John Oder

  3. #3
    ENGINENUT2 is offline Aluminum
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    Default Mobilfluid 423

    I have a fairly recent comparison chart showing it as an automatic transmission fluid other brands being: Conoco Powertran III, Shell Donax TD, Exxon Torque fluid 56, Co-op Tractor hydraulic Fluid.Other brands are listed, if they will help let me know.

  4. #4
    Mekanizm is offline Cast Iron
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    Yes, buying something by the quart locally would be nice! I'll look around.

  5. #5
    JRIowa's Avatar
    JRIowa is offline Diamond
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    The replacement for 423 is Mobilfluid 424. It is not automotive ATF nor is it hydraulic oil. When machine tool builders use a lube like this, it's usually because they have a wet clutch or a power shift (or both).

    As old as that lube is, it's probably time for a drain and replace. You might be able to buy gallons of the comparible John Deere lube at a dealership. That would be JDN-JD20. Other places to try are TSC (tractor supply). They might have 1 or 2 gallon jugs. Look for the comparability to JDM-JD20, Catipiler TO-2, or Allison C-4.
    JR


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