Results 1 to 5 of 5
Thread: Substitute for Mobilfluid 423?
08-26-2008, 04:27 PM #1
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?
08-26-2008, 04:51 PM #2
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
08-26-2008, 09:57 PM #3
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.
08-26-2008, 11:07 PM #4
Yes, buying something by the quart locally would be nice! I'll look around.
08-27-2008, 09:23 AM #5
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.