Home Forums Hydraulics TOST for Hydraulic oil?

  • TOST for Hydraulic oil?

    Posted by Ankit Shukla on 20 December 2022 at 1:44 am

    Is TOST a necessary criteria to define a good hydraulic oil? We add about 17% water to test the sample but does that really happen in a closed hydraulic system?

    Ankit Shukla replied 1 year, 3 months ago 2 Members · 2 Replies
  • 2 Replies
  • Rafe Britton

    20 December 2022 at 2:05 pm

    That’s a really good question! I’d say that TOST is just a single data point in hydraulic oil selection. There’s pretty ample evidence to suggest that hydraulic oils (depending on the application of course) rarely fail through oxidation. It’s typically a contamination issue. I’ve attached a tech topic from ExxonMobil that covers the subject in a decent amount of detail. Do you have a specific hydraulic application that you are selecting for?

  • Ankit Shukla

    27 December 2022 at 4:51 pm

    Thank you for the clarification.