Vol. 7, Issue 11, Part A (2025)

EP 90 transmission oil plays an important role in the operation of the machine, which is why it is important to pay attention to the signals that will notify you that it needs to be changed.
Hydraulic fluid, lubricant and coolant - these are the three important roles that transmission oil successfully fulfills. In this article, we have determined four rheological models that describe the behavior of EP90 oil. The presence of anti-wear and extreme pressure additives does not significantly affect the rheological behavior, but contributes to maintaining lubricating performance under conditions of high load, high temperatures and increased pressure.