Which hydaulic oil is used in fluid coupling?

In fluid coupling applications, hydraulic oils with specific viscosity ratings and properties are typically used, such as ISO VG 32, 46, or 68. These oils are chosen for their ability to provide effective power transmission, lubrication, and heat dissipation. Additionally, the oil should have good anti-wear properties and thermal stability to ensure reliable performance. Always refer to the manufacturer's specifications for the recommended oil type for a specific fluid coupling system.