What hydraulic fluid to use in barber chair?

For barber chairs, it's essential to use a hydraulic fluid that is compatible with the chair's hydraulic system. Typically, a high-quality non-toxic hydraulic oil is recommended, often labeled as ISO 32 or ISO 46. Always check the manufacturer's specifications or manual for the exact type of fluid to ensure optimal performance and longevity of the chair's hydraulics. Avoid using motor oils or other non-specific fluids, as they can damage the system.