Eaton Hydraulic Series 76 Control Orifice

A control orifice is known as a control valve or an internal pressure override. It helps decide the speed that the displacement changes. The orifice can change as the vehicle operating applications change.  Look on the orifice you will find a stamp on there that tells the size.

The chart below shows different sizes for different models.

If you need more help with this, call us at 800-361-0068 or email us at

sales@hydrostatic-transmission.com