The PGE governor is basically a standard PG hydraulic governor to regulate engine speed with a number of special adaptations for locomotive and train operation. It includes an electro-hydraulic speed setting mechanism for remote control of engine speed, a mechanical-hydeaulic load control device for automatic regulation of engine load to maintain a specific power output at each speed setting, and a 12 ft-lb (16 J) single acting spring return hydraulic power servo with tailrod. The power servo may have either a reciprocating (linear) or rotary output.

The governors may be arranged for use with a remote vane servomotor to adjust the generator exciter rheostat or they may include both servomotor and rheostat as integral parts of the governor.