This guide covers general recommendations for the operation, loading and maintenance of Hydro-Generators and generator/motors having salient pole rotors and conventional cooling systems. Various areas of the withdrawn standard will be updated and revised to current practice. Revision Standard - Inactive-Reserved. General recommendations for the operation, loading, and maintenance of synchronous hydro-generators and generator/motors are covered. This guide does not apply to synchronous machines having cylindrical rotors. In this guide, the term hydro-generator is used to describe asynchronous machine coupled to a hydraulic turbine or pump-turbine. This guide is not intended to apply in any way to the prime mover.