How to Start and Stop Waukesha Gas Generator?

Waukesha Gas Generator MTG 846, KVA 1125, KW 900, PF 0.8, Voltage 415, AMPS 1565, Hz 50, RPM 1000 and Phase 3
In my last factory, there were two Waukesha GAS generators. It was my responsibility to keep two generators active for 24/7. Because it is the only power source for our factory.  Our two Waukesha GAS generators alternator model number was ...