3304 & 3306 GENERATOR INDEX SET ENGINE ATTACHMENTS SYSTEMS OPERATION Automatic Start/Stop System ............................... 14-20 Automatic Transfer Switch ............................. 14 Control Panel ................................................. 15 Electric Set..................................................... 15 Wiring Diagrams ............................................ 15-20 Electrical System Attachments............................. 10-13 Electrical Gauges and Sending Units ............ 11 Electric Tachometer Wiring  ........................... 12 Instrument Panel............................................ 10 Wiring Diagram .............................................. 13 Fuel System.......................................................... 4, 5 Air-Fuel Ratio Control .................................... 4, 5 Shutoff and Alarm Systems  ................................. 21-42 Shutoff and Alarm System Components.............. 43-45 Circuit Breaker............................................... 44 Electronic Speed Switch................................ 44 Mechanical Overspeed Switch ...................... 44 Oil Pressure Switch ....................................... 43 Pressure Switch............................................. 43 Shutoff Solenoid ............................................ 43 Woodward PSG Governor ................................... 6-9 Introduction.................................................... 7 Pilot Valve Operation..................................... 7 Speed Adjustment ......................................... 8 Speed Droop ................................................. 9 TESTING AND ADJUSTING Electric Shutoff System ........................................ 70-76 Fuel System.......................................................... 55-58 Governor Adjustment for Air Fuel Ratio Control 55 Instruments and Gauges ...................................... 77, 78 Electric Gauges.............................................. 77 Mechanical Gauges for Oil Pressure ............. 78 Mechanical Gauges for Temperature ............ 78 Oil Pressure Sending Units............................ 77 Water Temperature Sending Unit .................. 77 Shutoff and Alarm System Components .............. 65-69 Contactor Switch for Oil Pressure.................. 65 Contactor Switch for Overspeed .................... 67 Contactor Switch for Water Temperature ...... 66 Magnetic Pickup................................................... 68 Oil Pressure and Water Temperature Shutoff (Mechanical) .................................................. 68 Pressure Switch with Time Delay......................... 67 Shutoff Solenoids ................................................. 67 Troubleshooting ................................................... 46-54 Woodward PSG Governor ................................... 59-64 Adjusting High Idle Stop ................................ 61 Check Speed Droop ...................................... 62 Fuel Setting Procedure.................................. 60 Linkage Adjustment ....................................... 59 Needle Valve Adjustment .............................. 59 Pilot Valve Adjustment................................... 63 Speed Droop Adjustment .............................. 62 SPECIFICATIONS NOTE: For Specifications with illustrations, make reference to SPECIFICATIONS for 3304B & 3306B GENERATOR SET ENGINE ATTACHMENTS, Form No.  SENR2798.  If the Specifications in Form SENR2798 are not the same as in the Systems Operation and the Testing and Adjusting, look at the printing date on the back cover of each book.  Use the Specifications given in the book with the latest date. 3