BASE ASSEM. 9S1770 - Caterpillar

To prevent personal injury due to accidental starting of the engine, disconnect the batteries before doing maintenance or repair work.
To clear the fault and ready the system for starting, do the following: 1. Turn engine control switch (ECS) to STOP position.2. Determine the cause of the high water temperature problem and repair. Allow engine temperature to cool so WTS will reset.3. Make sure red (ESPB) has been reset (button out) on both the engine junction box and generator control panel.4. Turn (ECS) to OFF/RESET position to clear the fault relay (WTR) and fault light (WTL).5. The system is ready to start if engine control switch (ECS) is turned to MAN or AUTO.Engine Shutdown Caused By Engine Overspeed
For normal system operation, make reference to section ENGINE START-UP.When engine speed increases above the overspeed setting (118% of rated speed) of the electronic speed switch (ESS), the overspeed switch contact ESS (OS) will close across terminals ESS (7 and 8) (line 29) and open across terminals ESS (8 and 9) (line 29). When ESS (OS) closes across terminals ESS (7 and 8), the following occurs: 1. ESS (OS) latches itself in the closed position.2. Energizes the slave relay (SR2) (line 33) which closes its normally open contact to energize the air shut-off solenoid (ASOS) (line 47). The (ASOS) assists the de-energized fuel