P-552 ESS And Relay Test
Usage:
If an overspeed condition is reached (pin 7 on ESS is energized) the relay (SR1) will open (terminals 87A and 30) causing the shutoff solenoid to deenergize and shutting the fuel to the engine.
Schematic
NOTE: For a more detailed schematic, refer to 3408/3412 High Performance Marine Engine Schematic, Form No. SENR5518.
Caterpillar Information System:
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