ROLLER GP-TRACK-SINGLE FLANGE 6Y0889 - Caterpillar

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Cab (1) Idle timer/fire suppression control unit (2) Fire suppression activated indicator (3) Idle timer activated indicator (4) System reset switch (5) Engine shutdown switch
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Right side view of engine (6) Engine ECM
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Cab (7) Main power relay
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Below dash panel (typical example) (8) Fire suppression pressure switchWith the key start switch in the ON position, 24 volt power is supplied to the main power relay. 24 volt power is supplied from the batteries via circuit breaker #11 to the idle timer/fire suppression control unit and then to the main power relay. With the main power relay energized, 24 volt power is supplied to the Engine ECM. This will enable the engine to run.If the fire suppression system pressure decreases to 860 170 kPa (125 25 psi), fire suppression pressure switch (8) will activate. This will provide a ground connection to activate the fire suppression system. With the fire suppression activated fire suppression activated indicator (2) will flash RED and the sonar alarm will activate. After a six second delay idle timer/fire suppression control unit (1) will de-energize main power relay (7) .When the main power relay is de-energized, 24 volt power is interrupted to Engine ECM (6) causing the engine to shutdown.Holding system reset switch (4) in the depressed position will maintain power to the main power relay. When the rest switch has been released the idle timer/fire suppression control unit will maintain power to the main power relay for a further six seconds.When the key start switch is turned to the OFF position, the idle timer/fire suppression control unit illuminates the fire suppression acivated indicator and continues to provide power to the main power relay. After three minutes of engine idle time, the unit interrupts power to the main power relay causing the relay to de-energize and the machine will shutdown.Depressing engine shutdown switch (5) at any time will interrupt power to the main power relay. This will shutdown the engine.
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Idle timer/fire suppression control circuit