VALVE GP-RELIEF 1195186 - Caterpillar

The ECM will automatically perform the following functions if an engine overspeed occurs:
Warning
ShutdownDifferent setpoints are based on the engine application and the engine rating. The default settings that are programmed at the factory are listed in Table 1.
Table 1
Overspeed
Parameter Default Setting
Warning setpoint 1.18 times the rated rpm
Warning delay 0 seconds
Shutdown setpoint 1.18 times the rated rpm
Shutdown delay 0 seconds
Hysteresis 100 rpm
Security level Required password If the engine speed exceeds the setpoint rpm, a warning and a shutdown will occur. The fuel will be shut off and the air shutoff (if equipped) will be activated.The air shutoff must be reset before the engine can be restarted. Ensure that both of the air shutoffs are reset.Note: The default settings for the warning and for the shutdown are equal. Therefore, the warning and the shutdown occur simultaneously. These settings were selected in order to log both a warning and a shutdown: furthermore, an overspeed condition can occur rapidly.The setpoints can be programmed to a value between 1200 and 2400 rpm.