CONE-BEARING 4B7255 - Caterpillar

This section contains some general information about the function of typical engine protective devices.Alarms and shutoffs are electronically controlled. The operation of all alarms and shutoffs utilize components which are actuated by a sensing unit. The alarms and shutoffs are set at critical operating temperatures, pressures, or speeds in order to protect the engine from damage.The alarms function in order to warn the operator when an abnormal operating condition occurs. The shutoffs function in order to shut down the engine when a more critical abnormal operating condition occurs. The shutoffs help to prevent damage to the equipment.If an engine protective device shuts off the engine, always determine the cause of the shutoff. Make the necessary repairs before attempting to start the engine.Become familiar with the following information:
Types of the alarm and shutoff controls
Locations of the alarm and shutoff controls
Conditions which cause each control to function
Resetting procedure that is required before starting the engineThe alarms and shutoffs are different for different engines and applications. For more information, see Service Manual, SENR3078, "Hydramechanical Protective System" or see Service Manual, SENR2984, "Electric Protective System".