G3306B Generator Sets Caterpillar

The monitoring of bearing temperature may prevent premature bearing failure. A generator set should never operate above the recommended set points. Keep records in order to monitor the changes in the temperature of the bearing.

Note: Measure the bearing temperature after the generator reaches normal operating temperature.

Resistive Temperature Detectors (RTDs)

Cat Generators may be equipped with resistance temperature detectors for generator bearings. These detectors are 100 ohm resistance temperature detectors. A resistance temperature detector may be monitored by the optional monitor for the EMCP 4.4 resistance temperature detector. A resistance temperature detector may be monitored by equipment that is provided by the customer. Consult with your Cat dealer about other methods of measuring the bearing temperature.

The EMCP 4.4 may be configured to "ALARM" or the EMCP 4.4 may be configured to "SHUTDOWN". An alarm is activated if the temperature of the bearing reaches 85 °C (185 °F). A shutdown occurs if the temperature of the bearing reaches 95 °C (203 °F).

Infrared Thermometers

Bearing temperatures can also be recorded with the use of an infrared thermometer. Refer to Special Publication, NENG2500, "Cat Dealer Service Tools Catalog" for various infrared thermometers. Follow the instructions that come with your infrared thermometer.