SUPPORT AS- 2977468 - Caterpillar

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Dash panel (1) Brake oil temperature gauge (2) Action lamp
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Dash panel (2) Action lamp (3) Alert indicator (4) Display windowThe Caterpillar Monitoring System receives a signal from the brake oil temperature sensor. The brake oil temperature sensor is located in the brake cooling return manifold at the rear of the transmission. Brake oil temperature gauge (1) will display this sensor input.
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(A) Temperature reading of 110°C (230°F) (B) Temperature reading of 124°C (255°F)Check brake oil temperature gauge (1) regularly. During this test sequence, do not allow the temperature of the brake oil to get too hot as damage to the brakes may occur.When the oil temperature is too hot for the current conditions, alert indicator (3) and action lamp (2) come on. An event will be displayed in display window (4). If the brake oil is too hot, reduce the load on the machine or slow the machine speed. Also, downshift the transmission to a lower speed. For additional cooling, park the truck in a convenient location. Put the transmission in NEUTRAL, and run the engine at approximately 1500 rpm.Problems
Problem: The oil temperature gauge indicates high temperature, but there are no alarm indicators.
The oil temperature is too hot according to brake oil temperature gauge (1). Action lamp (2) and alert indicator (3) are off.Probable CauseLook at the events in display window (4). Determine the location of the error in the electrical system. Refer to the Electrical Schematic. Consult your Caterpillar dealer for additional information.Problem: The oil temperature is normal, but the action lamp is on.
The oil temperature is within the normal range, but action lamp (2) is on.Note: Action lamp (2) is activated when the oil temperature reaches 124°C (255°F). The action lamp remains activated until the oil temperature decreases to approximately 110°C (230°F). Therefore, brake oil temperature gauge (1) may indicate a normal oil temperature while the action lamp is activated.Probable CauseLook at the events in display window (4). Determine the location of the error in the electrical system. Refer to the Electrical Schematic. Consult your Caterpillar dealer for additional information.Problem: The oil temperature is hot.
The oil temperature is too hot according to brake oil temperature gauge (1). Action lamp (2) and alert indicator (3) are on. Display window (4) displays an event about brake oil temperature.Probable CauseThe truck is being operated improperly.ReferenceRefer to Operation and Maintenance Manual for the correct operating techniques of the brake and retarder system.Operate the machine again. With the engine above 1700 rpm, oil flows through brake oil coolers in order to keep the oil at normal operating temperature.Problem: The oil temperature is hot on a properly operated machine.
The oil temperature is too hot according to brake oil temperature gauge (1). Action lamp (2) and alert indicator (3) are still on after the truck is operated correctly. Display window (4) displays an event about the brake oil temperature.Probable Cause
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Gear pump (hoist, steering, brake, and pilot) (5) Hoist pump section
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Hoist control valve (6) Brake oil cooler relief valve
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