307B Excavator Caterpillar


Monitoring System

Usage:

307B AFB


NOTICE

When the monitor provides a warning, immediately check the monitor and perform the required action or maintenance as indicated by the monitor.

The monitor indicator does not guarantee that the machine is in a good condition. Do not use the monitor panel as the only method of inspection. Maintenance and inspection of the machine must be performed on a regular basis. See the Maintenance Section of this Operation and Maintenance Manual.




Illustration 1g00609710

The monitor panel is designed to alert the operator of an immediate problem or of an impending problem. The problem could be in more than one of the machine systems that are listed.

Functional Test

To ensure proper operation, check the system daily. The functional test can be part of the starting procedure for the engine. For details on starting procedures for the engine, see Operation and Maintenance Manual, "Engine Starting".

Warning Categories

The electric monitor panel provides three warning categories. The first warning category requires only operator awareness. The second warning category requires an operator response. The third warning category requires immediate shutdown of the machine systems.

Warning Category 1

In this category, only the alert indicator comes on. This category alerts the operator that the machine system needs attention. Failure of these systems will not endanger the operator. Failure of these systems will not cause serious damage to the machine components.



Illustration 2g00609763

Alternator (1) - This alert indicator indicates that the electrical charging system is malfunctioning. The machine can be operated while the alternator indicator light is on. However, if the electrical accessories are used, the batteries will discharge rapidly. Perform any necessary repairs.

Warning Category 2

In this category, the alert indicator comes on. This category requires a change in machine operation in order to reduce excessive temperature in one of the machine systems or more.



Illustration 3g00609767

Engine Coolant Temperature (2) - This alert indicator indicates excessive coolant temperature. If this alert indicator comes on, reduce the operating speed of the machine. Keep the engine at low idle until the engine is cooled down. If the indicator stays on after running the engine at low idle, stop the engine. Check the coolant level. Check the fan drive belts for the water pump and fan blade. Make any necessary repairs.

Warning Category 3

In this category, the alert indicator comes on and the action alarm sounds. This category requires immediate shutdown of the machine in order to prevent injury to the operator and/or severe damage to the machine.



Illustration 4g00609768

Engine Oil Pressure (3) - This alert indicator indicates low engine oil pressure. If this alert indicator comes on, stop the machine immediately. Stop the engine and investigate the cause of the problem. Do not operate the machine until the cause of the problem has been corrected.

Miscellaneous Indicators



Illustration 5g00609770

Low Idle Indicator (4) - If the low idle switch is pressed, the indicator comes on. This indicates that the control system for the low idle is activated. Push the switch again in order to stop the system.

Heat Indicator (5) - Turn the engine start switch to the HEAT position and hold the engine start switch in this position. The indicator comes on and the glow plug starts to preheat.

Note: For further information, see Operation and Maintenance Manual, "Starting Below -18° C (0° F)".

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