928G Wheel Loader Alert Indicators Caterpillar


Alert Indicators
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Illustration 1g00487828


Lamp Test - Press the top of switch (1) in order to test the lamps of the alert indicators. All of the following alert indicators that are located on the left side of the steering console should come on when the engine is running. The action alarm should sound also.

If all of the alert indicators that are located on the left side of the steering console do not come on, investigate the cause. The indicator light for the primary steering should come on when the switch for the lamp test is pressed. The indicator for the primary steering is located on the right side of the steering console.




Illustration 2g00101720


Transmission Oil Temperature (1) - The alert indicator will light when there is excessive transmission oil temperature. If this alert indicator comes on, move the machine to a convenient location. Investigate the cause.


Coolant Temperature (2) - The alert indicator will light when there is excessive coolant temperature. If this alert indicator comes on, move the machine to a convenient location. Investigate the cause.


Brake Oil Pressure (3) - The alert indicator will light when the brake oil pressure is low. If this alert indicator comes on, stop the machine immediately. Engage the parking brake and stop the engine. Investigate the cause.


Engine Oil Pressure (4) - The alert indicator will light when the engine oil pressure is low. If this alert indicator comes on, stop the machine immediately. Stop the engine and investigate the cause.

Do not run the engine until the cause has been corrected.




Illustration 3g00482103


Secondary Steering (5) (If Equipped) - The alert indicator will light when the electrical secondary steering motor is active.

Use secondary steering to steer the machine when the primary steering is not functioning. Use the secondary steering to steer the machine when the alert indicator for the secondary steering does not come on and you have performed the following procedure.

Turn the engine start switch key to the ON position. The alert indicator for the secondary steering will come on for three seconds. Then, the alert indicator will go off. If the alert indicator for the secondary steering does not come on, investigate the cause.

Do not operate the machine until the cause has been corrected.


Primary Steering (6) - The alert indicator will light and the action alarm will sound when the primary steering flow is not functioning. The alarm will only sound when the engine is running. When you turn the engine start switch key to the ON position, the alert indicator for the primary steering will come on after the machine is started. Then, the alert indicator will go off. If the alert indicator for the primary steering does not come on, investigate the cause.

Do not operate the machine until the cause has been corrected.


Electrical System (7) - The alert indicator will light when there is a malfunction in the electrical system. If this alert indicator comes on, the system voltage is too high for normal machine operation or too low for normal machine operation.

If electrical loads (air conditioning and/or lighting) are high and the engine speed is near idle, increase the engine speed to high idle. This will generate more output from the alternator. If the alert indicator for the electrical system turns off within one minute, the electrical system is probably operating in a normal manner. However, the electrical system may be overloaded during periods of low engine speeds.

Modify the operating cycle in order to prevent overloading the electrical system and discharging the batteries.

Low idle must be set correctly. Adjust for the high side of the Low Idle specification while the most often used electrical loads are turned on. In order to reduce the loads, use the Medium fan speed instead of the High fan speed.

If this procedure does not cause the alert indicator to turn off, move to a convenient location. Investigate the cause (loose alternator belt, broken alternator belt, defective batteries, etc).

If the engine speed is near operating speeds and if the electrical loads are light, the alert indicator may remain on. If the alert indicator remains on, move to a convenient location. Investigate the cause (loose alternator belt, broken alternator belt, defective batteries, etc).


Parking Brake (8) - The alert indicator will light when the parking brake is engaged. The alert indicator should come on during start-up when the parking brake is applied. The alert indicator should go out when the parking brake is released.

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