904H Compact Wheel Loader Caterpillar


Alert Indicators

Usage:

904H H4T



Illustration 1g01516980

(1) Directional Turn Signals

(2) Brake Indicator Light

(3) Engine Oil Pressure

(4) Roading Lights

(5) High Beams

(6) Hydraulic Oil Filter Bypass

(7) Hydraulic Oil Temperature

(8) Electrical System

(9) Parking Brake

(10) NEUTRAL

(11) FORWARD

(12) REVERSE

(13) Work Tool Coupler

(14) Differential Lock


Directional Turn Signals (1) - The indicators will flash when the turn signal lever is operated.


Brake Indicator Light (2) - This indicator light indicates that the parking brake is engaged.

Note: If the parking brake is engaged with the direction control switch in the FORWARD position or in the REVERSE position, the brake indicator light comes on and the action alarm will sound.


Engine Oil Pressure (3) - The alert indicator will light when the engine oil pressure is low. If this alert indicator comes on, an action alarm will sound. Stop the machine immediately. Stop the engine and investigate the cause.

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


Roading Lights (4) - The alert indicator will light when the control for the roading lights is activated.


High Beams (5) - The alert indicator will light when the control for the high beams is activated.


Hydraulic Oil Filter Bypass (6) - The alert indicator will light when the hydraulic oil bypasses the hydraulic oil filters. If this alert indicator comes on, move the machine to a convenient location. Investigate the cause.

Note: In extreme cold situations, the indicator will come on until the hydraulic oil warms up.


Hydraulic Oil Temperature (7) - This indicator indicates that the hydraulic oil is overheating. Reduce the operating speed and run the engine at low idle until the hydraulic oil temperature decreases to the normal operating temperature. Restart machine operation. If the indicator remains on, stop the engine. Check the hydraulic oil level. Check the oil cooler for any restrictions. Make any necessary repairs.


Electrical System (8) - 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 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 battery.

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 LOW fan speed instead of the HIGH fan speed for the blower fan motor.

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, faulty battery, 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, faulty battery, etc).


Parking Brake (9) - The alert indicator will light when the parking brake is engaged. The alert indicator should come on during start-up. The alert indicator should go out when the parking brake is released.


NEUTRAL (10) - The indicator will light when the direction control switch is in the NEUTRAL position.


FORWARD (11) - The indicator will light when the direction control switch is in the FORWARD position.


REVERSE (12) - The indicator will light when the direction control switch is in the REVERSE position.


Work Tool Coupler (13) - The indicator will light when the work tool coupler is disengaged.


Differential Lock (14) - The indicator will light when the differential lock is activated.

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