966G II and 972G II Wheel Loaders Monitoring System Caterpillar


Monitoring System
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1.1. Quad Gauge Module
2.1. Speedometer/Tachometer Display
3.1. Indicator Displays
4.1. Main Display Module
5.1. Functional Test

Reference: Refer to Service Manual, SENR1394, "AVSpare Monitoring System" for detailed service information.



Illustration 1g00999611


Illustration 2g00999626

The AVSpare Monitoring System is an electronic monitoring system that continuously monitors machine systems. The monitoring system consists of the following displays: quad gauge module (1), speedometer/tachometer display (2), indicator display (3) and main display module (4).

Quad Gauge Module



Illustration 3g00995828

Coolant Temperature (5) - This gauge indicates excessive coolant temperature. If the gauge needle is in the red area, stop the machine and investigate the cause of the fault.

Transmission Oil Temperature (6) - The gauge indicates excessive transmission oil temperature. If the gauge needle is in the red area, reduce the load on the machine. If the gauge needle is in the red area and if the action light continues to flash after approximately five minutes, stop the machine and investigate the cause of the fault.

Hydraulic Oil Temperature (7) - The gauge indicates excessive hydraulic oil temperature. If the gauge needle is in the red area, reduce the load on the system. If the gauge needle remains in the red area, stop the machine and investigate the cause of the fault.

Fuel Level (8) - The gauge shows the amount of fuel in the fuel tank. If the gauge needle is in the red zone, the fuel tank is low on fuel. Refuel the machine as soon as possible.

Speedometer/Tachometer Display



Illustration 4g00995829

Tachometer (9) - The tachometer displays the engine rpm during operation.

Speedometer (10) - The speedometer displays the machine ground speed in mph or in km/h.

Gear/Direction Readout (11) - The gear readout displays the selected transmission gear and the selected direction.

Indicator Displays



Illustration 5g00999639

Left Turn Signal (12) - This light comes on when the left turn signal is activated.

Floodlights (13) - This light comes on when the floodlights are on.

Transmission Oil Filter (14) - This light comes on when the transmission oil filter is clogged.

Transmission Neutralizer (15) - This light comes on when the transmission neutralizer is deactivated.

Fuel Level (16) - This light comes on when the machine is low on fuel. Refuel the machine as soon as possible.

Ride Control (17) (if equipped) - This light comes on when the ride control is activated.

Automatic Ride Control (18) (if equipped) - This light comes on when the automatic ride control is activated.

Fuel Pressure (19) - This light comes on if the fuel pressure is extremely high or extremely low. If this alert indicator flashes during operation, stop the machine immediately and engage the parking brake. Stop the engine and investigate the cause of the fault.



Illustration 6g00999642

Action Light (20) - This light comes on when a fault has been detected by the monitoring system.

Hazard Lights (21) - This light comes on when the hazard lights are activated.

High Beam Lights (22) - This light comes on when the high beams are on.



Illustration 7g00999657

Engine Air Filter (23) - This light comes on when the engine air filter is clogged.

Automatic Pile Detection (24) - This light will come on when the autodig system is in the automatic pile detection mode. Automatic pile detection mode is the default mode for the autodig system. Refer to Operation and Maintenance Manual, "Aggregate Autodig" for more detailed information.

Right Turn Signal (25) - This light comes on when the right turn signal is activated.

Air Inlet Heater (26) - This light comes on when the air inlet heater is activated.

Operator Triggered Mode (27) - This light will come on when the autodig system is in the operator triggered mode. Refer to Operation and Maintenance Manual, "Aggregate Autodig" for more detailed information.

Service Indicator (28) - This indicator is not used with the Series II Wheel Loaders.

Record Mode (29) - This light will come on when the autodig system is in the record mode. Refer to Operation and Maintenance Manual, "Aggregate Autodig" for more detailed information.

Roading Lights (30) - This light comes on when the roading lights are activated.

Main Display Module



Illustration 8g00999696

Engine Oil Pressure (31) - The alert indicator indicates low oil pressure. If this alert indicator flashes, stop the machine immediately and engage the parking brake. Stop the engine and investigate the cause of the fault.

Parking Brake (32) - The parking brake is engaged. The alert indicator should flash during start-up. The alert indicator should go out when the parking brake is released.

Brake Oil Pressure (33) - The alert indicator indicates low oil pressure to the brakes. If this alert indicator flashes, stop the machine immediately and engage the parking brake. Stop the engine and investigate the cause of the fault .

Electrical System (34) - There is a malfunction in the electrical system. The system voltage is too high for normal machine operation or the system voltage is too low for normal machine operation.

If the electrical loads (air conditioning and/or lighting) are high and the engine speed is low, then increase the engine speed. 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 operating normally. Overload can occur during periods of low engine speeds.

Revise the operating cycle in order to avoid overloading the electrical system. Overloading the electrical system could result in discharging the batteries.

Reducing loads will also help. Use the medium fan speed instead of the high fan speed.

If this procedure does not cause the alert indicator to turn off, stop the machine and investigate the cause of the fault. The fault may be caused by an alternator belt that is loose or broken. Also, the batteries may be faulty.

If the indicator remains on near normal operating speeds and with light electrical loads, stop the machine and investigate the cause of the fault. The fault may be caused by an alternator belt that is loose or broken. Also, the batteries or the alternator may be faulty.

Front and Rear Axle Oil Temperature (35) (if equipped) - The alert indicator indicates that the axle oil temperature is high. If the alert indicator comes on, change operating techniques or park the machine in order to allow the axle to cool down. If the situation continues, consult your AVSpare dealer.

Hydraulic Oil Filter (36) - The alert indicator indicates a plugged hydraulic oil filter. If this alert indicator flashes during operation, stop the machine immediately and engage the parking brake. Stop the engine and investigate the cause of the fault.

Hydraulic Oil Level (37) - The alert indicator indicates low hydraulic oil level. If this alert indicator flashes during operation, stop the machine immediately and engage the parking brake. Stop the engine and investigate the cause of the fault.

High Inlet Air Temperature (38) - The air inlet temperature is too high. If the alert indicator comes on, change operating techniques or park the machine in order to allow the air cooler to cool down. If the situation continues, consult your AVSpare dealer.

Primary Steering (39) - This light indicates that the oil pressure for the primary steering is low. The indicator may also indicate a failure of the primary steering. The secondary steering (if equipped) should be automatically activated. If this alert indicator flashes during operation, stop the machine immediately and engage the parking brake. Stop the engine and investigate the cause of the fault.

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

Note: Secondary steering only works while the machine is moving. Directional changes can be made when the machine operates under secondary steering.

Secondary Steering (40) (if equipped) - This light indicates that the secondary steering is functioning. When you turn the engine start switch 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 of the fault. Do not operate the machine until the fault has been corrected.

Functional Test

The AVSpare Monitoring System performs an automatic internal test when the machine is activated. Turning the engine start switch from the OFF position to the ON position will activate the test.

The test verifies proper operation of the outputs (displays, indicator lamps, and audible alarms).

The internal circuits are automatically checked.

The operator must observe the outputs in order to determine whether the displays are operating properly. The length of time for the test is approximately three seconds.

During this test, all alert indicators flash. Also, the display window shows the following information:

  • All units of measurement (degrees Celsius, kPa, miles, km, rpm, and liters)

  • "X10" indicator

  • Symbol for hour meter

  • "8.8.8.X.8.8." on the digital readout

The tachometer and the gauge needles ramp straight up. Then, the gauge needles go to the right and to the left. The gauge needles then go to the final position.

  • The gear/direction readout shows an asterisk.

  • The digital speedometer shows "188" mph and km/h.

  • The indicator lamp is on continuously.

  • The audible alarm sounds once.

The display then goes into the Normal Mode of operation or the display scrolls through the modes if the service input and the clear input are grounded or the operator switch input is grounded.

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