EXPLANATION OF COMPONENTS OPERATION

Truck counter reset button

These buttons (2) and (3) are used to delete the count for the previous operation and reset the counter to 0 before starting the counter operation.

The procedure is as follows.

When this button (2) is pressed, the confirmation screen in the diagram on the right is displa yed. Press t he (YES) button. Count (A) for the previous operation on the dump counter screen is reset to 0.

● If the (NO) button is pressed, the count for the previous operation remains as it is and is not reset to 0.

When this button (3) is pressed, the confirmation screen in the diagram on the right is displa yed. Press t he (YES) button. Count (B) for the previous operation on the dump counter screen is reset to 0.

● If the (NO) button is pressed, the count for the previous operation remains as it is and is not reset to 0.

REMARK

● When the count is reset to 0 in the operation above, truck counter displays (C) and (D) are also set to 0. (A) is linked to (C), and (B) is linked to (D).

Abnormality Display Screen

If any abnormality occurs on the machine, the screen automatically switches to the abnormality display screen, and displays the nature of the failure and the action to take. Take the action that is given on the display.

OPERATION ON SCREEN, METHOD OF CHECKING

(The screen explained below is the screen displayed when there is an abnormality in a warning item: Abnormality in engine water temperature.)

● The code displayed on screen (1) is the code number for the abnormal item. When contacting your Komatsu distributor, inform this code number together with the condition of the machine. This will assist in achieving smooth solution of the abnormality.

● If the delete switch displayed on screen (2) is pressed, the abnormality display screen will go out and the previous normal screen will be displayed. If it is desired to display the abnormality screen again, turn the starting switch OFF, then turn it ON again.

● The abnormality display screen is displayed according to the warning item column or emergency item column (3) and respective specified content (4).

Warning screen

● When the warning screen is displayed, check the location of the problem according to the instructions displayed on the screen and carry out maintenance quickly. When a warning is displayed, the warning item on the screen is displayed in a yellow band.

Emergency stop screen

● When the emergency stop screen is displayed, stop the engine immediately or run it at low idling, and follow the instructions given. When a warning is displayed, the emergency stop item is displayed in a red band.

● The value displayed on screen (5) is the total number of occurrences of the abnormality item so far.

● The value displayed on screen (6) shows the order of the displayed abnormality item in the total for abnormality items. After displaying all the abnormality items, the screen again immediately switches to display from the first item.

Warning Items

The item column on the warning screen is displayed in a yellow band. The warning items are as follows.

Front engine water level low

This warning display warns the operator that the level of cooling water in the radiator for the front engine has dropped.

● Check before starting

When the starting switch is at the ON position and the engine is stopped, this display is given if the radiator cooling water level (level of water in the reserve tank) is low. If this abnormality is displayed, check the radiator cooling water level (level of water in the reserve tank) and add water.

● When engine is running

If the radiator cooling water level (level of water in the reserve tank) is low, this warning is displayed, the radiator water level monitor lamp on the machine monitor flashes, and the alarm buzzer sounds . If this happens, stop the engine, check the radiator water level, and add water.

Stop the machine on level ground when inspecting the machine.

Rear engine water level low

This warning display warns the operator that the level of cooling water in the radiator for the rear engine has dropped.

● Check before starting

When the starting switch is at the ON position and the engine is stopped, this display is given if the radiator cooling water level (level of water in the reserve tank) is low. If this abnormality is displayed, check the radiator cooling water level (level of water in the reserve tank) and add water.

● When engine is running

If the radiator cooling water level (level of water in the reserve tank) is low, this warning is displayed, the radiator water level monitor lamp on the machine monitor flashes, and the alarm buzzer sounds . If this happens, stop the engine, check the radiator water level, and add water.

Stop the machine on level ground when inspecting the machine.

Front engine oil level low

This warning display warns the operator that the level of oil in the front engine oil pan has dropped.

● Check before starting

When the starting switch is at the ON position and the engine is stopped, if the oil level in the engine oil pan is low, this warning is displayed and the engine oil level monitor lamp on the machine monitor flashes. If this happens, check the oil level in the engine oil pan and add oil.

Rear engine oil level low

This warning display warns the operator that the level of oil in the rear engine oil pan has dropped.

● Check before starting

When the starting switch is at the ON position and the engine is stopped, if the oil level in the engine oil pan is low, this warning is displayed and the engine oil level monitor lamp on the machine monitor flashes. If this happens, check the oil level in the engine oil pan and add oil.

Hydraulic oil level low

This warning display warns the operator that the level of oil in the hydraulic tank has dropped.

● Check before starting

When the starting switch is at the ON position and the engine is stopped, if the oil level in the hydraulic tank is low, this warning is display ed and the hydraulic oil level monitor lamp on the machine monitor flashes. If this happens, check the oil level in the hydraulic tank and add oil.

Stop the machine on level ground when inspecting the machine.

Remark

If the level of the oil in the hydraulic tank is correct but an abnormality is displayed during the check before starting in one of the following two conditions (1) or (2), there is no abnormality.

(1)The engine is started when the machine is stopped on a slope of approx. 15° or more.

(2)The engine is started when the machine is stopped with the boom cylinder fully extended.

Front battery charge abnormal

This warning display warns the operator that there is an abnormality in the charging system while the front engine is running.

● When engine is running

If an abnormality occurs in the charging system, this warning is displayed and the battery charge monitor lamp on the machine monitor flashes. If this happens, stop the engine and check the charging system.

Rear battery charge abnormal

This warning display warns the operator that there is an abnormality in the charging system while the rear engine is running.

● When engine is running

If an abnormality occurs in the charging system, this warning is displayed and the battery charge monitor lamp on the machine monitor flashes. If this happens, stop the engine and check the charging system.

Front air cleaner clogged

This warning display warns the operator that the air cleaner for the front engine is clogged.

● When engine is running

If the air cleaner element becomes clogged, this warning is displayed and the air cleaner clogged monitor lamp on the machine monitor flashes. If this happens, stop the engine, then check, clean, or replace the air cleaner element.

Rear air cleaner clogged

This warning display warns the operator that the air cleaner for the rear engine is clogged.

● When engine is running

If the air cleaner element becomes clogged, this warning is displayed and the air cleaner clogged monitor lamp on the machine monitor flashes.

If this happens, stop the engi ne, then check, clean, or replace the air cleaner element.

Emergency Stop Items

The item column on the emergency stop screen is displayed in a red band.

The emergency stop items are as follows.

Hydraulic oil temperature high

This emergency stop display warns the operator that the hydraulic oil temperature is abnormal.

● When engine is running

If the hydraulic oil temperature goes above 100°C, this warning is displayed, hydrau lic oil temperature monitor lamp (C) on the machine monitor flashes, and the alarm buzzer sounds.

If this happens, stop operati ons, run the engine at low speed or stop it, and wait for the hydraulic oil temperature to go down.

Hydraulic oil filter clogged

This emergency stop display warns the operator that the hydraulic oil filter is clogged.

● When engine is running

If the hydraulic oil filter becomes clogged during operations, this warning is displayed and the hydraulic oil filter clogged monitor lamp on the machine monitor flashes. If this happens, stop operations, then stop the engine, and check, clean, or replace the hydraulic oil filter.

Front engine coolant temperature high

This emergency stop display warns the operator that the water temperature in the front engine cooling system is abnormal.

● When engine is running

If the front engine coolant temperature goes above 105°C, this warning is displayed, engine coolant temperature monitor lamp (A) on the machine monitor flashes, and the alarm buzzer sounds.

If this happens, stop operations, stop the engine, check the coolant level, check for l eakage, and wait for the engine coolant temperature to go down.

REMARK

If the engine coolant temperature goes above 102°C, the engine is automatically run at low speed.

Rear engine coolant temperature high

This emergency stop display warns the operator that the water temperature in the rear engine cooling system is abnormal.

● When engine is running

If the rear engine coolant temperature goes above 105°C, this warning is displayed, engine coolant temperature monitor lamp (B) on the machine monitor flashes, and the alarm buzzer sounds.

If this happens, stop operations, stop the engine, check the coolant level, check for leakage, and wait for the hydraulic oil temperature to go down.

REMARK

If the engine coolant temperature goes above 102°C, the engine is automatically run at low speed.

Monitor network abnormal

This emergency stop display warns the operator that there is an abnormality in the electrical system of the machine monitor.

● When engine is running

If an abnormality occurs in the machine monitor, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Pump controller network abnormal

This emergency stop display warns the operator that there is an abnormality in the electrical system of the pump controller.

● When engine is running

If an abnormality occurs in the electrical system of the pump controller, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Short circuit in swing holding brake circuit system

This emergency stop display warns the operator that there is an abnormality in the electrical system of the swing holding brake.

● When engine is running

If a short circuit occurs in the electrical system of the swing holding brake, this warnin g is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Disconnection in swing holding brake circuit system

This emergency stop display warns the operator that there is an abnormality in the electrical system of the swing holding brake.

● When engine is running

If a disconnection occurs in the electrical system of the swing holding brake, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Short circuit in front TVC solenoid circuit system

This emergency stop display warns the operator that there is an abnormality in the electrical system of the pump TVC valve of the front engine.

● When engine is running

If a short circuit occurs in the electrical system of the pump TVC valve of the front engine, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Disconnection in front TVC solenoid circuit system

This emergency stop display warns the operator that there is an abnormality in the electrical system of the pump TVC valve of the front engine.

● When engine is running

If a disconnection occurs in the electrical system of the pump TVC valve of the front engine, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Short circuit in rear TVC solenoid circuit system

This emergency stop display warns the operator that there is an abnormality in the electrical system of the pump TVC valve of the rear engine.

● When engine is running

If a short circuit occurs in the electrical system of the pump TVC valve of the rear engine, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Disconnection in rear TVC solenoid circuit system

This emergency stop display warns the operator that there is an abnormality in the electrical system of the pump TVC valve of the rear engine.

● When engine is running

If a disconnection occurs in the electrical system of the pump TVC valve of the rear engine, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Front fuel control dial circuit system abnormal

This emergency stop display warns the operator that there is an abnormality in the electrical system of the fuel control dial of the front engine.

● When engine is running

If a short circuit occurs in the electrical system of the fuel control dial of the front engine, this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Rear fuel control dial circuit system abnormal

This emergency stop display warns the operator that there is an abnormality in the electrical system of the fuel control dial of the rear engine.

● When engine is running

If a short circuit occurs in the electrical system of the fuel control dial of the rear engine , this warning is displayed and the alarm buzzer sounds.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.

Front engine oil pressure low

This emergency stop display warns the operator that the pressure of the front engine lubricating oil has dropped.

● When engine is running

If the pressure of the front engine lubricating oil has not reached the specified pressure, this warning is displayed and the alarm buzzer sounds.

If this happens, stop the engine, check the oil level, and check for leakage.

Rear engine oil pressure low

This emergency stop display warns the operator that the pressure of the rear engine lubricating oil has dropped.

● When engine is running

If the pressure of the rear engine lubricating oil has not reached the specified pressure, this warning is displayed and the alarm buzzer sounds.

If this happens, stop the engine, check the oil level, and check for leakage.

Front PTO oil temperature high

This emergency stop display warns the operator that the temperature of the front engine PTO lubricating oil is abnormal.

● When engine is running

If the temperature of the front engine PTO lubricating oil goes above 125°C, this warning is displayed and the alarm buzzer sounds.

If this happens, stop the engine, check the oil level, check for leakage, and wait for the oil temperature to go down.

Rear PTO oil temperature high

This emergency stop display warns the operator that the temperature of the rear engine PTO lubricating oil is abnormal.

● When engine is running

If the temperature of the rear engine PTO lubricating oil goes above 125°C, this warning is displayed and the alarm buzzer sounds.

If this happens, stop the engine, check the oil level, check for leakage, and wait for the oil temperature to go down.

No. 1, 2 front pump pressure abnormal

This emergency stop display warns the operator that the oil pressure of the front engine No. 1, 2 main pump at the front (engine side) has dropped or is abnormally high.

● When engine is running

If the oil pressure of the front engine No. 1, 2 main pump at the front (engine side) is below the specified pressure or is abnormally high, this warning is displayed. If this happens, stop the engine and check for leakage in the hydraulic circuit.

No. 1, 2 rear pump pressure abnormal

This emergency stop display warns the operator that the oil pressure of the rear engine No. 1, 2 main pump at the rear (outside left of machine) has dropped or is abnormally high.

● When engine is running

If the oil pressure of the rear engine No. 1, 2 main pump at the rear (outside left of machine) is below the specified pressure or is abnormally high, this warning is displayed. If this happens, stop the engine and check for leakage in the hydraulic circuit.

No. 3, 4 front pump pressure abnormal

This emergency stop display warns the operator that the oil pressure of the front engine No. 3, 4 main pump at the front (engine side) has dropped or is abnormally high.

● When engine is running

If the oil pressure of the front engine No. 3, 4 main pump at the front (engine side) is below the specified pressure or is abnormally high, this warning is displayed. If this happens, stop the engine and check for leakage in the hydraulic circuit.

No. 3, 4 rear pump pressure abnormal

This emergency stop display warns the operator that the oil pressure of the rear engine No. 3, 4 main pump at the rear (outside left of machine) has dropped or is abnormally high.

● When engine is running

If the oil pressure of the rear engine No. 3, 4 main pump at the rear (outside left of machine) is below the specified pressure or is abnormally high, this warning is displayed. If this happens, stop the engine and check for leakage in the hydraulic circuit.

Swing pump system abnormal

This emergency stop display warns the operator that the oil pressure of the swing pump is abnormal.

● When engine is running

If the oil pressure of the swing pump has not reached the specified pressure, this warning is displayed. If this happens, stop the engine and check for leakage in the hydraulic circuit.

Gear pump system abnormal

This emergency stop display warns the operator that the oil pressure of the gear pump has dropped.

● When engine is running

If the oil pressure of the gear pump is not within the specified pressure, this warning is displayed. If this happens, stop the engine and check for leakage in the hydraulic circuit.

VHMS monitor network abnormal

This emergency stop display warns the operator that there is an abnormality in the electrical system of the VHMS monitor.

● When engine is running

This is displayed if there is defective wiring between the VHMS controller and another controller or if there is an abnormal signal on the circuit.

If this happens, set the machine to a safe posture, then stop the engine.

Please contact your Komatsu distributor to have the system returned to normal.