Komatsu excavator controller five major functions, PC400

1 driving speed

The "Travel Speed" button can be used to select one of the high speed and low speed travel speeds.

Select the "high speed" driving speed, the controller will activate the driving speed electromagnetic coil to increase the driving speed according to the load. Selecting "low speed" will release the driving speed electromagnetic coil, and the driving speed will decrease.

2 backup system

The controller has a backup system to prevent uncontrolled pump or engine operation.

3 Prevent engine high speed start

After the engine is stopped, the traditional excavator spare parts can start the high speed by setting the engine speed knob to 10.

The following information is about how to prevent the engine from starting at high speed. If the engine start switch is set to OFF, the reveller actuator will stop working. The governor lever remains in the same position. If the engine is stopped and the AEC is in the second position During the phase operation, the engine will restart at 1300r/min or lOOOr/min. If the engine is stopped and the low idle switch is in the ON position, the engine will restart at 1300r/min or lOOOr/min. The functional design is to keep the position of the governor actuator unchanged when the operation is terminated. Any of the following conditions will cause the operation to terminate.

Komatsu excavator spare parts controller five major functions, PC400

4 Prevent overspeed when the engine is low oil pressure

This function can be used to prevent high-speed starting under low engine oil pressure. After replacing the engine oil filter, it takes a long time for the engine oil pressure to reach the specified level. If the engine is running at the position of the speed knob 10, the turbocharger May be damaged.

If the engine oil pressure switch is turned on, the engine speed is limited to the speed 5 position. If the governor actuator is at high speed before the engine is stopped, the engine speed will also be limited to the speed 5 position, and the engine will start at speed 5 This function is designed to keep the position of the governor actuator unchanged when the operation is terminated. Any of the following conditions will cause the operation to terminate.

Use the joystick or pedal. The implement/turn switch, travel switch or boom lift pressure switch to the ON position.

Use the engine speed knob.

Use AEC.

Use the power mode switch.

Then, the engine speed corresponds to the position on the speed knob. Operating the low idle switch will also terminate this function. However, even if the engine speed knob is adjusted to a position greater than 2, the engine speed is still lOOOr/min. If the governor actuator At high speed before the engine stops, the engine will start again at high speed. The engine speed will be reduced to 1300r/min. After restarting the engine for 3s, the engine speed will automatically drop. The second stage of AEC must be in the ON position.

5 turntable lock system

When using any joystick, stick, bucket, turntable or any joystick of the accessory, the turntable stop actuator immediately relieves pressure. When all the komatsu spare parts joysticks return to neutral for 6.5s, the turntable stop actuator begins to relieve pressure. When the hydraulic pressure is turned on When the joystick is placed in the locked position, the turntable stop actuator is not relieved. If equipped with a fine-tuning turntable attachment, the turntable stop actuator can be relieved by turning the micro-turn switch to the ON position. https://jnjmzm.wixsite.com/sdjygcjx