POWER MAX./SWIFT SLOW-DOWN

During operation, power up/speed down of work equipment can be performed by on-touch. Use this function effectively in combination with working mode.

1. When starting switch is turned ON, the power up lamp turns on.

When SET switch is pressed once, the speed down lamp turns on and the power up lamp goes out, and when pressed again, the oppo-site occurs.

2. When the left knob button is depressed once (single click) and kept depressed, power keeps increasing while depressed. However, power up automatically completes after 8.5 seconds.

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12.OPERATION

12.10 HANDLING ACTIVE MODE

Make full use of the active mode to match the purpose and conditions of the opeeration in order to carry out operations effectively and efficiently.

The active mode selector switch can be turned ON (lights up) in order to provide quick levelling operations and effective deep digging and load-ing operations.

ON lights up: Active mode ON ON goes out: Active mode cancelled

The ON lamp is off when the engine is started.

If it is turned ON (lights up), it is possible to enter the active mode from any working mode.

Even when it is turned ON (lights up), the working mode display does not change. When the lamp goes out, the system returns to the original working mode.

NOTICE

There is danger that the hydraulic equipment may be broken if breaker operations are carried out in the active mode, so never use the active mode for breaker operations.

REMARK

• Use the active mode with the fuel control dial turned to the MAX posi-tion. If it is not at the MAX position, it will be impossible to achieve a suitable increase in the work equipment speed.

• The active mode includes a load detection function. If a heavy load is applied, the engine speed will drop 100 - 200 rpm to inform the op-erator that there is a heavy load, but the work equipment power will not drop. (In the active mode or when travelling, the load detection function is actuated.)

• Active power function

When finishing ground quickly with heavy loads or digging deep and loading, use the active power-up function according to the following procedures.

12.OPERATION

1. Turn on the active mode selector switch (lights up).

2. While in this condition, press and hold the knob switch of the left-hand work equipment lever once (single click).

3. Since the machine returns to the normal active mode in 8.5 seconds after the switch is pressed, use the active power-up mode effectively for heavy and quick work.

앩 The load sensing function is installed to the active mode. If the ma-chine is set to the active power-up mode, however, the load sensing function is turned off and the engine speed is increased to increase the speed of the work equipment.

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12.OPERATION

12.11 PROHIBITIONS FOR OPERATION

• If it is necessary to operate the work equipment control lever when the machine is travelling, stop the machine before oper-ating the work equipment control lever.

• If the lever is moved inside the deceleration range, engine speed will suddenly rise. Operate the levers carefully.

• Never operate the machine on a rock bed (hard or soft rock).

Prohibited operations using swing force

Do not use the swing force to compact soil or break earth mounds or walls.

When swinging, do not dig the bucket teeth into the soil.

These operations will damage the work equipment.

Prohibited operations using travel force

Do not leave the bucket dug into the ground and use the travel force to excavate. This will bring excessive force to bear on the rear of the ma-chine

Precautions when operating hydraulic cylinders to end of stroke If the cylinder is operated to the end of its stroke during operations, force will be brought to bear on the stopper inside the cylinder, and this will reduce the life of the machine. To prevent this, always leave a small safety margin when operating the cylinders.

Prohibited operations using dropping force of bucket

Do not use the dropping force of the bucket as a pickaxe, breaker, or pile driver. This will bring excessive force to bear on the rear of the ma-chine, and will not only damage the machine but is also dangerous.

WARNING

12.OPERATION

Prohibited operations using dropping force of machine Do not use the dropping force of the machine for digging

Digging rocky ground

It is better to excavate hard rocky ground after breaking it up by some other means. This will not only reduce damage to the machine but make for better economy.

Sudden lever shifting during Hi-speed travel prohibited

Never carry out sudden lever shifting as this may cause sudden start-ing.

 Avoid sudden lever shifting from forward to reverse (or vice versa).

 Avoid sudden lever shifting change such as sudden stopping from near top speed (lever release operation).

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12.OPERATION

12.12 PRECAUTIONS FOR OPERATION

PRECAUTIONS WHEN TRAVELLING

When travelling over obstacles such as boulders or tree stumps, the machine (in particular, the undercarriage) is subjected to a large shock, so reduce the travel speed and travel over the obstacle at the center of the tracks. As far as possible, remove such obstacles or avoid travelling over them.

PRECAUTIONS AT Hi-SPEED TRAVEL

On uneven roadbeds such as rock beds or uneven roads with large locks, travel at Mi of Lo speed. When Hi-speed travelling, set the idler in the forward direction.

PERMISSIBLE WATER DEPTH