PRECAUTIONS DURING OPERATION

It is prohibited to use the swing force for operations. Be careful not to compact the soil or damage earth mounds as a result of the swinging force. When swinging, do not dig the bucket teeth into the soil.

It is prohibited to use the travel force for operations. Do not move off and excavate with the bucket left dug into the ground.

Do not carry out operations with the hydraulic cylinder at the end of its stroke. When working with the machine, do not move the cylinder to the end of its stroke but leave a small safety margin.

It is prohibited to use the dropping force of the bucket for operations. Do not use the dropping force of the bucket for digging. Do not use the dropping force of the bucket as a pickaxe, breaker, or pile driver.

Be careful of stability when swinging.

During swing operations, the stability of the machine differs to the front, rear, left and right, and there is danger that itmay tip over.

It is prohibited to use the tilt operation for digging.

Do not set the teeth vertically when the bucket is pulled in, and then use the tilt operation to carry out digging.

It is prohibited to grip rocks.

Do not use the bottom dump bucket to grip rocks.

It is prohibited to use the bucket for leaving operations.

Using the rear bucket to carry out leveling operations will bring an excessive force to bear on the work equipment, so do not use the rear bucket in this way.

Be careful not to spill the load.

When the bucket is fully loaded, do not raise the boom fully. If the boom is raised fully, the load will spill to the rear and cause danger to the operator.

Be careful not to hit the undercarriage.

If the upper structure is set diagonally to the track frame when carrying out digging operations, the work equipment will hit the track links.

Scraping-down operations are prohibited.

Never use the front bucket of a bottom-dump bucket to scrap down rocks or soil.

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.

Phenomena that do not indicate failure

Note that the following phenomena are not faults:

● At the beginning and end of a swinging, a noise may sometimes be emitted from the brake valve.

● When descending a steep slope at low speed, a noise may sometimes be emitted from the travel motor.

● The arm may sometimes stop when the bucket teeth become more or less horizontal.

● The bottom dump of the bucket may sometimes stop at the bottom horizontal position when the bottom dump control lever changes from open to close.

Excavator Work

In addition to the following, it is possible to further increase the range of applications by using various attachments.

Shovel Work

This is suitable for digging a place which is higher than the machine's position. It is most efficient if the arm s digging angle is from vertical to 60í forward, and the arm cylinder is used effectively.

Loading Work

About half the time taken for digging and loading operations is used for swinging.

The most efficient method of operation is to keep the swing angle as small as possible but conforming to topography. Loading is easier if the exca vator is placed beside the dump truck for loading. This way means more earth can be loaded more effectively than by a loader working behind the truck.