322B, 322B L, 325B and 325B L Excavators Boom, Stick and Bucket Operation Caterpillar


Boom, Stick and Bucket Operation
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1.1. Digging
2.1. Lifting Objects
3.1. Machines that are Equipped with a Long Reach Configuration

Digging



Illustration 1g00101523

  1. Position the stick at a 70 degree angle to the ground.


    Illustration 2g00101525

  2. Position the bucket cutting edge at a 120 degree angle to the ground. Maximum breakout force can now be exerted with the bucket.


    Illustration 3g00101526

  3. Move the stick toward the cab and keep the bucket parallel to the ground.


    Illustration 4g00101527

  4. If the stick stops due to the load, raise the boom and/or perform a curl in order to adjust the depth of the cut.

  5. To apply the greatest force at the cutting edge, decrease the down pressure as you move the stick toward the cab.

  6. Maintain a bucket attitude that ensures a continuous flow of material into the bucket.

  7. Continue the pass in a horizontal direction so that material peels into the bucket.


    Illustration 5g00101528

  8. Close the bucket and raise the boom when the pass has been completed.


    Illustration 6g00101529

  9. Engage the swing control when the bucket is clear of the excavation.


    Illustration 7g00101530

  10. To dump a load, move the stick outward and open the bucket in a smooth motion.

Lifting Objects

------ WARNING! ------

To prevent injury, do not exceed the rated load capacity of the machine. If the machine is not on level ground, load capacities will vary.



NOTICE

Damage to bucket cylinder, bucket or linkage could result if slings are placed incorrectly.


There may be local regulations and/or government regulations that govern the use of machines which lift heavy objects. Obey all local and government regulations.

If this machine is used to lift objects within an area that is controlled by the European Directive "2006/42/EC", the machine must be equipped with a boom lowering control valve, a stick lowering control valve, and an overload warning device.

Japan regulations require some machines to use a shovel crane configuration in order to lift ceratin objects.

Contact your Cat dealer for additional information.

Short slings will prevent excessive load swing.



Illustration 8g00101531

Use the lifting eye that is provided on the linkage to lift objects.

If the lifting eye is used, the connection must be made with a sling or with a shackle.



Illustration 9g00101532

An unstable condition can exist if a load exceeds the machine load rating or if a heavy load is swung over an end or over a side.



Illustration 10g00101533

The most stable lifting position is over a corner of the machine.



Illustration 11g00101534

For the best stability, carry a load close to the machine and to the ground.



Illustration 12g00101535

Lift capacity decreases as the distance from the swing centerline is increased.

Machines that are Equipped with a Long Reach Configuration

Machines with a long reach configuration require larger swing drift than standard machines when stopping, because inertial force in time of swing is large. Taking this into account, adjustments are made in timing for applying the swing brakes and speed of swinging.

Machines with a long reach configuration could be damaged and stability of the machine would be adversely affected if a control was suddenly operated, because inertial force of work tool is large.

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