Liebherr Hydraulic excavator R 974 C Operating manual 30724 - PDF DOWNLOAD

Page 192

Control and operation

Operating manual

Working with the machine

With the specified load, the machine can be rotated from 360° on even and horizontal ground.

Check of the overload warning system The overload warning system must be checked for correct function every time the machine is started and before load lifting work. Slowly extend the hoist cylinder to the stop. Operate the hoist cylinder to the stop. The overload warning status symbol appears on the display. An audio warning sounds in the operator cab. If a malfunction occurs: Do not lift loads. Have the overload warning system repaired.

Operation of the overload warning system DANGER! Tipping over of the machine! The overload warning system does not shut down the machine if the permissible load torque is exceeded. The operator of the machine is only informed of the situation. Death. Follow the safety instructions related to load lifting. Follow the instructions if the overload warning system is triggered. Push the key S18. The overload warning system is activated. The LED of the key comes on. If the overload warning system is triggered: – The overload warning status symbol is shown on the display. – An audio warning sounds in the operator cab. – The control elements of the machine continue to operate. Reduce the reach. or Lower the load to the ground without increasing the reach. Deactivation of the overload warning system NOTICE There is an increased pressure in the hydraulic cylinders during earth-moving operations! If the overload warning system is activated, it is triggered permanently. Switch off the overload warning system for earth-moving operations. Push the key S18. The overload warning system is deactivated. The LED of the key goes out of view.

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R 974 C / 10069856


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5.2Cleaning machine

1hr
pages 290-394

5Maintenance

2min
pages 287-289

Troubleshooting

1min
pages 284-285

Troubleshooting

6min
pages 278-283

Troubleshooting

10min
pages 266-271

4Troubleshooting

3min
pages 263-265

Control and operation

1min
pages 260-262

Control and operation

3min
pages 256-259

Control and operation

2min
pages 254-255

Control and operation

4min
pages 248-253

Control and operation

2min
pages 246-247

Control and operation

1min
pages 244-245

Control and operation

10min
pages 230-243

Control and operation

5min
pages 224-229

Control and operation

4min
pages 220-223

Control and operation

8min
pages 212-219

Control and operation

1min
pages 210-211

Control and operation

2min
pages 206-209

Control and operation

1min
pages 204-205

Control and operation

1min
pages 202-203

Control and operation

3min
pages 198-201

Control and operation

3min
pages 194-197

Control and operation

1min
pages 192-193

Control and operation

6min
pages 186-191

Control and operation

1min
pages 184-185

Control and operation

4min
pages 180-183

Control and operation

1min
pages 178-179

Control and operation

2min
pages 176-177

3.4Working with the machine

4min
pages 170-175

the machine into operation

14min
pages 157-169

Control and operation

1min
pages 156-157

Control and operation

12min
pages 142-155

Control and operation

3min
pages 138-141

Control and operation

1min
pages 136-137

Control and operation

2min
pages 134-135

Control and operation

9min
pages 126-133

Control and operation

4min
pages 120-125

Control and operation

1min
pages 118-119

Control and operation

6min
pages 112-117

Control and operation

8min
pages 106-111

Control and operation

1min
pages 104-105

Control and operation

1min
pages 102-103

Control and operation

1min
pages 100-101

Control and operation

3min
pages 96-99

Safety instructions, Signs on the machine

1min
pages 86-87

Safety instructions, Signs on the machine

4min
pages 78-81

Safety instructions, Signs on the machine

3min
pages 76-77

2Safety instructions, Signs on the machine

28min
pages 61-75

1Product description

1min
pages 11-15
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