Operating elements for crane operation
9.2 Short description of the operating elements
9 - 112 3 302 690 en Operating manual
GMK4100L-1
23.11.2017
Lifting cylinder position display
The current position of the counterweight lift-
ing cylinders is shown by different symbols:
à p. 12 - 86
Extending/Retracting the lifting cylinders
Pre-tensioning pressure display
1 Green – extended
2 Green – retracted
3 Yellow – intermediate position
4 Violet – error
5 Extended length in per cent (%)
1 Extend:
– Display (5) and symbol (3) yellow or
– Display (6) and symbol (4) yellow
Select symbol and confirm – slewing is
disabled after extending
2 Retract:
Select symbol and confirm – after reach-
ing the end position, the counterweight is
pre-tensioned
The movement stops after the button is
released, and when an end position is
reached;
à p. 12 - 86.
– Green: Pre-tensioning pressure reached
–Red: Pre-tensioning pressure too low – pre-tension the counterweight
à p. 12 - 88
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