Malfunctions during crane operation
14.6 Hydraulic emergency operation
14 - 70 3 112 xxx en Operating Manual GMK6300L
xx.xx.xxxx
For emergency operation
• Remove the cover over the valves 1 to 5.
• Switch the valves 1 to 5 to the positions for
the required crane movement – as shown in
the following table.
To raise the boom, for example, you must
switch the valve 3 up diagonally. Valves 1, 2, 4
and 5 must point down diagonally.
G
Danger from mutual interference of the power units!
Always only switch valves for one crane movement up diagonally at a time.
This prevents wrong crane movements being performed and several
movements being performed unintentionally at the same time.
Emergency operation
for crane movements
Valves
diagonally
up
Valves
diagonally
down
Additional switching operations
Lifting 1 2, 3, 4, 5
Valve Y1105 on continuous operation;
à p. 14 - 71
Lowering 1 2, 3, 4, 5
Valve Y1104 on continuous operation;
à p. 14 - 71
Raise 3 1, 2, 4, 5 None
Lower 5 1, 2, 3, 4 None
Slewing to the left or
right
2, 4 1, 3, 5
Valve 6 closed;
à p. 14 - 72
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