Malfunctions during crane operation
14.6 Hydraulic emergency operation
14 - 64 3 112 993 en Operating manual GMK 6400
12.07.2013
For emergency operation
• Remove the cover over the valves 1 to 7.
• Switch the valves 1 to 7 to the positions for
the required crane movement – as shown in
the following table.
For raising, for example, switch the valve 3
outward. The valves 1, 2, 4, 5 and 7 must be
switched inward.
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 from being performed and several
movements from being performed unintentionally at the same time.
Emergency operation
for crane movements
Valves inward
(crane operation)
Valves outward
(emergency operation)
Lifting or lowering
2, 3, 4, 6
1, 5, 7
Raising the boom 1, 2, 4, 5, 6, 7 3
Lowering the boom 1, 2, 3, 4, 5, 7 6
Slewing to the left or
right
1, 3, 5, 6, 7 2, 4
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