Malfunctions during crane operation
14.6 Hydraulic emergency operation with the hand pump
Operating manual 3 302 709 en 14 - 51
GMK5150L
12.01.2018
14.6 Hydraulic emergency operation with the hand pump
H
This section only applies to the standard hydraulic emergency operation.
With the appropriate equipment you can also use the hydraulic emergency
operation according to BGR 159;
à p. 14 - 59.
14.6.1 Operating principle
In hydraulic emergency operation, you can
operate the derricking gear and perform the
Lower main hoist movement, for example, to
raise the main boom in the case of a defective
engine.
The hand pump (1), which is activated by
switching over a valve, is used as the energy
source for the crane's hydraulic system.
The hydraulic circuits are switched via the
valves (2).
The crane movements are performed by
operating the hand pump.
G
Danger from mutual interference of the power units
Check the positions of the valves 1 to 5 for the hydraulic emergency opera-
tion in accordance with BGR (in case available) and, if necessary, switch to
Crane operation; Ã p. 14 - 67.
This prevents the power units suddenly starting to move.
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