Malfunctions during crane operation
14.6 Hydraulic emergency operation
Operating manual GMK 6400 3 112 993 en 14 - 59
12.07.2013
14.6 Hydraulic emergency operation
With this additional equipment, the truck crane is equipped with an hydrau-
lic emergency bleed valve in accordance with BGR 159 (4.2.8). This allows
small loads to be transported in case of emergency, e.g. in the event of an
engine failure.
14.6.1 Functionality
The hydraulic emergency operation BGR 159 enables:
– Emergency operation of the main hoist, derricking gear, and slewing gear
– Emergency supply of another truck crane that also has a hydraulic emer-
gency operation BGR 159
Emergency operation
A transformer (1) serves as a power source for
the crane's hydraulic system. The transformer
is powered by the carrier's hydraulic system
or by the emergency supply of another truck
crane.
The hydraulic circuits are switched with the
valves (2).
The control levers (3) regulates the direction of
movement and the speed.
s
G
Risk of accident due to improper use
Operate in hydraulic emergency operation only to transport small loads in
emergencies and have the malfunction rectified as soon as possible. Crane
operation in hydraulic emergency operation is prohibited since it is not
monitored by the RCL.
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