Hydraulic Emergency Operation; Operating Principle - Manitowoc Grove GMK6300L Operating Manual

14.6
G
14.6.1
Operating Manual GMK6300L

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.
Risk of accidents due to improper use!
Use hydraulic emergency operation only to transport small loads in emer-
gencies. Have the malfunction rectified as soon as possible. Crane opera-
tion in hydraulic emergency operation is prohibited since it is not moni-
tored by the RCL.

Operating principle

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 BGR159.
Emergency operation
The energy source for the crane hydraulic sys-
tem is a transformer (1), which is driven by
– the carrier hydraulic system or
– the emergency hydraulic unit or
– the emergency supply of another truck
crane
The hydraulic circuits are switched with the
valves (3).
The control lever (2) regulates the direction of
movement and the speed.
3 112 xxx en
Malfunctions during crane operation
14.6 Hydraulic emergency operation
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