Malfunctions during crane operation
14.6 Hydraulic emergency operation
Operating Instructions GMK5250L 3 302 633 en 14 - 47
27.09.2017
14.6 Hydraulic emergency operation
H
This section only applies to the standard hydraulic emergency operation. If
the truck crane is equipped with an hydraulic emergency operation system
to BGR 159;
à p. 14 - 51.
14.6.1 Operating principle
The hydraulic emergency operation is intended for lifting the main boom
when the engine is defective and allows raising of the boom and lowering
of the main hoist.
A hydraulic energy source (nominal pressure
100 bar (1,450 psi)) is connected to the ports (1)
to supply the crane's hydraulic system.
Raising is always enabled. Various circuits
must be switched for lowering.
The crane movements occur directly after
switching on the energy source.
s