NOTE
For remote-operated cranes the levers on
the main control valve are only for
emergency operation.
FOR EMERGENCY O
PERATION ONLY
FOR EMERGENCY OPERATION ONLY
4.7. Dump valves
Dump valve 1.
(1)
Allows operation of the crane functions. To prevent high
pressure and thereby unnecessary heating of the oil there
is an automatic dumping function. When no lever
movement has been made for 3 seconds the dump valve is
opened and the oil is returned directly to the hydraulic tank.
As soon as the operator moves a lever the valve closes.
Dump valve 2.
(2)
Allows operation of the stabiliser extensions and legs only
when this valve is activated. The dump valve 2 will be placed between the main control valve and
the stabiliser control valve. The dump valve 2 must be activated from the User Interface before the
stabiliser system can be controlled.
4.8. Pressure-reducer filter
Pressure-reducer filter integrated in the main control valve.
The oil goes through the filter and then to the positioner(s).
The HiPro system
44
HIAB L-HiPro 145/165/195/235