Filter
Top Products
HYDRAULIC SYSTEM
General
The task of the hydraulic system is to operate the ma-
chine’s functions by means of hydraulic pressure and
fl ow. The system consists of hydraulic pump, tank,
cooler, hydraulic motor, hydraulic cylinders, fi lters and
valves of various kinds. Hoses or pipes connect the
components with each other.
Valves are used to control the hydraulic system’s
pressure, volume rate of fl ow and direction. Pressure
control valves limit or reduce the pressure to the value
required. Volume control valves affect the hydraulic
fl uid’s fl ow and thereby the speed of the functions.
Direction control valves direct the hydraulic fl uid to the
machine’s different functions.
The hydraulic pump is of the variable displacement
type and delivers a fl ow of 0-65 l/min (0-17 gal/min).
Main pressure
The hydraulic system has two main pressures.
• Standard pressure is 200 Bar.
• Increased main pressure is 250 Bar.
Increased main pressure is used when the outriggers
are down and when concrete cutters are used with
increased tool pressure.
If concrete cutters with increased tool pressure are
operated at the same time as another function, the
machine returns to standard pressure.
Pressure cut-off
Functions equipped with pressure cut-off have a
reduced pre-set maximum pressure. The telescopic
arm is equipped with a pressure cut-off that produces
a maximum of 180 Bar.
Cooler
The cooler has an integrated bypass valve that pro-
tects against overpressure in conjunction with, for
example, cold start.
18
- English