3-6 BA 357-00 * 3.0 * 35700_03_Einleitung.fm
3 Introduction
Work hydraulics
The machine is equipped with a hydraulic system that is
supplied from the hydraulic oil reservoir.
A gear pump supplies both the work hydraulics and the steering
hydraulics with the required pressure. The gear pump is driven by
a 3-phase alternating current electric motor (operating motor). The
operating motor is installed on the machine's left side,
in the access area between the axles.
The oil flow of the pump depends on the speed of the operating motor.
The operating motor runs at base speed as soon as the operator has
taken his seat in the operator's seat, the ignition key is in position II and
the motor isolating switch has been unlocked. The base speed is sufficient
for supplying the hydraulic steering and providing the boost pressure.
To safeguard the work hydraulics, temperature monitors have been
integrated in the machine. If a temperature monitor reacts, the
performance of the operating motor is reduced in dependence on the
temperature.
If the joystick is used to call up hydraulic work functions, the speed of the
operating motor is increased via a controller, to make a corresponding
volume flow available.
The hydraulic system is equipped with pressure control valves and filters.
Indicator lights on the instrument panel show if the temperature specified
on the operating motor has been exceeded.
Cooling system
A hydraulic oil radiator (optional), which cools down the hydraulic oil,
is (optionally) located on the left side of the machine.
Indicator lights on the instrument panel illuminate in case of overheating of
the hydraulic oil temperature, even if no hydraulic oil radiator (optional)
is installed on the machine.
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