iteco IT 10151 - Operating Principles; Hydraulic Circuit; Electric Circuit

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IT10151 - IT12151
OPERATING AND MAINTENANCE HANDBOOK
Operating principles
The proportional control machine has controlled by an electronic
system which accordingly with joystick movements on the platform
control panel, it supplies more or less energy to the main electrical
pump.
Here below the main features of the hydraulic, electric and electronic
circuits are described.
Hydraulic circuit
Two electrical pumps supply the hydro power required for the ma-
chine actions:
- main electrical pump for liing and traction action (proportional-
controlled)
- secondary electrical pump for steering movement (On/O-control-
led)
Two hydraulically-operated cylinders carry out liing and lowering.
In case of failure in the electrical pump, a manually operated action
will allow the scissors lowering.
Two hydraulic motors installed to the back wheels assure the traction
action.
Steering is controlled by a hydraulically-operated cylinder.
All movements are operated by solenoid valves. Except for steering,
the movement graduality is obtained by the electronic control on the
rotation speed of the electrical pump motor.
Electric circuit
48V baeries supply the energy required for the machine operation; a
baery charger allows their recharge.
To power the electronic circuit, a DC/DC converter transforms the
baery voltage from 48V to 24V.
Pressing the red emergency stop push buon in the ground control
panel and in the platform control box, any function of the machine is
disconnected, except for safety indicators (pilot lights and audible
alarm).
Only by turning the key of the ground control panel in the OFF posi-
tion, machine functions are completely disconnected.