
Operating and maintenance instructions - H14TX - HA16TPX
25
Caution!
3 -
OPERATING PRINCIPLE
3.1 -
HYDRAULIC CIRCUIT
All the machine’s movements are powered by hydraulic energy from a self-
regulating open circuit piston pump, equipped with a "LOAD SENSING"
capacitor.
3.1.1 - Controlling machine movements
3.1.1.1 -Travel, slewing, boom lifting and telescoping
These controls use proportional distribution (compensated in pressure).
The pump flow adapts automatically to demand by the "LOAD SENSING"
channel. In neutral, there is no pump flow.
3.1.1.2 - H16TP(X) jib lifting, basket rotation, compensation and
steering
These movements are controlled by 4-channel on/off electro-valves. A
proportional distributor tray supplies the flow required for these
movements.
3.1.2 - Actuators
The type of actuator depends on the type of movement.
3.1.2.1 -Steering, telescoping, boom lifting, H16TP(X) jib lifting
These movements are controlled by cylinders equipped with tight, covered
balancing valves (except for steering).
Adjustments must be made by
specialised personnel only.
3.1.2.2 -Platform rotation
Platform rotation uses a hydraulic motor. Rotation speed can be adjusted
by flow limiters.
3.1.2.3 -Compensation
Compensation operates by oil transfer between 2 cylinders with similar
characteristics. The receiver compensation cylinder is equipped with a
double-covered controlled valve.
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