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unigreen 21
distributor of the sprayer only when the cylinders are being used.
We recommend having qualified personnel do any adjustments.
5.2 AIR-ASSISTED BOOMS
These are booms that use air to make the treatment more effective
and decrease wind drift.
They are equipped with a fan (normally hydraulic) and an AIR-
SLEEVE that transports the airflow along the entire length of the
boom.
They come with their own use and maintenance handbook, en-
closed with the machine.
5.3 SELF-LEVELING DEVICES
The self-levelling device keeps the boom parallel to the ground to be treated.
It works thanks to the effect of gravity in all the models (except TDL). The
oscillation can be blocked mechanically (TDE-TDM) or hydraulically (TDI).
The Work boom has a self-levelling device with an automatic block based on
cables and springs.
The self-levelling device only works on flat ground, for hilly terrain we
recommend the version with trim corrector (TDI 2P) or hydraulic LEVELING
(TDL), which lets the operator position the boom with an inclination that is
suitable for the ground.
To use, check:
a)that the boom has been mounted in the centre, the weight of the boom must
be supported equally on the two halves. To check this, free the self-levelling
device from the mechanical (or hydraulic) block and by moving the boom make
sure it automatically adjusts its position to be parallel to the ground.
b) in the models that have an adjustable connecting rod, by adjusting the
same, it is possible to obtain small variations in trim that can be useful on
slightly uneven terrain.
c) in the hydraulic versions it is possible to fit a hydraulic cylinder (TDI 2P)
instead of the connecting rod that is adjusted by hand.
d) to complete the self-levelling device we recommend the dragging jet-saver
protections
e)keep the sliding parts well greased.
5.3.1 VARIABLE GEOMETRY
Some models of hydraulic boom are equipped with a variable geometry system
of the side arms for independent inclination, this system can be used as an
alternative to the trim correction or combined with the same.
The angle of the arms is controlled by the operator with electrohydraulic
controls.
Self-levelling
Air-assisted booms
Self-levelling blocking system
Variable geometry