horsch LEEB 4 LT, Operating Instructions Manual

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Punched screen
The punched screen prevents that coarse con-
taminants can enter into pump and spraying
system.
Dome screen / filling screen
The dome screen / filling screen prevents con -
taminants from entering when filling the solution
tank through the dome or the induction hopper.
The screen has a standard mesh size of 1 mm.
Suction filter
The suction filter clean the water / wash before
it enters into the centrifugal pump (mesh size
0.9 mm).
Overview of pressure filter elements
Meshes/
inch
Colour nozzle
size
Mesh size
[mm]
32 white
50 blue from ‚03’ 0.35
80 grey ‚02’ 0.20
100 red up to ‚015’ 0.15
Filter cleaning, see chapter Cleaning,
maintenance and repair.
3.14 Filter
NOTE
Use all specified filters of the filter equipment.
Clean the filters at regular intervals.
Trouble free operation of the crop protection
sprayer is only ensured with optimal filtration
of the spraying mixture. Appropriate filtering
considerably influences the treatment success
of the crop protection measure.
Pay attention to the permissible filter combina -
tions or mesh widths. The mesh widths of self-
cleaning pressure filters and nozzle filters must
always be smaller than the nozzle opening of
the nozzles used.
Please note that the use of pressure filter ele -
ments with 80 or 100 meshes/inch may with
some crop protection agents cause the separa-
tion of biocatalysts.
If in doubt, contact the crop protection product
manufacturer.
Pressure filter
The pressure filter prevents contaminants from
entering into the nozzle line. Different degrees
of fineness are available to suit each application.
By standard the filter is fitted with a 80 mesh/
inch element.
In case of applications with liquid fertiliser or
when using bigger nozzles it is recommended
to use more coarse elements in order to keep
the pressure drop in the filter as low as possible.
The self-cleaning pressure filter prevents block -
ing of the nozzle filters in front of the spray
nozzles.
In circulation mode (sprayer main switch "off")
the inside surface of the pressure filter insert is
constantly flushed, and undissolved spraying
agent and dirt particles are caught in the dome
screen of the spraying mixture container when
the chemical is returned to the tank.
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