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Adjusting the plough
Working width -
Variomat
Working width
On ploughs with an infinitely variable working width - Variomat - is ad
-
justed as follows:
Mechanical
In place of the cylinder (A), this model has a turnbuckle. The infinitely
variable ploughing width is set by changing the length of the turnbuck
-
le. Shortening the turnbuckle produces a greater working width.
The first furrow must be set separately.
Hydraulic
The working width is set by adjusting the length on the cylinder (A).
Shortening the cylinder produces a greater working width.
The first furrow must be set separately.
Hydraulic, with memory
The working width is set by adjusting the length on the cylinder (A).
Shortening the cylinder produces a greater working width. When turn
-
ing, the plough will be automatically retracted to the smallest working
width and return to the set working width after the plough has turned.
The first furrow must be set separately.
Hydraulics with memory including first furrow
Setting of the working width and turning is as described above.
Ploughs equipped with this type of hydraulics also have hydraulic set
-
ting of the first furrow. This is coupled to the Variomat cylinder (A) and
the width of the first furrow will be changed along with the rest of the
plough.
The furrow width is set using the Variomat cylinder (A). This cylinder
is a master cylinder which is coupled to and controls the inner (small
-
est) section of the telescopic cylinder, which is a slave cylinder (C).
The outer (largest) section acts as a side adjustment cylinder and de
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termines the width of the first furrow. The telescopic cylinder can be
fitted in two different positions according to the tractor's track width.
Return position for the plough's furrow width adjustment (i.e.
synchronisation of the master (A) and slave cylinder (C))
The piston in cylinder (A) and slave cylinder (C) is equipped with an
overflow valve. The plough is returned by these cylinders being moved
to the inner position (largest furrow width), and maintained under a
constant supply of oil for a short while.
This figure shows hydraulic
working width adjustment
Working width (A)
Stop nut
A
C