BAG0172.7 02.20
6.1 Turning with double-acting automatic cylinder
The double-acting automatic cylinder is equipped
with automatic reversing and hydraulic end
position locking. This requires double-acting
control unit on the tractor.
The double-act
ing automatic cylinder can also be
connected to a single-acting control unit, but this
requires an oil return line to the oil tank of the
tractor.
Connection to a double-acting control unit:
N = Neutral
Cylinder is hydraulically locked (drop
locking)
D = Turning
Turning is always in position D no matter
whether turning left or right
N = Reverse turning
If the plough is stopped during the turning
procedure (switch position from D to N), it
can be turned back in position R
From neutral position to turning position = plough
turns by 180°
Then back to neutral position = plough locked.
Next turn possible after 5 seconds.
If lever is briefly set to R and then switched to D,
turning takes place immediately.
If the turning procedure is interrupted while
turning, e.g. after 15 - 20°, the plough can be
switched back in lever position R.
Turning the plough in combination with hydraulic beam pivoting
If the gap between the plough and the ground is too small and the
plough or the support wheel collides with the ground during turning,
the plough must be equipped with a hydraulic frame in-swing
mechanism.
Instead of using the mechanical tension jack to adjust the traction
point, a double-action hydraulic cylinder is used. This cylinder is
hydraulically connected to the turning cylinder on the headstock of
the turning gear. (There is no need for an additional control unit on
the tractor.)
During the turning procedure, the plough beam is automatically
swung in (narrow) and back out to the set cutting width. To swing the
frame in hydraulically, the turning cylinder must be equipped with a
double valve block.
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