Great Plains Simba UniPress Operator Manual - Manual (Page 27)

27 Simba UniPress
607-114M-ENG
2013-01-25
4. Adjustment / Operation
General Rules when Setting
the Simba UniPress
• Run slightly tail low to give increased
clod cutting and consolidation in
harder conditions.
• In trashy conditions the use of the
levelling board may be limited due to
raking trash.
• Increase the rake angle of the levelling
board in spring time operation to carry
more soil for levelling.
• Reduce rake angle on levelling board
to hold soil and rub clod against clod in
harder conditions. This will also align
clods with the DD rings facilitating
better cutting.
The boards need to carry a certain amount
of soil to effect a levelling operation and also
to give a clod to clod crushing action.
When reversing the Simba UniPress into
corners when working headlands ensure
that the levelling boards are fully raised
and the machine tilted onto the roll rings far
enough to allow the lower ends of the sprung
leaves to clear the ground.
4.6 Pitch Control
Pitch control on the Simba UniPress is
governed by the quantity of shims fitted to
the depth stops attached to the drawbar
cylinders. Increasing the number of shims
will lift the front of the chassis when lowered
into the work position.
Running the machine level allows the press
rings to give an even consolidation and clod
crushing action, with the sprung leaves of
the levelling board aiding the clod crushing
action, aligning the clods for the roll rings.
Running the machine significantly nose
down or raised will reduce the load on the
rear axle leading to loss of drive of the axle
and then blockage, together with a reduced
consolidation effect.
If any roll axle starts to block regularly, this
is generally an indication that the roll axle
is not tight. Failure to keep the axles tight
results in loss of drive between each pair of
rings allowing rings to turn individually on
the axle. Should this occur the axle must be
tightened immediately to prevent any dam-
age occurring to the axle shaft.
If the roll axles start to block regularly this
may also be an indication that the ground
conditions are too wet for the Simba Uni-
Press to be effective.
In practice it is possible to use the UniPress
on ground conditions that are unsuitable to
achieve the desired effect, and it is usually
possible to operate the machine without
regular blockage under such unsuitable
conditions, assuming that the axles are tight
and rings smooth.
As such, especially under wet conditions,
it is advisable to check on the cultivation
effect of the machine. Often the use of the
press 12 - 24 hours after the disc or longer
following the plough gives a far superior
surface consolidation effect.