Great Plains Simba Flatliner 500 Operator Manual - Manual (Page 21)

21 Simba Flatliner 500
611-128M-ENG
2012-12-21
4. Adjustment / Operation
4.7 Operation
With the Simba Flatliner 500 mounted on
the tractor three-point linkage, lower the
machine until the foot of the leading tine
is resting on the ground. The trailing tines
should be 50 to 125mm clear of the ground,
depending on the width of the implement and
what the desired operating depth is to be.
Set the trailing tines by adjusting the length
of the toplink (A).
Once in work the operating depth of the
machine has to be controlled by the roll unit
or else it will attempt to go deeper. The roll
unit is set using the toplink (C).
The roll unit serves two functions; it conserves
soil moisture, breaking up any clods left by
the tines and limits the operating depth of the
machine. The pressure that may be exerted
upon the clods by the roll is limited by the
weight of the implement and the downward
tine thrust. This downward thrust can be
increased by fitting wider wings, or slightly
increasing the angle of the points and wings
(shortening the toplink - A), and by minimising
any draft control setting on the tractor. This
is the first area to be investigated, if more
crumbler pressure should be required. Draft
control can also inhibit initial penetration
if the implement is lowered too quickly on
the move into work. The rapid increase in
draft is sensed by the tractor, which then
inhibits further penetration. The solution is
to gradually lead the implement into work,
thereby not imposing a rapid increase in
pulling force.
In most cases where a significant roll
pressure is required it is advisable to
eliminate draft control if possible.
The Simba Flatliner 500 must run reasonably
level or slightly nose down to achieve
consistant results across its width and any
increase in downward thrust will significantly
increase the pull required.
Fig. 4.06: Simba Flatliner Operation