Great Plains P14888 Serial No 18010000 - Manual (Page 21)

21 SL700
Operating Instructions
The SIMBA SL700 is an amalgamation of
time proven, successful Simba design
components brought together to form this
important development. The SL700 has been
designed and produced in conjunction with
the Simba ECOtillage
™
system to provide a
one pass mix with a fissured layer at disc
depth for through drainage and root access
to lower horizons. This enables rapid
drainage and access after rain, creating a
greater effective capacity for moisture
compared to ploughing for the same effective
total depth of cultivation.
In principle, the machine is an offset disc with
Terra-Grip tines, designed for low draft, high
speed operations. The addition of a levelling
board and rear mounted roll enables more
effective cultivation in one pass. The leading
set of disc blades cultivate the top horizon,
minimising clod formation and reducing tine
loadings and blockage. This starts the ‘top
down’ cultivation process, retaining
weathered tilth in the surface level for stale
seedbed purposes. The tines follow the disc
blades to shatter at depth retaining the
surface intact to work as an ECOtillage
™
stale seedbed. This eliminates the problem
of ‘wet years’ in non-plough based terms. The
key to the SL700’s success is the lower draft
tine point and wing which maintain shatter
across the full width of cultivation. The rear
roll then consolidates the surface, cracks any
clods and firms the soil profile after the rear
gang completes mixing to depth. The
corrugated top and shattered lower horizons
are left fully weatherproof to any conditions
between cultivation and drilling whilst retaining
moisture below the surface for rapid straw
breakdown and optimum establishment of the
next crop.
4. Adjustment / Operation
4.2 Depth Wheels
The depth wheel units support the front of the
machine helping to reduce the load on the
drawbar / rear of tractor in work and ensuring
a level soil finish.
Fig. 4.02: Depth Wheels