Great Plains P14889 Serial No 18007975 - Manual (Page 23)

23 Simba SL
Operating Instructions
4. Adjustment / Operation
Fig. 4.06: DD Light Roll
4.4 DD Light Roller
The DD Light roller is made up of individual
Double Disc (patented) Ring segments.
The DD Light roll is designed to consolidate
the soil whilst cutting and crushing any clods.
Even in heavy, wet soils it can easily be
operated with minimal blockages occurring.
The rear DD Light roller carries a proportion
of the machine’s weight to ensure
consolidation. It also regulates the depth of
the disc units. The corrugated surface left by
the roller is weatherproof both for wet or dry
situations.
4.5 Work Settings
Optimum performance has been found to be
achieved when the DD Light roll rings have
worn away the painted finish leaving a smooth
shiny surface. When the DD Light rings are
new or rusty, soil may tend to pick up on the
surface and blockage may occur, this will
reduce when the rings are shiny again.
The SL should be run with the chassis level to
slightly tail low. In practice it is possible to use
the SL on ground conditions that are
unsuitable to achieve the desired effect, and
it is usually possible to operate the DD Light
roll without regular blockage under such
unsuitable conditions, assuming that the roll
assemblies are tight, the scrapers correctly
adjusted and rings smooth. As such,
especially under wet conditions, it is advisable
to check on the cultivation effect of the SL.
The SL should be lifted fully clear of the ground
on the transport wheels for all headland turns.
Turning with the disc units or roller on the
ground could lead to damage of these
components.
In work, the tractor link arms should be used
in conjunction with the rear roll to determine
working depth / pitch.