Great Plains P14888 Serial No 18010000 - Manual (Page 24)

SL700
Operating Instructions
24
4. Adjustment / Operation
4.6 Work Settings
In work the wing cylinders should be fully
extended. A simple pressurised hydraulic
circuit automatically sets itself as the wings
are unfolded.
Optimum performance has been found to be
achieved when the press roll rings have worn
away the painted finish leaving a smooth shiny
surface. When the press roll 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 SL700 should be run with the chassis
level. In normal operation the machine should
be carried between the rear roll and front
depth wheels with the lift circuit in float. In
practice it is possible to use the SL700 on
ground conditions that are unsuitable to
achieve the desired effect, and it is usually
possible to operate 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 SL700.
Generally a forward speed of 5-7 mph (8-11
kph) will achieve optimum results, maximising
inversion and burial. Speeds in excess of
those stated above will tend to give a
deterioration in the quality of the work. This
may be seen as a ridge and trough effect
across the work surface due to soil being
thrown too far by the leading discs, the rear
discs then are unable to turn enough soil back.
It may occasionally be useful to almost fill the
drawbar cylinder with shims to allow the
drawbar to momentarily take the weight if the
front wheels pass over any low/soft areas in
the soil profile while maintaining forward
speed and traction. If using the machine
without the front depth wheels (in changeable
conditions, for instance) it should be
hydraulically drawn onto the drawbar shims.