Great Plains P18651C Operator Manual - Manual (Page 24)

SL700
Operating Instructions
24
1x
Silver
51mm
Transport Cylinders
(in road transport)
4.8 Starting Settings
This section details the recommended
starting settings for the SL700. These
settings can then be used as a base for
further adjustment in order to get the
optimum performance from your machine.
Ensure all settings from the left and right
hand sides of the machine match each other.
4.7 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
In normal operation a 51mm shim
should be left in place at all times except
in situations where an extremely low
transport height is required (ie when
transporting on a lorry). On machines
fitted with a following harrow no shims
are needed here.
4. Adjustment / Operation
machine without the front depth wheels
(in changeable conditions, for instance)
it should be hydraulically drawn onto the
drawbar shims.