Great Plains 8-10m Press Range SN 11999-12005 - Manual (Page 25)

25 8-10m Press Range
Operating Instructions
4. Adjustment / Operation
4.7.1 General Instructions For
All Machine Variations
„ When carrying out a headland turn
reduce forward speed and operate the
tilt hydraulics to ensure all ground
engaging elements are out of work and
clear of the ground with all weight being
carried on the rear roll.
„ Depending on field conditions (type of
soil, surface trash) it is possible to
operate the UniPress, X-Press and
CultiPress with a forward speed up to
14km/h
„ X-Press Version only. When levelling
boards are fitted it is not possible to
adjust both the levelling board rake
angle and disc angle whilst moving.
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 Press should be run with the chassis level
by extending the tilt cylinder to the necessary
position and adding shims as appropriate. In
practice it is possible to use the Press 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 Press.
Generally a forward speed of 5-9 mph (8-14
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.
In normal operation the machine should be
drawn onto the tilt cylinder shims, however, it
is permissibleto operate the tiltcircuit in float
in order to allow the implement to follow
contours as the tractor drawbar drops (eg.
over the brow of a hill).
General Rules when Setting
the X-Press
„ The lighter the land conditions the less
the disc angle required and the forward
speed can be increased.
„ The wetter the land conditions the less
the disc angle required and the forward
speed will need to be decreased.
„ Heavier land will require more of a disc
angle and a slower forward speed.
„ The more the trash the less the angle
on the discs and forward speed will
have to be decreased.
„ On ploughed land reduce the disc angle
to give a cutting/chopping action.
„ In hard conditions increase the disc
angle to increase penetration.