Great Plains Uni-Press - Manual (Page 14)

5. OPERATION
In work the wing cylinders should be fully extended and the chassis horizontal front to rear.
The gangs are able to float over any undulations on the ground due to their floating frames.
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 Uni-press should be run with the chassis level front to rear by extending the drawbar
cylinders to the necessary position. In practice it is possible to use the Uni-press on ground
conditions that are unsuitable to achieve the desired effect, and it is usually possible to
operate the press 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 disc and Uni-press combination.
When the Uni-press is used tilted onto the rear row of rings (on machines configured with
two rows of rings) for increased consolidation/ clod breaking action the loading on the disc
harrow drawbar is increased. This will cause the rear of the disc to dig deeper moving the
rear gang to the right. Shortening the disc harrow levelling springs should allow the disc
harrow to pull straight again.
It is not necessary to tilt the Uni-press onto the transport wheels during headland turns
whether the machine is used independently or in tandem with a disc harrow.
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