Great Plains P17897B Operator Manual - Manual (Page 26)

X-Press
Operating Instructions
26
4.2 Disc Units
The X-Press features two rows of discs
which chop and mix the crop residue. A
disc spacing of 250mm ensures a fine tilth
and being arranged in a symmetrical format
around the centre line of the machine,
crabbing is eliminated, leaving the machine
to pull straight making the most efficient use
of the power available.
The discs fitted to the X-Press are 500mm
in diameter (20”) and 6mm thick. They are
manufactured from heat treated chrome
boron steel which ensures excellent wear
resistance and enhanced working life.
Each disc is mounted on a Pro-Active sprung
leaf linked to a track rod system. Gang
angles can be varied with ease and accuracy
using a graduated adjuster.
Fig. 4.02: Disc Frame
Adjustable angling of the discs (between
10°-25°) ensures penetration and stubble
mixing are achieved in one pass. Working
depth can be varied simply via shimmed
adjusters. All this is achieved without
compromise to consolidation.
A level, evenly cultivated finish is maintained
by adjusting the balance of soil throw
between the front and rear disc.
4. Adjustment / Operation
Sprung Pro-Active leaves offer protection
against damage as well as offering a degree
of contour following as they flex up and down
in work.
The centre disc unit can be adjusted
independently of all other disc units to
ensure a level finish across the machine
width.