Great Plains P12720 - Manual (Page 24)

X-Press
Operating Instructions
24
4.2 Disc Units
The X-Press features two gangs of discs
(500mm in diameter) 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 an individual arm linked
to a track rod system. Gang angles can
therefore be varied with ease and accuracy
using a graduated turnbuckle.
Adjustable angling of the discs (between 10°-
25°) ensures penetration and stubble mixing
4. Adjustment / Operation
are achieved in one pass. Working depth can
also be varied simply via shimmed manual
adjusters or hydraulic cylinders. All this is
achieved without compromise to
consolidation.
All disc arms are shear bolt protected so they
break back if they meet obstructions. X-
Presses can also be fitted with a cushion
hydraulic system on the disc frames which
offers further protection against damage.
Wings float and reset themselves on stony or
uneven conditions.
The leading blade on each side of the
machine is 450mm (18“) to reduce soil throw
on to worked ground from previous pass.
The centre disc unit can be adjusted
independantly of all other disc units to ensure
a level finish across the machine width.
Fig. 4.02: Disc Frame (inset showing centre disc unit)