Great Plains P18651C Operator Manual - Manual (Page 22)

SL700
Operating Instructions
22
Fig. 4.03: Front Disc Gang
4.3 Disc Units
The SL700 features two rows of discs which
chop and mix the crop residue. A disc
spacing of 250mm ensures a fine tilth.
The discs fitted to the SL700 are 610mm
in diameter (24”) 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-Flex sprung
leaf linked to a track rod system. Gang
angles can be varied with ease and accuracy
using a graduated adjuster.
Adjustable angling of the discs (between
10°-25°) ensures penetration and stubble
mixing are achieved in one pass. 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.
Sprung Pro-Flex leaves offer protection
against damage as well as offering a degree
of contour following as they flex up and down
in work.
4.4 Spring Reset Tines
Spring reset tines have a robust, basic con-
struction and are suitable for all soil types.
The spring-loaded auto-reset system with
a 500kg trip force on each tine prevents
damage to the tines and tine brackets.
When the auto reset system is activated an
initial progressive phase holds the tine in
the ground in a steady position until the trip
point is reached. In the subsequent spring
compression phase the tine is raised gently
and rapidly to a maxmum height of 230mm.
The tines can be fitted with a selection of
points depending on application and have 6
depth settings in 25mm increments.
Fig. 4.04: Spring Reset Tines
4. Adjustment / Operation