Great Plains SL600 Operator Manual - Manual (Page 27)

27 Simba SL
603-215M-ENG
2012-12-21
4.7 Adjusting Depth
To change the working depth it is advisable
to lift the machine clear of the ground so that
the rear roll linkage becomes loose. The
depth is changed by adding shims above
and below the collar on the depth control rod.
When the depth has been altered, lower the
machine into work and check operation. If
the depth change has been significant then
other settings could be affected. This could
be chassis pitch (front to rear) and disc angle
for the given depth.
On machines fitted with a bar coupler
drawbar the tractor link arms should be used
in conjunction with the rear roll to determine
working depth / pitch.
On machines fitted with a clevis type drawbar
the pitch and working depth are determined
using shims in the drawbar cylinder and the
rear roll depth control rods.
A small amount of cultivation, eg. a 20
metre run, should be carried out before
altering these settings to check whether
they are now suitable for the cultivation
effect required. These settings should be
addressed immediately to prevent too much
unsatisfactory work being carried out.
Fig. 4.05: Roll Linkage
DEPTH CONTROL ROD COLLAR
4. Adjustment / Operation
4.8 Using Shims
Before using shims to alter machine settings
ensure the machine is stationary and the
tractor is turned off with the keys out. Ensure
that all operators are clear of the machine
and that no load is being held on any existing
shims in the cylinder / depth control rod.
To fit the shims hold them by the handle and,
using a firm action, clip them onto the rod
as shown in Fig. 4.06. They are removed by
using a finger to pull firmly on the handle.
Check the cylinder / depth control
rod for damage and debris before
fitting shims.
Only attempt to add or remove
shims using the handle. Trying to
manipulate shims using the jaws
could result in injury.
When changing machine settings
ensure both sides of the machine
mirror each other. The left hand
cylinder should contain the same
amount of shims as the right, for
example. Failure to do this could
result in damage to the machine.
Fig. 4.06: Shims