Great Plains P13306 User Manual

Page 28

Solo

Operating Instructions

4. Adjustment / Operation

4.11 Depth Control

Working depth can be set by mid or rear roll
and/or by transport wheels. Under normal
conditions the weight of the machine will be
carried on the roll and the drawbar of the
tractor, with the main lift wheels either fully up
or floating. Depth is set using the depth
control cylinders situated on the roll unit with
shims added and removed as appropriate.
The front to rear pitch of the machine should
be adjusted as appropriate to compensate
for changes in working depth by adjusting the
amount of shims on the drawbar cylinder.
Some conditions or finished effects may
dictate that depth control is carried out using
both the roll and the lift wheels.

With a Mid Roll / Rear Roll

Use roll depth adjuster/hydraulic cylinder to
set machine working depth - ensure wheels
are lifted clear of or just touching soil. Use
shims on drawbar cylinders to set chassis
pitch level. Machine can be run in float to
contour follow.

With the Transport Wheels

Use shims on lift cylinders to set machine
depth and shims on drawbar cylinders for
pitch. Balance the weight on wheels and roll
if they are to be used together for depth
control.

Yellow

20mm

Silver

51mm

Roll Depth

Black

29mm

Tines

Pro-Lift

Terra-Grip