Great Plains 2020P Operator Manual - Manual (Page 18)

2010P and 2020P
118-740M 4/23/2010
16
4. In addition, the following bushings (not sup-
plied by Great Plains) may be needed to fit
your quick hitch or tractor’s 3-point arms:
• Upper Link 1” ID X 1 1/4 OD
5. Be sure that all tractor 3-Point arms are se-
curely pinned before lifting the drill. Adjust the
top 3-Point link so that the top edge of the
boxes parallel with the ground.
6. DO NOT use the link to adjust the depth of
opener penetration. Three hitch pins are fur-
nished with each 3-Point Drill.
7. Set your tractor 3-Point draft control in the
float position.
8. Raise or lower tractor three-point arms as
needed and pin lower arms to drill.
9. Pin upper arm to drill. For category II and III,
III-N tractors, install hitch pin in the lower hole.
For category IV-N tractors, install hitch pin in
the upper hole.
10. Slowly raise drill. Watch for cab interference.
11. Adjust top three-point link so that top edge of
drill box is parallel with ground when drilling.
NOTE: Do not use link to adjust opener depth.
For opener adjustments, refer to page 25.
12. Set your tractor three-point-draft control to
float position.
13. Plug lead from drill light harness into tractor
receptacle.
Hydraulic Hose Hookup
Great Plains hydraulic hoses are color coded to
help you hookup hoses to your tractor outlets.
Hoses that go to the same remote valve are
marked with the same color.
To distinguish hoses on the same hydraulic cir-
cuit, refer to plastic hose holder. Hose under
extended-cylinder symbol feeds cylinder base
ends. Hose under retracted-cylinder symbol
feeds cylinder rod ends.
Color Hydraulic Function
Orange Marker Cylinders
Hydraulic Hose Label
17641
Plastic hose
label
Category III Hitch with Category III Pins