Great Plains 3PYPA Operator Manual - Manual (Page 25)

Great Plains Manufacturing, Inc. Table of Contents Index Preparation and Setup 21
03/20/2012 Table of Contents Index 401-647M
Frame Height and Leveling
All frame sections must be at the correct height and level
to maintain even planting depth.
Periodic frame-leveling adjustments should not be nec-
essary unless the depth control stop has changed since
last leveling. If you are having problems with uneven
depth, check planter levelness and follow these proce-
dures.
1. Complete the steps under “Bleeding Hydraulics” on
page 113, before proceeding.
2. Before first use, and as necessary thereafter, com-
plete or check:
“Center Section Leveling” on page 162,
“Wing Leveling” on page 162, and
“Hydraulic Down Pressure Calibration (Option)”
on page 165.
3. Unfold the planter fully. “Unfolding the 3PYPA
Planter” on page 33.
Set Initial Planter Height
Refer to Figure 12
The planter is designed to operate with the main tool bar
26in (66cm) above the planting surface (level ground or
bed peaks).
Note: Tractor 3-point control must be in Depth Control
mode, and not Draft Control mode.
When lowering the planter for the first time on the plant-
ing ground:
4. Completely lower the 3-point.
5. Completely lower the Lift Assist. If necessary, first
raise lift off transport locks, remove and stow locks.
6. Raise the 3-point until the tool bar is 26in above the
planting surface.
7. Set the cab 3-point lever stop to capture this “low-
ered” height.
On beds, it will further be necessary to use customer-
supplied blocks to raise the down-stop position of the lift
assist cylinders. One way to accomplish this is:
Refer to Figure 13
8.
Place a carpenter’s level on a side tube of the center
frame (pointed to in Figure 10). Have an assistant
stand a safe distance away and observe it.
9. With the 3-point lowered to the 26in stop, incremen-
tally raise the lift assist until the frame is level.
10. Check that the front tool bar is at 26in above planting
surface. If not, adjust stop and repeat step 9.
11. Measure the length of exposed rod on the lift cylin-
ders. Provision two (sets of) blocks in that length (or
stacked to that length).
12. Fully raise the lift assist and insert the blocks.
Null4:
Figure 12
Setting Hitch/Center Height
25435
Planting Depth/Uniformity Risk:
Level frame in planting conditions. Failure to do so may result
in machinery not producing desired results.
Null4:
Figure 13
Leveling on Beds
29193