Great Plains 3PYP Operator Manual - Manual (Page 22)

18 3PYP Table of Contents Index Great Plains Manufacturing, Inc.
401-312M Table of Contents Index 2014-09-09
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
necessary unless the depth control stop has changed
since last leveling. If you are having problems with
uneven depth, check planter levelness and follow these
procedures.
1. Complete the steps under “Bleeding Hydraulics” on
page 100, before proceeding.
2. Before first use, and as necessary thereafter,
complete or check:
“Center Section Leveling” on page 157,
“Wing Leveling” on page 157, and
“Hydraulic Down Pressure Calibration” on
page 159.
3. Unfold the planter fully. See “Unfolding The 3PYP”
on page 28.
Set Initial Planter Height
The planter is designed to operate with the main tool bar
26 inches (66 cm) 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
planting 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 26 inches above
the planting surface.
7. Set the cab 3-point lever stop to capture this
“lowered” 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 11
8. Place a carpenter’s level on a side tube of the center
frame (pointed to in Figure 11). Have an assistant
stand a safe distance away and observe it.
9. With the 3-point lowered to the 26 inch stop,
incrementally raise the lift assist until the frame is
level.
10. Check that the front tool bar is at 26 inches above
planting surface. If not, adjust stop and repeat
step 9.
11. Measure the length of exposed rod on the lift
cylinders. Provision two (sets of) blocks in that length
(or stacked to that length).
12. Fully raise the lift assist and insert the blocks.
Note: Older planters with rephasing cylinders need to
have the cylinder rephrased as the first step. See
page 165.
Note: Level frame in planting conditions.
Failure to do so may result in machinery not
producing desired results.
Figure 10
Setting Hitch/Center Height
25435
Figure 11
Leveling on Beds
29193