Great Plains YP825A3P Operator Manual - Manual (Page 22)

18 YP4-6-825A3P Table of Contents Index Great Plains Manufacturing, Inc.
401-652M Table of Contents Index 2013-05-28
Leveling Planter
For row units to function correctly, planter must be:
• level from side to side,
• level from front to back, and;
• at correct tool bar height.
Perform this setup on level ground in representative field
conditions.
Refer to Figure 10
1. Raise planter so that gauge wheels are just off
ground.
2. At each gauge wheel, measure the pre-compressed,
no-load length of the yoke spring
.
All axles should be in the same (upper or lower) arm
holes. All springs should have this same length. Note
this length for step 9.
See page 45 for factory setting, and adjustments for
local conditions.
3. Check tire pressures of gauge wheels. As
necessary, inflate to specifications (page 102).
Refer to Figure 11
4. Measure height from bottom of main tool bar to
ground, at each end. If this dimension differs by
more than
1 ⁄
2
inch (6.4 mm) at each end, adjust
lower links of tractor to level side-to-side.
Note the current height for step 7, and what lowering
would be required to make that 26 inch (66 cm).
5. Check front-to-back level at top of main tool bar. If
unlevel, adjust top of tractor three-point to level.
6. Pull forward slowly, and lower the planter to
approximately 26 inch (66 cm). Stop the tractor and
set the parking brake.
7. Check the tool bar height . Adjust the hitch height
until it is 26 inch. If available, set a hitch stop control
to capture this height.
8. Check that the row units are running level with the
ground.
9. Check that the gauge wheels are all in solid ground
contact, tires slightly compressed, and that the
springs are slightly compressed from the length
checked at step 2.
Hitch configuration during planting can vary between
tractor models, and due to field conditions. Great Plains
recommends starting with the hitch set to Float or
Position/Depth Control (and not Load or Draft Control).
Figure 10
Gauge Wheel Yoke
31053
1
1
Figure 11
Tool Bar Height and Leveling
31051
2
2
2