Great Plains YP925TD Operator Manual - Manual (Page 21)

Great Plains Manufacturing, Inc. Table of Contents Index Preparation and Setup 17
02/23/2011 Table of Contents Index 401-755M
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 6
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
.
Both axles and yokes should be in the same (upper
or lower) arm and mount holes. All springs should
have this same length. Note this length for step 9.
See page 49 for factory setting, and adjustments for
local conditions.
3. Check tire pressures of gauge wheels. As
necessary, inflate to specifications (page 106).
Refer to Figure 7
4.
Measure height from bottom of main tool bar to
ground, at each end. If this dimension differs by
more than 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 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 66 cm. Stop the tractor and set the
parking brake.
7. Check the tool bar height . Adjust the hitch height
until it is 66 cm. 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 hydraulic circuit 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 Control or
Draft Control).
Figure 6
Gauge Wheel Yoke
31053
1
1
Figure 7
Tool Bar Height and Leveling
31857
2
2
2