Great Plains YP4425A Operator Manual - Manual (Page 24)

20 YP4425A Table of Contents Index Great Plains Manufacturing, Inc.
401-805M Table of Contents Index 2012-02-23
Heights 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. For problems with uneven depth, check
planter levelness and follow these procedures.
1. Before making any adjustments be sure the lift
cylinders are re-phased and operating properly. If
not, see “Re-Phasing Lift System” on page 27
2. Complete “Bleeding Hydraulics” on page 101.
3. Unfold the planter fully (page 23).
Set Tongue Height
Planter must be unfolded for this procedure.
Refer to Figure 11
Set the initial tongue height, using 3-point or hydraulic
tongue cylinder. Distance is measured at top of tongue to
ground level.
• For standard 3-point hitch:
Set depth stop to capture this working height.
If desired height cannot be attained with normal range
of hitch, swivel coupler weldment may be relocated in
tongue bolt holes.
Note: Tractor 3-point control must be in Depth Control
mode, and not Draft Control mode.
• For hydraulic tongue:
Note the scale reading on the tongue for this height.
[Re]set the tongue height to this value when planting.
Checking Planter Height
The planter is designed to operate with all sections of the
main tool bar nominally 26 inches (66 cm) above the
planting surface. The height of the center section is not
routinely adjustable. Set planting depth with row unit
adjustments.
When lowering the planter for the first time on the
planting ground:
1. Completely lower the main tool bar. If necessary, first
lift off transport locks, remove and stow locks.
2. Set hitch to planting height.
3. Pull forward a few feet or just over a meter.
Height Mis-adjustment Risk:
Fully lower planter to field position (with openers into ground)
and set hitch height before making side-to-side adjustments.
4. Check tool bar height across planter. See page 104
for further detail and adjustment.
Figure 11
Initial Tongue Height
34087
Note: Level frame in planting conditions.
Failure to do so may result in implement not
producing desired results.
41.5in
(105.4cm)
Figure 12
Center Level Check
29276