Great Plains
| 401-647M | 2019-06-11
Table of Contents
Index
62
3PYPA
Table of Contents
Index
Adjustments
Gauge Wheel Adjustments
The gauge wheels, which may also be contact drive
wheels, serve three functions:
Refer to Figure 72
1. Regardless of meter drive type, the gauge wheels
each establish the heights of their respective wings.
A spring-loaded yoke
assembly provides some
flexibility over rocks and uneven ground. See
“
Gauge Wheel Tension
” to set this spring.
2. In ground-drive (contact-drive), the gauge wheels
mutually contribute drive power for the row unit
mechanisms.
3. In ground-drive, the gauge wheels control the
planting rate at the meters, via three sprocket setup
positions. See “
Setting Material Rates
” on page 60.
Gauge Wheel Tension
Refer to Figure 73
Before performing this step, the planter center section
and wings must be level and aligned, and the tool bar
height must be set to 26 inches. If these steps have not
been performed, See “
Frame Height and Leveling
” on
page 22 and “
Planter Leveling
” on page 168.
As the gauge wheel tire wears, this adjustment may
need periodic attention.
The planter must be on firm, level ground for this step
(which may be performed when the planter leveling is
done). The planter must be unfolded.
1. Raise the planter so that the gauge wheels are just
off the ground.
2. Loosen the top nut
above the yoke block
.
3. Raise or lower the planter so that the base of the tool
bar is 26 inches from the ground.
4. Using an open-end or adjustable wrench at the
integral hex nut
of the adjustment link
, rotate
the link until the spring is just touching the yoke
block
, with neither gap nor compression.
5. Tighten the top nut
.
Ground Drive Adjustments
When planting, if the monitor indicates under-seeding,
check for slippage of the gauge wheels. If they are
slipping:
1. Raise the planter so that the gauge wheels are just
off the ground.
Refer to Figure 73
2. Loosen the top nut
above the yoke block
.
3. Using an open-end or adjustable wrench at the
integral hex nut
of the adjustment link
, rotate
the link to adjust the gauge wheel tension. Using the
base of the link flange, and the pivot zerk
as
reference points, increase this distance to increase
down-force on the wheel.
4. Tighten the top nut
.
Figure 72
Hydraulic Drive Gauge Wheel
25434
8
8
Figure 73
Adjusting Gauge Wheel Tension
25258
5
7
9
8
6
5
6
7
8
6
5
5
6
7
8
9
5
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