Great Plains 3PYPA Operator Manual - Manual (Page 63)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 59
03/20/2012 Table of Contents Index 401-647M
Gauge Wheel Adjustments
The gauge wheels, which may also be contact drive
wheels, serve three functions:
Refer to Figure 68
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 plant-
ing rate at the meters, via three sprocket setup posi-
tions. See “Setting Material Rates” on page 57.
Gauge Wheel Tension
Refer to Figure 69
Before performing this step, the 3PYPA planter center
section and wings must be level and aligned, and the tool
bar height must be set to 26in. If these steps have not
been performed, See “Frame Height and Leveling” on
page 21 and “Planter Leveling” on page 162.
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 26in from the ground.
4. Using an open-end or adjustable wrench at the inte-
gral 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 slip-
ping:
1. Raise the planter so that the gauge wheels are just
off the ground.
Refer to Figure 69
2.
Loosen the top nut above the yoke block .
3. Using an open-end or adjustable wrench at the inte-
gral 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 grease zerk
as reference points, increase this distance to
increase down-force on the wheel.
4. Tighten the top nut .
Null4:
Figure 68
Hydraulic Drive Gauge Wheel
25434
8
8
Null4:
Figure 69
Adjusting Gauge Wheel Tension
25258
5
7
9
8
6
5 6
7 8
6
5
5 6
7 8
9
5