Great Plains YP925TD Operator Manual - Manual (Page 53)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 49
02/23/2011 Table of Contents Index 401-755M
Gauge Wheel Adjustments
The minimum tool bar height is limited by the gauge
wheels. In some conditions, such as ridge planting, you
may need to use a tool bar height lower than 26in.
Refer to Figure 39
There are three adjustments for this at the gauge wheels.
1. Gauge wheel yoke spring length: This provides a
variable height reduction of up to 5.6 cm.
2. Axle hole change: This provides a 5.1 cm height
reduction.
3. Spring yoke mounting hole: This adjustment
provides an 18 cm change and is intended for
switching between bedded and flat ground planting.
See page 123 for details.
Making adjustments 1 and 2 provides up to 10.7 cm of
tool bar height reduction.
Yoke Spring Adjustment
Refer to Figure 40
Check the length
of all springs before adjusting.
The maximum (and factory set) spring length is:
7.6 cm
The minimum spring length is:
6.0 cm
Each 1 mm of spring compression raises the wheel by
approximately 3.5 mm.
To adjust the spring length:
1. Raise the planter until the gauge wheels are slightly
off the ground. Place blocks or jack stands under the
frame for safety.
Note: If there is weight on the wheels, the springs may
have additional compression and may not be at a
length you can usefully measure.
2. Loosen the jam nut .
3. Rotate the adjuster nut to set new spring length.
4. Tighten the jam nut.
Wheel Axle Adjustment
If the target tool bar height cannot be achieved with the
spring adjustment, relocate the wheel axles in the arms.
This lowers the planter by about 5.1 cm.
1. Raise the planter until the gauge wheels are slightly
off the ground. Place blocks or jack stands under the
frame for safety.
2. Remove bolts , located in lower holes, securing
transport ground tire assembly to unit.
3. Move wheel assembly and secure assembly to upper
hole using previously removed bolt.
Figure 39
Gauge Wheel Height
31942
1
2
3
4
4
4
ll
Figure 40
Gauge Wheel Spring Length
31053
4
5
6
5
6
2