Great Plains YP825A3P Operator Manual - Manual (Page 49)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 45
2013-05-28 Table of Contents Index 401-652M
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 26 inch.
Refer to Figure 36
There are two adjustments for this at the gauge wheels.
• Gauge wheel yoke spring length :
This provides a variable height reduction of up to
2.2 inch (5.6 cm).
• Axle hole change :
This provides a 2 inch (5.1 cm) height reduction.
Making both adjustments provides up to 4.2 inch
(10.7 cm) of tool bar height reduction.
Yoke Spring Adjustment
Refer to Figure 37
Check the length of all springs before adjusting.
The maximum (and factory set) spring length is:
3.0 inch (7.6 cm)
The minimum spring length is:
2
3 ⁄
8
inch (6.0 cm)
Each
1 ⁄
8
inch of spring compression raises the wheel by
approximately 0.44 inch (3.5 mm per 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 the 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 2 inch (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 36
Gauge Wheel Height
31054
1
2
1
2
3
3
3
Figure 37
Gauge Wheel Spring Length
31053
3
4
5
4
5
2