Great Plains 3N-4020 Operator Manual - Manual (Page 91)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 87
2013-10-29 Table of Contents Index 196-359M
Refer to Figure 134
To adjust side gauge wheels:
1. Raise planter slightly removing weight from side
gauge wheels.
2. Loosen hex-head bolt
➀
. Move wheel and arm out
on o-ring bushing.
3. Loosen pivot bolt
➁
. Turn hex adjuster
➂
so indica-
tor notch
➃
is at 5 o’clock to 7 o’clock.
Note: Use this as the starting point for adjustment.
4. Move wheel arm in so side gauge wheel contacts
row unit disk. Tighten hex-head bolt
➀
to clamp arm
around bushing and shank.
5. Check wheel-to-disk contact at 2in planting depth.
Lift wheel 2in and release. When let go, wheel
should fall freely.
• If wheel does not contact disk at bottom to area where
blade leaves contact with soil, move hex adjuster until
wheel is angled for proper contact with disk.
• If wheel does not fall freely, loosen hex-head bolt
➀
and slide wheel arm out just until wheel and arm move
freely. Retighten hex-head bolt
➀
per grade:
1 ⁄
2
in Grade 5 bolt, 75 ft-lbs.
1 ⁄
2
in Grade 8 bolt, 110 ft-lbs.
6. Keep turning hex adjuster and moving wheel arm
until the wheel is adjusted properly. When satisfied,
tighten pivot bolt
➁
to 110 ft-lbs.
Note: Use “Torque Values Chart” on page 126 for refer-
ence.
Figure 133: 20 Series:
Opener-Gauge Wheel Contact
22531
Contact Within this Area
Figure 134: 20 Series:
Disk/Gauge Wheel Adjustment
22524
22525
Starting Point
➂
➁
➀
➃