Great Plains 3N-4025P Operator Manual - Manual (Page 21)

4/23/2010 196-286M
19 Preparation and Setup
Leveling Frame Side-to-Side
All frame sections must be level to maintain even
seeding depth. Before using the drill in the field,
follow these steps to make sure the drill is level
side-to-side.
Periodic frame-leveling adjustments should not
be necessary, but if you are having problems with
uneven depth, check drill levelness and follow
these procedures.
Complete the steps under “Bleeding Fold Hydrau-
lics,” page 17, before proceeding.
Refer to Figure 5
1. Locate the threaded eye bolt at the base end
of the gauge-wheel cylinders. The eye bolt is
locked in place by a jam nut. Observe the
amount of thread exposed above the upper
nut and below the lower nut. If the exposed
threads are roughly equal, no initial adjust-
ment is needed. Go to step 3.
2. If the exposed threads above and below the
nuts are not equal, loosen and adjust the jam
nuts until the amount of exposed thread is
about the same above and below. Repeat for
other end of drill.
3. Move the drill to a level area. With the drill un-
folded, raise the drill to its highest position
with the lift cylinders. With the tractor idling,
rephase the cylinders by holding the hydraulic
lever on for an additional 30 seconds. Imme-
diately lower the boxes until the coulters and
openers are just ready to touch the ground.
4. Move the gauge-wheel eye bolts until the
openers on the outside end of the drill are the
same height as the center openers.
NOTE: Eye-bolt adjustments are easier if the
drill is first lowered to the ground to remove
some of the force on the cylinders.
5. Repeat the steps above until the drill is level
end-to-end when drilling in actual seeding
conditions.
Leveling Frame Front-to-Rear
Level the drill front-to-rear with eye bolts located
on the rear axle only.
1. Repeat the above steps using the rear cylin-
ders only until the drill is level front-to-rear
when drilling in actual seeding conditions.
Note: When drill is level, opener bodies will be
level or slightly higher at rear.
20316
Figure 5
Frame Leveling
Note: Drill must be level front to rear in actual
planting use or row plugging will occur. Ad-
justing gauge wheel depth stop too low or ex-
cess opener spring force can cause the front of
drill to roll forward when planting. Convention-
al till ground can also cause drill to run low in
the front if gauge wheel depth is set too low.
Have an assistant check front to rear level while
planting by observing the drill from a safe distance.
Drill should run with box and frame level or slightly
lower in the front.