Great Plains 3N-3020P Operator Manual - Manual (Page 23)

4/23/2010 196-248M
21 Preparation and Setup
3. Reactivate tractor hydraulic valve until oil
seeps out around another loosened fitting.
Tighten that fitting. Repeat process until all
loosened fittings have been bled and tight-
ened.
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 19, before proceeding.
Refer to Figure 3
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.
19119
Figure 3
Frame Leveling