Great Plains 2SNG30 Operator Manual - Manual (Page 23)

8/17/2006 202-499m
21 Leveling the Drill
Note: This section describes procedures for level-
ing the drill on its initial setup. This should be a
one-time adjustment and will not be needed dur-
ing day-to-day operation. If while using the drill, it
appears to be lifting or planting uneven, check the
following before re-leveling the drill. First, make
sure the tongue is running level to the ground
while running in the field. Be sure to check this if
the drill has been switched to a different tractor.
See "Tractor Draw Bar Hook-Up," page 17. Sec-
ond, check the lift cylinders. Be sure they are
properly bled, are operating correctly, and do not
have internal oil leaks before using this section to
re-level the drill.
Refer to Figure 7
The opener spring rods located along the back of
the drill boxes are indicators of the level of the drill
because they show the amount of down-pressure
exerted on the disk openers and press wheels. A
level drill will have equal opener down-pressure
from end to end. Check the spring rod cross bolts
at the top of the spring rods to see that they are all
extended about 2 inches above their spring rod
castings, . This is a general dimension and may
vary with the spring down-pressure you require
for different soil conditions and planting depths
(See “Press Wheel Depth Adjustments,” page
28). If you require more downward float of your
openers you may want to increase this dimension.
Keep in mind when this dimension is increased
your upward motion is decreased, limiting the ver-
tical travel of the openers for running over rocks
and other foreign objects.
!
CAUTION
If your openers’ vertical travel is decreased, consider-
able damage will occur to your openers.
If all the spring rods along the drill extend the
same distance above their castings, the drill is lev-
el and you should tighten down the threaded
studs as described in "Transport Wheel Adjust-
ments for Leveling," page 22. If the spring-rod
extensions vary in length, the drill can be leveled
with transport wheel and gauge wheel adjust-
ments. These are described on page 22.
To summarize: After leveling your drill, it should
have the same dimension from the ground to the
box frame at both ends of each box. These adjust-
ments may have to be fined tuned after observing
the drill in the field in actual planting conditions.
Leveling the Drill
10548
Figure 7
Opener Spring Rods