Great Plains 3SF45 Operator Manual - Manual (Page 36)

4/8/99 6-4
170-062M
PLANTING DEPTH ADJUSTMENTS
LEVELING THE DRILL
This is a general dimension and may vary with the spring
down-float you require for different soil conditions and
planting depths see “
Press Wheel - Opener Depth Ad-
justments ” on page 6-2. If you require more downward
float of your openers you may want to increase this di-
mension. Keep in mind when this dimension is increased
your upward motion is decreased, limiting the vertical
travel of the openers for running over rocks and other for-
eign objects.
CAUTION!
IF YOUR OPENERS’
VERTICAL TRAVEL IS DECREASED, CON-
SIDERABLE DAMAGE WILL OCCUR TO
YOUR OPENERS.
If all the spring rods along the drill extend the same dis-
tance above their castings, the drill is level and you should
tighten down the threaded studs on the gauge wheel cyl-
inder. If the spring rod extensions vary in length, the drill
can be leveled with transport wheel and gauge wheel ad-
justments see "Pull Bar Adjustments" on page 6-5.
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 adjustments may
have to be fined tuned after observing the drill in the
field in actual planting conditions.
!
NOTE: Complete preparations steps 1 through 6 on
page 2-1 before proceeding with this section.
NOTE: This section describes procedures for leveling the
drill on it’s initial setup. This should be a onetime adjust-
ment and will not be adjusted in day to day operation. If
while using the drill, it appears to be lifting or planting un-
even, 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 2-3. Second, 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.
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-float on the disk openers and
press wheels. A level drill will have equal opener down-
float 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, Fig. 26.
Opener Spring Rods
Fig. 26
10548