Great Plains 3SF45 Operator Manual - Manual (Page 35)

4/8/99
6-3
170-062M
PLANTING DEPTH ADJUSTMENTS
CENTER BOX GAUGE WHEEL HYDRAULIC DEPTH CONTROL ADJUSTMENT
With the top 3-point flex link of the drill in the locked posi-
tion, the amount the drill is lowered will determine the
amount of down float in the openers. This is indicated by
the amount of spring rod sticking above the spring rod
casting when the drill is lowered. Ideally this is about 2".
The boxes should be level front to back.
This can be controlled by the depth stop located on the
master cylinder in front of the drill box at the gauge wheel,
Fig. 25.
NOTE: This DOES NOT control opener depth, seeding
depth is set with the press wheel adjustment. Refer to
page 6-2 for opener depth adjustments.
The hydraulic depth control allows for variable adjustment
from zero to maximum stroke which controls the height of
your drill boxes in the planting position. The ideal height of
the boxes is 16" from the bottom of the opener mounting
tube to the ground.
To use the depth stop, lower the drill until the bottom of the
opener mounting tube is 16" off the ground. Next loosen
and slide the depth control activator plate up the cylinder
rod as far as possible to where it completely depresses
the plunger on the shut off valve. Secure the stop clamp
at that position. The drill will stop at this height each time
it is lowered.
If the wing boxes stop at a higher or lower position than
the center, refer to " Bleeding The Lifting Hydraulics "
on page 2-4.
NOTE: Different field conditions may require this stop to
be readjusted.
IMPORTANT: Be sure to check the clutch drive activa-
tors for correct adjustments after hydraulic depth stops
are adjusted.
Master Cylinder Depth Control Stop
Fig. 25
11803