Great Plains 3S-3000F Operator Manual v2 - Manual (Page 31)

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Section 2 Operating Instructions
11/9/07 3S-3000 Three-Section Folding Drill 195-110M-A
Great Plains Mfg., Inc.
4. Each time the openers are lowered, hold the tractor
remote hydraulic lever forward for a few seconds to re-
charge the circuit, then return it to its neutral position.
The tractor and drill should be on level ground when
you return the tractor lever to neutral.
5. The open center hydraulic kit allows the tractor opera-
tor to momentarily operate the opener down pressure
circuit as an active circuit. When approaching a
mound or valley where active hydraulics is desirable,
the tractor operator can MOMENTARILY PUSH THE
TRACTOR REMOTE HYDRAULIC LEVER FOR-
WARD which will allow the opener frames to follow the
uneven terrain with constant opener down pressure.
As soon as the drill returns to level ground RETURN
THE TRACTOR REMOTE HYDRAULIC LEVER TO
ITS NEUTRAL POSITION to "lock in" the preset pres-
sure once again. DO NOT activate the tractor remote
hydraulic lever for more than 20 seconds at a time,
once every 2 minutes. Always wait until the tractor and
drill are on level ground before returning the tractor re-
mote hydraulic lever to its neutral position. The tractor
remote hydraulic lever can be momentarily bumped
forward any time on level ground to assure the preset
pressure is correctly locked in and to reset the system
if it has not been operated for a long period of time.
NOTE: On some tractors with very positive remote
hydraulic checks, a slight increase in the reading on
the pressure gauges may occur after the tractor re-
mote lever is returned to neutral. This is caused by
back pressure on the opener cylinders and should be
ignored. The NET OPERATING PRESSURE on the
opener cylinders is maintained at the pressure you
selected while the tractor remote lever was held for-
ward–not at the "apparently increased" pressure. Re-
activating the tractor lever forward will confirm this.
6. After the opener pressure is set, opener depth is con-
trolled by the press-wheel adjustment. Attached to the
rear of each opener is one of several optional press
wheels. The press wheels close the furrow and gently
press soil over the seed while also providing depth
control for the opener. To adjust the position of the
press wheel, which automatically changes the seed-
ing depth of the opener, lift the "T" handle located on
top of the opener at the rear and slide it forward or
rearward until the seeding depth is correct as shown in
Figure 2-10, page 28. Moving the handle forward
plants shallower while moving the handle rearward
plants deeper. A spring loaded pin holds the "T" han-
dle at the setting to maintain the proper depth. Lift the
opener frames slightly to take the pressure off the "T"
handles when adjusting the press wheel depth.
NOTE: The opener pressure setting controls the soil
firming pressure on the press wheel as well as the
disk penetrating force. DO NOT use more opener
down pressure than necessary to obtain the desired
opener penetration and to maintain the proper firm-
ing action over the seed. Set the planting depth with
the depth controlling press wheel and only use
enough opener pressure to cut the proper seed
groove and maintain the desired soil firming action.
Excessive opener force will lead to excessive wear
and damage of the opener components.