Great Plains V-300F Operator Manual - Manual (Page 42)

38 V300 & V300F Great Plains Manufacturing, Inc.
148-057M-A 11/15/2007
Refer to Figure 39
5.
After the opener pressure is set, opener depth is
controlled 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 provid-
ing depth control for the opener. To adjust the posi-
tion of the press wheel, which automatically changes
the seeding depth of the opener, lift the “T” handle
located on top of the opener and slide it forward
or
rearward until the seeding depth is correct and
soil firming is optimal. See “Opener Depth (Press
Wheel Height)” on page 93 for additional detail.
Note: The opener pressure setting controls the soil firm-
ing 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.
Priority Flow Hydraulic Systems
On some tractors with load-sensing hydraulics, the #1
circuit is capable of taking nearly 100% of available
hydraulic flow. Operating the openers or markers on cir-
cuit #1 may starve the other circuits, making one or more
functions inoperable.
To operate markers and constant opener down pressure
at the same time, connect the openers to circuit #2 and
the markers to circuit #3.
Note: On some tractors with very positive remote hydrau-
lic checks, a slight increase in the reading on the
pressure gauges may occur after the tractor remote
lever is returned to neutral. This is caused by back
pressure on the opener cylinders and may be ig-
nored. 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.
Reactivating the tractor lever forward confirms this.
Figure 39
Opener Adjustment
15659
1
2
F
R
1
2
F
R