Great Plains PH-20 Operator Manual - Manual (Page 23)

21
Section 3 Adjustments
12/29/2011 PH-15, PH-20, PFH-15 and PFH-20 Precision Fertilizer Hitch 148-365M
Great Plains Mfg., Inc.
Lock Plate
Set lock plate to match your field conditions. The lock plate
is at the top drill link.
No-Till or Hard, Dry Soil Conditions
For maximum opener penetration, operate drill and hitch
in rigid position. See Figure 3-5. The rigid position is the
most common position for no-till seeding and is effective
for a wide range of field conditions. Lock plate down over
top link pin.
Figure 3-5
Link in Rigid Position
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Minimum Till, Average Soil with Hills and Terraces
For softer soils that have been tilled lightly and for drilling
over hills, contours, ditches or terraces, operate drill in lim-
ited-float position. See Figure 3-6. Leave lock plate un-
locked and adjust level link so top link pin is at back of slot.
(Refer to Leveling Adjustment, page 22.) The limited-float
position allows hitch and drill to flex when traveling over
contours but transfers enough weight to drill for opener
penetration in softer soils.
Figure 3-6
Link in Limited-Float Position
Conventional Till, Very Soft Soils
(00 Series Openers Only)
For maximum flotation over hills and contours in soft soils,
operate drill and hitch in maximum-float position. See Fig-
ure 3-7. Leave lock plate unlocked and adjust level link so
top link pin is in center of slot. In maximum-float position,
drill tips forward and back independent of hitch.
Figure 3-7
Link in Maximum-Float Position
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