Great Plains AS20 Operator Manual - Manual (Page 20)

AS15 and AS20 Planting System 148-153M 4/14/05 18 Great Plains Mfg., Inc.
Section 4 Hitch, Drill, & Planter Adjustments For No-Till Planting Conditions
Section 4
Hitch, Drill, & Planter Adjustments For No-Till Planting Conditions
Hitch Adjustments
Level Link Adjustment
1.
The threaded adjustment at the front of the level link
is to lengthen or shorten the link. Make this adjust-
ment with the unit lowered to field position and with
the cotters at the desired depth. With the lock plate
flipped down as shown in Figure 4-1, loosen the jam
nut and turn the adjuster nut to level the planting unit
front to back. Tighten jam nut to hold this position.
2. The lock plate at the rear of the level link can be
used for three different conditions:
a. Normally the lock plate is held down in the
locked position to keep the planting unit level
Figure 4-1. This does not allow the trailing unit to
tip forward or backward independently of the
hitch.
b. The lock plate can be held up in the unlocked
position with the level link adjusted so the top
hitch extension pin is in the back of the slot, Fig-
ure 4-2. This holds the planting unit from tipping
backward, but allows it to tip forward indepen-
dent of the hitch.
c. With the lock plate held up in the unlocked posi-
tion and the level link adjusted so the top hitch
extension pin is in the center of the slot, Figure
4-3, the trailing unit is allowed to tip forward and
backward independent of the hitch.
Level Link In Locked Position
Figure 4-1
12087
Level Link In Unlocked Position
Figure 4-2
12088
Level Link In Middle, Unlocked Floating Position
Figure 4-3
12089