Great Plains 2015 Operator Manual - Manual (Page 12)

2015 Three-Point Soybean Machine 173-088M 4/18/05 10 Great Plains Mfg., Inc.
Section 2 Assembly Instructions & Set-Up
Tractor Requirements
Great Plains 3-Point Drills are engineered to be used
with Category II, Category III Narrow, or Category III
Wide tractors. 20' 3-Point Drills are factory set for Cate-
gory II tractors. To change to Category III, exchange the
left hand pin support with the right hand as shown in Fig-
ure 2-4.
In addition, the following bushings (not supplied by
Great Plains) may be needed to fit your quick hitch or
tractor’s 3-point arms:
Upper link 1” ID x 1 1/4” OD x 2 1/8” max. long
Lower links 1 1/8” ID x 1 7/16” OD x 2 1/4” max. long
Be sure that all tractor 3-point arms are securely pinned
before lifting the drill. Adjust the top 3-point link so that
the top edge of the box is parallel with the ground. DO
NOT use the link to adjust the depth of opener penetra-
tion. Three hitch pins are furnished with each 3-point
Drill.Set your tractor 3-point draft control in the float
position.
.
12148
Category II (Factory Set) Hitch
Figure 2-4
12150
Category III Hitch
Figure 2-5