Great Plains 3S-4000F Operator Manual - Manual (Page 69)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 65
2014-06-10 Table of Contents Index 195-394M
Transport Carrier
When marker is folded, the second section should be
centered in transport carrier saddle and parallel with top
of drill box.
Refer to Figure 77
To adjust height of saddle, loosen
1 ⁄
2
x 2 inch U-bolt
that hold carrier tube to mounting bracket. Slide carrier
tube up or down as needed.
Marker Shear Bolt
Refer to Figure 78
The marker arm is attached to marker body with a shear
bolt
, which is intended to fail if the marker strikes an
obstruction, allowing the marker to swing back around a
second bolt
.
If the shear bolt breaks, replace it with an equivalent
7 ⁄
16
-14
×2 inch Grade 5 bolt (Great Plains part
802-589C). If that size is not available in your local
market, substitute an M10
×0.75 Class 8.8 metric bolt
and nut.
If your conditions result in frequent shears, the marker
shear base has storage holes for spare bolts.
Note: Replacing the bolt with a lower grade, or smaller
size, can result in nuisance shears.
Equipment Damage Risk:
Replacing the bolt with a higher grade can result in marker
damage.
Figure 77
Marker Transport Carrier Adjustment
18961
1
Figure 78
Marker Shear Bolt
23204
1
2
1
2