Great Plains FH6800HD Operator Manual - Manual (Page 41)

Great Plains Manufacturing, Inc. Appendix B - Initial Setup 37
04/28/2014 564-070M
Tooth Angle
Refer to Figure 21
Tine tooth angle is set by the tooth angle plate
.
The tine teeth are factory-set with the sharp break
side
toward the direction of motion ( ).
This pulls the teeth at 40
° off vertical (50° relative to the
ground). This angle is suitable for most conditions, has
no speed restrictions, usually creates a more optimal
seedbed, and provides easier residue flow.
For a more aggressive tine angle of 22 ° off vertical (68°
relative to the ground), reverse all harrow sections at
their chain connection to the arms.
Excess Wear / Irregular Results Risks:
Do not exceed 4
1 ⁄
2
mph (7.2 kph) with tines at 22
°.
Machine loads are much higher.
Tine sections may also hop on the ground.
To change tine angle:
Spot Implement
1. With the harrow directly hitched to a tractor (not to
another implement), fully unfold the implement in
field conditions (page 16). Allow enough room for the
tractor to approach either end of the harrow sections.
Pull forward to lay the sections flat on the ground.
Disconnect/Move Leading Chains
Refer to Figure 22
2.
Disconnect the trailing end of the leading chains
from the harrow sections. Remove and save only the
lock nut:
803-019C NUT LOCK 1/2-13 PLT
it is re-installed at step 6.
Refer to Figure 22 and Figure 23
3.
Disconnect the leading ends of the leading chains
from the section frame. Remove fasteners:
802-722C HHCS 9/16-12X3 1/2 GR5 ZNYCR
803-319C NUT HEX TOP LOCK 9/16-12 ZNYCR
Re-attach them at the other frame hole.
Use the upper hole for the 22
° tooth angle.
Use the lower hole for the [standard] 40
° tooth angle.
Tighten nuts only until bolt does not rotate freely.
Figure 21
Tooth Angles
31746
1
38
40
°
22
°
38
1
Figure 22
Disconnect Leading Chain
31648
64
70
61
40
40
64
Figure 23
Relocate Leading Chain
31756
40
22
°
40
°
40
61
70