Great Plains 1205NT Installation Instructions - Manual (Page 4)

4 Harrow Front Parts Great Plains Mfg., Inc.
116-156M Front Parts 2014-02-10
Adjust Angles
Note: Figure 6 depicts one harrow setting that has
proven successful in no-till and minimum-till
conditions. Your field conditions may differ due to
soil type, moisture levels and residue. Some
further adjustment of the tine assemble and
individual tubes may be necessary.
Adjust Frame Angle
Ideally, make these adjustments in field conditions, with
the openers lowered and into the ground.
Refer to Figure 6
13. Check that the tine angles
and are
approximately as shown.
14. Loosen the four trailing nuts that secure the
arms to the frame weldment . Adjust the
frame angle so that the rear tine tube is:
1 to 1.5 inches (25-38mm) lower than the front tube.
Secure the nuts.
Adjust Tine Angle
15. Adjust the rear tine angle to 45 °. Loosen the rear
nut at each of three U-bolts that secure the tine
tube to a center brace weldment. Adjust the gang
angle and re-secure the nuts.
16. Adjust the front tine angle to 35
°. Loosen the rear
nut at each of three U-bolts that secure the tine
tube to a center brace weldment. Adjust the gang
angle and re-secure the nuts.
If the tines required more than a few degrees of
adjustment, recheck the frame angle. If the frame angle
requires adjustment (step 14), also repeat step 15 and
step 16.
Close-Out
17. Raise the drill to transport height. Verify that the
chains lift the harrow to adequate ground clearance.
If more clearance is desired, move the upper bolts a
few links further down the chains.
Harrow Operation
The harrows engage/disengage automatically as the drill
is lowered and raised in field operations, and require no
change to normal operations.
Harrow Maintenance
Check frame angle, tine angle and bolt torque
periodically.
Replace spring tines when worn.
45°
35°
Figure 6
Assembly and Tine Angles
14612
Direction of Travel
6
4
5
40
30
30
35
27
4 5
40
35 27
6
5
30
4
30