RDA 400S
27.06.2011
ver.2 41
3.17.2 Tightening nuts
The seed coulters are spring-mounted on two bolts and the soft washers press the seed coulters
closer to the discs as the nuts are tightened. Do not tighten the nuts more than the coulters can be
easily tilted with one hand. The coulter must not have too close contact with the disc, since this
will cause increased wear and rotational friction.
For very loose soil and/or shallow drilling depths, it may be necessary to slightly loosen the nuts.
When new seed coulters are mounted, it is necessary to check the width of the slot between the
disc and the coulter. The slot should be wider at the top. Unless this is the case, plant residues may
collect here. If the seed coulters do not make contact at the correct place, this can be adjusted by
adjusting the metal plates at positions D and E inside or outside the fastening iron. The point of
contact can also be slightly moved by tightening the front nut more than the rear one.
Figure 3.40 Figure 3.41
Table 3.1
Position Reference distance between disc and seed coulter
1 > 0 mm
2 0 mm
3 > 0 mm
To Next Page
