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4.8
Service cover
Figure 4.15
At the bottom of the seed hopper there is a cover that provides access for lubrication and service
of the parallel linkage mechanism.
Loosen the screws (A). The cover (C) can then be removed by pushing up and lifting it out.
When reinstalling the cover, make sure it has full contact with the seed hopper to ensure correct
sealing.
4.9
Changing discs
Make sure that the drill is securely supported on trestles.
When changing discs, use a ratchet spanner or preferably a nut runner. Turn the disc so that the
completely flat side faces the seed coulter.
The discs have sharp edges, so wear gloves!
NOTE!
Adjust the coulter if necessary, see "2.27 Adjusting the seed coulters" on page 59.
4.10 Changing disc bearings
Figure 4.16
These consist of a ball bearing which is pressed onto the disc hub and secured with a circlip. Cir-
clip pliers and a puller should be use to dismantle the bearing. A special puller can be ordered from
Väderstad-Verken AB, Part No. 413549.
When the bearings are changed, the new seals must be greased. See the diagram for details on the
orientation of the seal components. The bearing must be tight on the disc hub. Every bearing has
a grease nipple which must be greased after every 150 hours of work and always after pressure
washing, or at least once a season. Pump in grease until some appears.
Ver.3 29.06.2007
A
B
Figure 4.17
RDA 400-450 S
Figure 4.18
75
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Troubleshooting
