RDA 400S27.06.2011ver.2 1015.10 Changing disc bearingsThese 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 fromVäderstad-Verken AB, Part No. 413549.When the bearings are changed, the new seals must be greased. See the diagram for details on theorientation of the seal components. The bearing must be tight on the disc hub. Every bearing hasa grease nipple which must be lubricated according to the grease table intervals see ”5.7 Lubrica-tion points” on page 98, and always after pressure washing, or at least once a season. Pump ingrease until some appears.5.11 Changing seed coulter mounting boltsThe disc arm has two recessed bolts for the coulter mounting. If these cannot be driven out, theymust be cut and ground level with the arm. It may be necessary to remove the entire disc arm todo this. The bolts can then be driven out using a Ø 13.5 mm punch. There may be burrs left in thehole when the old bolt is removed. File these away so that the new bolt can be driven in more eas-ily. Press or drive the new bolt in, or draw it into position using a few washers and a nut (not alock nut). Grease the threads of the washers and nut well and draw the bolt in using the nut. Besure to use enough washers so that the nut does not go beyond the thread on the bolt.When changing or adjusting the coulters see ”3.17 Adjusting the seed coulters” on page 40.Figure 5.18 Figure 5.19 Figure 5.20Figure 5.21 Figure 5.22
