Vaderstad RAPID RDA S Series, Manual

Page: 79 / 118

RDA 600-800 S
Ver.3 29/06/07 79
4.11 Changing seed coulter mounting bolts
The disc arm has two recessed bolts for the coulter mounting. If these cannot be driven out, they
must be cut and ground level with the arm. It may be necessary to remove the entire disc arm to
do this. The bolts can then be driven out using a Ø 13.5 mm punch. There may be burrs left in the
hole 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 a
lock nut). Grease the threads of the washers and nut well and draw the bolt in using the nut. Be
sure to use enough washers so that the nut does not go beyond the thread on the bolt.
When changing or adjusting the coulters see ”2.28 Adjusting the seed coulters” on page 60.
4.12 Changing wheels
Figure 4.21
A Position the unfolded drill on a firm surface and resting on the discs with the wheels raised.
B Remove the scraper.
C Release the axle and pull the wheel downwards and backwards.
D Fit the axle to the new wheel (the nut on the RH side)
E Roll the wheel into the wheel fork and ensure that the axle is properly into its slots.
F Tighten the axle.
The tyre pressure should be 2.5 kg/cm
2
.
Figure 4.19 Figure 4.20