11 Fieldwork 11.6 Threshing mechanism 67087 For 430 rpm, add a length of 6 rollers; for a speed of 300 rpm and for a speed of 265 rpm, add an additional length of 10 rollers to the chain. Tension the double chain moderately at tensioner bolt (4) with the clamping bolt (3) slackened off. After ten- sioning, tighten clamping bolt again. Whatever drive is used, drum speed read out is pro- vided by the tachometer in the combined instrument gauge on the operator's platform. 00 0293 210 2 - BA DOMINATOR 150/140/130 - 12/09 213