We have been made aware of an issue concerning the rotation of the mulcher drum. This issue is caused by the washer under the head of the bolts not being correctly flattened. Once these have been correctly flattened it then leaves the appropriate gap which allows the rotation of the drum housing.
In order to solve this, tighten the three adjusting bolts on the mulcher drum and then loosen the three nuts until they are very loose. This should then allow you to adjust the angles and then tighten the drum at the required angle.