A device for dosing a granular or grainy material in a distribution machine, having - a housing; - an inlet opening, which is formed on the housing and through which a granular or grainy material can be introduced in the housing for dosing; - an outlet opening, which is formed on the housing and through which the granular or grainy material can be discharged from the housing after dosing; - a dosing chamber, which is formed in the housing in such a way that the granular or grainy material in the housing can pass from the inlet opening to the outlet opening via the dosing chamber; - a dosing wheel, which is arranged in the dosing chamber on a drive shaft and which is configured to dose the granular or grainy material supplied via the inlet opening; - a mounting opening, which is formed at the housing and through which the dosing wheel can be replaceably mounted in the dosing chamber; and - a mounting component, which is arranged detachably in the mounting opening in a mounted position and at least partly closes the mounting opening at the housing, wherein the mounting component has a receiving device for releasably receiving the dosing wheel such that the dosing wheel received on the receiving device is mounted on the drive shaft when the mounting component is arranged in the mounted position and that when the mounting component is released from the mounted position, the dosing wheel is compulsorily removed from the drive shaft such that the dosing wheel can thereby be removed from the dosing chamber and removed from the housing together with the mounting component; characterized in that the receiving device has at least one end-face pin projection, onto which the dosing wheel is detachably fitted such that the dosing wheel is arranged on the end face of the mounting component and the at least one end-face pin projection engages through an opening of the dosing wheel. - a housing; - an inlet opening, which is formed on the housing and through which a granular or grainy material can be introduced in the housing for dosing; - an outlet opening, which is formed on the housing and through which the granular or grainy material can be discharged from the housing after dosing; - a dosing chamber, which is formed in the housing in such a way that the granular or grainy material in the housing can pass from the inlet opening to the outlet opening via the dosing chamber; - a dosing wheel, which is arranged in the dosing chamber on a drive shaft and which is configured to dose the granular or grainy material supplied via the inlet opening; - a mounting opening, which is formed at the housing and through which the dosing wheel can be replaceably mounted in the dosing chamber; and - a mounting component, which is arranged detachably in the mounting opening in a mounted position and at least partly closes the mounting opening at the housing, wherein the mounting component has a receiving device for releasably receiving the dosing wheel such that the dosing wheel received on the receiving device is mounted on the drive shaft when the mounting component is arranged in the mounted position and that when the mounting component is released from the mounted position, the dosing wheel is compulsorily removed from the drive shaft such that the dosing wheel can thereby be removed from the dosing chamber and removed from the housing together with the mounting component;