He ordered Cleaver and his family to vacate their house on the farm by the end of the day.
Hall was charged with assault and, despite denying the attack, was convicted by the District Court. An appeal to the High Court was unsuccessful.
Mr Dumbleton said assaulting an employee could "rarely if ever" be justifiable.
He dismissed Hall's evidence that Cleaver had mistreated a cow before the incident, and that he had failed to warn him that milk was spilling to waste.
He ordered Hall to pay his former employee $45,000 for hurt feelings, humiliation and distress after being "dismissed abruptly and assaulted, and through having himself and his family put out of their accommodation with virtually no choice".
Cleaver was to be further reimbursed for 17 weeks lost wages for the time it took him to find another job.