Barnsley have added to their attacking options with the signing of Mike Phenix from AFC Telford.
Former Barcelona goalkeeper Victor Valdes is training with Manchester United as he recovers from a serious knee injury.
Former Croatia, Everton and West Ham manager Bilic, 44, took charge of Lokomotiv last summer but could only guide the club to a ninth-placed finish in the 16-team Premier League - the club's worst finish since 1991.
A statement on Lokomotiv's official website said Bilic's contract had been cancelled by mutual consent.
His replacement Kuchuk, 53, is the former manager of Kuban Krasnodar, Salyut Belgorod and Sheriff Tiraspol.