They face a string of charges alongside stablehands William Hernan and Tyson Kermond, involving 2018 Cup runner Red Cardinal and thoroughbreds Yogi and Tosen Basil.

McLean is alleged to have used poly pipes and electric shock devices on Red Cardinal and Yogi at Warrnambool during last year's spring racing carnival, between October 24 and Cup Day on November 6.

The techniques were allegedly part of an "illicit covert training regime" designed to deceive racing stewards while giving horses an edge for betting purposes, documents released by Melbourne Magistrates Court show.

Weir, McLean and Kermond are charged with using shock devices to torture, abuse, terrify and overwork Red Cardinal, Yogi and Tosen Basil at Warrnambool on October 30.

The trio is also accused of conspiring to cheat and defraud Racing Victoria stewards between October 24 and November 17.

Corrupt bets allegedly laid by McLean during the spring racing carnival included a $100 each-way punt on Red Cardinal on Cup Day, according to the documents.

Hernan faces one charge of putting a $50 bet on Yogi during a race on November 2 in a bid to win $600, allegedly using information McLean passed to him about the illegal training regime.

The four men, together facing a total of 34 charges and all banned from racing, appeared in Melbourne Magistrates Court on Wednesday for a filing hearing.

Their lawyer indicated the case could be moved to Warrnambool after additional documents were tendered.

They remain on bail and are due back in court on February 14, 2020.

Australian Associated Press