By Yuri Kulikov

KIEV, June 21 (Reuters) Liberal forces behind Ukraine's ''Orange Revolution'' said today they had agreed to form a coalition government after nearly three months of talks and would sign an agreement within two days.

''Last night, three political forces completed work on a text for a coalition agreement,'' Roman Bezsmertny of President Viktor Yushchenko's Our Ukraine party told parliament.

Bezsmertny said a final text, bringing together Our Ukraine, the bloc of former Prime Minister Yulia Tymoshenko and the smaller Socialists, would be ready to sign on Friday.

A source in parliament told Reuters that Tymoshenko, Yushchenko's estranged ally, would get her old job back. Current Prime Minister Yuri Yekhanurov of Our Ukraine would become parliamentary speaker.

Disputes over the top jobs have hindered talks to rebuild the unity of those behind the mass protests in 2004 since an election in March in which the three parties won 243 of 450 seats in parliament.

The opposition Regions Party of Viktor Yanukovich won 186 seats but cannot form a government on its own.

Tymoshenko, dismissed by Yushchenko last year after less than eight turbulent months as premier, said the three parties had eliminated all differences aired publicly in weeks of talks, but had to work out ''technical formalities''.

She gave no date for the signing of the accord.

''I am certain that we will complete these formalities quickly and will soon be able to announce the formation of a democratic coalition,'' she told the chamber.

''No one can now hinder the creation of a coalition of democratic forces ...,'' she said. ''The main basis we have set down is moving Ukraine into the European mainstream.'' Bezsmertny said the agreement would probably be ready by tomorrow, but as June 22 marked the 65 anniversary of the Nazi invasion of the Soviet Union, party leaders felt it better to put off the signature until Friday.

The lengthy impasse has all but halted the work of the new parliament and severely hobbled government activity.

Yushchenko's Our Ukraine party allies, frustrated at the long delays, had been holding talks on a possible coalition on two fronts-with their liberal ''orange'' partners and with the Regions Party.

Yanukovich, humiliated in the Revolution when he lost a rerun of a rigged presidential election to Yushchenko, had sought to force the president's hand yesterday. He had threatened to proceed with the election of parliament's speaker if no coalition was formed within 24 hours.

REUTERS SHR HT1500