- end-piece (3) on 3-way union, feeding brake control valve. - union feeding rear brake (1). Eliminate the power assisted steering by inserting a foil between the sealing plate and flange, thus blocking the feed openings. Disconnect rear suspension feed pipes (4) and (5) from power assisted steering union (6) Connect the feed pipes to a 3- way union A, and block the third opening with a plug. Tighten the bleed screw.