<p>Hydraulic traction device comprises at least one pair of working sections (11, 13) that can be adjusted relative to each other and at least one exchangeable piston/cylinder arrangement made of plastic. The piston (15) is removably coupled to one working section and the cylinder (17) to the other working section. The piston/cylinder arrangement is reinforced by an outer support (19) supporting the outside of the cylinder and by at least one inner reinforcing insert (21, 23) inserted together with the piston into the cylinder. Preferred Features: The piston and the cylinder are disposable items made by an injection molding process.</p>
