Hydraulic lift (elevator) modernizing process involves dismantling drive and cable, fitting counterweight with pulley and pulley drive unit, diverting pulley and fixing devices

摘要

The modernizing process involves dismantling the hydraulic drive unit and cable, installing a counterweight (22) with diverting pulley (56) between the cabin (2) and the shaft wall (66), installing a pulley drive unit (30) with drive pulley above or below the counterweight, fitting another diverting pulley (50) to the cabin and installing fixing devices (38, 40, 42, 44) and cables (46) round the pulleys, then fixing their ends.