... the mast is attached to the slewing unit (gear and motor) that allows the crane to rotate. On top of the ... counterweights, hoist motor, hoist drum and the electronics.Hoist unit: the hoist unit houses the hoist drum, hoist cable, gear box, gear ... the tower crane afterwards, which may be more difficult than the installation. Tower Cranes can often be Pedestrian Operated by a remote control, removing ...