Instructions on Correct Operation and Maintenance of Stage Electrical Hoist

⚫ Don’t move or lift up the hoist with cables.

⚫ Don’t put the hoist down in case of no supporting pedestal, in order not to damage the components under the hoist. (Cables, load chain, cable gland and chain bag ).

⚫ Only trained and authorized personnel are allowed to modify hoists. The numerical values and regulators of safety components must not be changed without the permission of manufacturer. Don’t go beyond the limits indicated in the manual.

⚫ Don’t repair or modify hoists without the authorization of manufacturer or trained maintenance agents.

⚫ Don’t stop, regulate or disassemble limit switches or brakes on hoists without the authorization of manufacturer or trained maintenance agents.

⚫ Don’t drag, fluff or obliquely pull objects with hoists. Don’t touch moving components.

⚫ Don’t operate hoists in case of physical discomfort.

⚫ Don’t use hoists that are not repaired well (damage or deformation ).

⚫ Don’t make hoists subject to strenuous vibration.

⚫ Don’t use lifting chains as slings.

⚫ Don’t distract operators’ attention while they are operating hoists.

⚫ Don’t suspend the load when unnecessary. Don’t use hoists as earth wire for welding.

⚫ Don’t use hoists for other unexpected purposes and in other unexpected places.

⚫ To move hoists by hands, it is necessary to push the load.

⚫ Don’t operate hoists with safety components such as buffers at the end and emergency stop.

⚫ Don’t exert unnecessary control (avoid inching - stop - start up with buttons), or else hoists will be overheated and even damaged.

⚫ Don’t operate hoists with unauthorized power supply (voltage is too low or too high without phase).

⚫ Hoists must be handled with special structures or devices, or in original packages.

⚫ Don’t make hoists exposed to corrosive atmosphere(temperature, acidity……).

⚫ Make sure that hoists are always clean and kept from corrosion (lubrication ).

⚫ Hoists must be used under normal working conditions (ambient temperature and atmosphere ). For

outdoor operations, protective measures must be taken as far as possible to protect hoists from harsh weather conditions. Hoists must be covered well to prevent water from flowing into their chain bags. There must be scuppers a the bottom of chain bags.

⚫ Store hoists in normal working position (without load) to protect them from corrosive atmosphere (dust and humidity).

⚫ Hoists must be installed by professionals.

⚫ Clean and lubricate moving components (chains included) according to this manual. Components of hoists must be replaced with genuine accessories suitable for models of hoists. Don’t use suspicious parts or

components of unknown sources.

⚫ Make sure that limit switches are on correct position.

⚫ Make sure that structures attached to hoists and those supporting hoists are rigid. Chain hoists must be regularly maintained according to this manual.

⚫ Hoists must be regularly maintained according to this manual.

⚫ Clean and lubricate moving components (chains included) according to this manual. Components of hoists must be replaced with genuine accessories suitable for models of hoists.Don’t use suspicious parts or components of unknown sources.

⚫ Don’t obliquely pull the load, and the maximum allowable angle must be 10°.

⚫ Confirm that the load has been correctly balanced before moving it, in order not to increase load only through a point. Use appropriate accessories such as slings and lifting beams ). Pay attention to the

center of gravity of handled load.

⚫ The elements for hanging load must be independent of load (they should be soft slings at best rather than rigid beams).

⚫ In moving the load, make sure that the load is lifted up to a height enough for it to keep away from surrounding machines and other objects. Make sure the hoist is perpendicular to the load before lifting the load up.

⚫ Avoid swinging the load or hook in using little trolleys or cranes. If several different speeds are optional, the speed must be low during starting and braking operations.

⚫ Moving a load with several hoists must be supervised by several experienced supervisors. All requisite preventive measures must be taken to ensure load distribution and avoid imposing excess load on any hoist. Before this operation, all hoists must be inspected carefully.

⚫ In case of dangerous operations or problems with hoists (abnormal noise or movement ), please notify

necessary personnel.