•Jacks should be placed in a dry and dust-free place, and should not be exposed to sunlight or rain.
• Before using the jack, it should be cleaned thoroughly and the piston lifting and various components should be checked for flexibility, damage, and cleanliness of the oil.
•When using a jack, it should be placed in a flat and sturdy place. On a soft ground, a cushion plate should be laid to expand the bearing area. The selection of cushion plates should be based on geological conditions and be suitable for the weight borne by the jack. The top of the jack should be padded with wooden boards at the contact point with the object to avoid equipment damage and sliding.
•Jacks shall not be used under excessive load, and the handle shall not be arbitrarily extended or pressurized by multiple people. The lifting height shall not exceed the marking line on the sleeve or piston. If there is no marking line, the lifting height during use shall not exceed three-quarters of the total height of the screw thread or oil plug.
•When operating, the object should be lifted slightly first, and then check whether the base plate at the bottom of the jack is flat, firm, and whether the jack is vertical. If the jack is uneven, firm, or skewed after being compressed, the jack must be loosened and processed before lifting upwards. When lifting, a safety board or iron filling plate should be placed underneath the object as it rises to prevent the danger of sudden piston drop caused by jack or oil return. When lowering the hydraulic jack, simply open the throttle slightly to slowly lower it, and do not suddenly lower it to avoid damaging the internal cup and rendering the jack unusable, or spraying oil on people.
•If there are several jacks simultaneously lifting an object, unified command should be given, and the object should be lowered simultaneously at a similar speed to avoid accidents caused by the object tilting during lifting. If conditions permit, a public oil pump can be used for centralized operation.