Ensure the crane did not forget to check the safety of electrical equipment grounding line suspended nine tons of line hanging Before, we used to submit a report on the contents of the crane electrical equipment grounding check, which will help us to go by the book, you can ensure that the line hanging Safe and Secure! 1. Check with integral metal structure to do the grounding line, the connection with a non-weld metal structure at seven tons of line hanging, whether to use a separate ground lines or jumper treatment; 2. Check that all electrical equipment Lifting normally energized between the metal housing, the transformer core and the metal barrier, threading metal ducts, cables and other metal sheath and the metal structure is a reliable ground connections. Line hanging job jog performance checks mainly for line hanging job during hoisting, slewing, luffing mechanism of action sensitivity and accuracy for debugging. Line hanging debugging requirements: when the relevant agencies to ensure that the lifting operation smooth, accurate operation, no creep, vibration, shock and driving power increases and other abnormal phenomena: lifting, jogging good performance slewing, and luffing mechanism. Debugging conditions: basic boom, boom elevation angle 50 °, lifting the rate of work under the rated lifting capacity to stop after one meter height. Debugging methods: pulling the joystick to the crane (down) position line hanging, when heavy braking slight movement immediately. Continuous landing boom 10 times, measuring the weight cumulative distance horizontal movement, and calculate the average per-action arm landing shift amount. Its value should meet the specified value, or should be adjusted brake reliability and sensitivity (wire luffing mechanism) or the back pressure in the hydraulic circuit balancing valves and secondary safety valve set pressure (hydraulic cylinder luffing). 5 tons of line hanging | Liuzhou line hanging | by Henan generous generous heavy heavy machinery Limited. Heavy Machinery Co., Ltd., Henan Province, generous (www.hnqizhongshebei.com) (www.hnqizhongshebei.com) strong, credible, in Zhengzhou, Henan engineering, construction crane industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving generous innovative ideas will lead into the brilliant heavy and you work for a better future!