Maintenance and repair of hoist equipment

Maintenance and repair of  hoist equipment

Maintenance and repair to ensure the safe and economic use of  Hoist equipment   extending its life, we must do the  hoist and trolley maintenance and repair and lubrication work.

Tower crane maintenance
1, and keep the machine clean, timely cleaning.
2, check the gearbox oil, timely refueling.
3, pay attention to check all parts for loose wire, broken wire, and wear phenomena, such as exceeding the relevant regulations must be promptly replaced.
4, check the brake performance, the gap, must ensure a reliable sensitivity.
5, check the reliability of the safety device sensitive.
6, check the bolt connections, in particular standard tower section connecting bolt, with each period of use, you must re-tighten.
7, check the wire head plate, clips, etc. are loose, should be tightened.
wire rope, drum, pulleys, hooks and other scrap, should be strictly enforced GB5144, and GB5972 requirements. 8, check the metal components of the rods, webs and weld cracks, paying particular attention to the place and location of peeling paint, especially in the paint was peeling a 45 ° diagonal stripes most dangerous and must quickly identify the cause and timely manner .
9, the tower everywhere (including basic section of the chassis connection) connecting bolts and nuts, around the pin connection diameter greater than Φ20 so are dedicated special parts, under any circumstances, is absolutely not allowed to substitute, and tower installation when every one must have two bolt nut.
10, the standard bolt property class 10.9, nuts performance rating of 10 (double nut locking), the top surface of the bolt head and the nut head top surface must have a performance rating mark, or will be allowed to be used.
11, machine and metal bodies after each use of a project should be carried out rust and paint stencilled once.
12, check the spreader magnification changer device and rope hook retaining device is safe and reliable.
13, the electrical contacts are observed oxidation or burning, if it is bad to be repaired or replaced.
14, the limit switches and buttons can not fail, if rusted or damaged parts should be replaced.
15, the electrical switch, and the switch boards, etc. must be well insulated, the insulation resistance of not less than 0.5MΩ.
16, check the electrical components of the fastening bolts are loose, cables and other wires is broken, if it should be immediately removed.