Maintenance and repair of tower cranes

Maintenance and repair to ensure the safe and economic use of tower cranes , extending its life , we must do the tower crane 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 , Pallet stackers 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, scissor pallet truck 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 .