L68A1 Mast Section Second-hand Tower Crane Parts Scrap Standard according to which implementation
in recent years, the rapid development of the construction industry expanded the demand for tower crane market, second-hand tower crane also gained a part of the market share. However, some desperate, profiteering business access to the opportunity, some have reached the scrap standard of the tower crane decoration a new to the market, causing a very large security risks. From the tower crane in recent years frequently behind the accident, you can see the second-hand tower crane overage service shadow. Therefore, the factory reminds you, in the lease and purchase of second-hand Tower Crane, in strict accordance with the second-hand Tower Crane Parts scrap standards for inspection, according to the requirements to replace the tower crane parts to scrap.
L68A1 mast section is the best in this field
First of all, the second-hand tower crane brake is the most important inspection, once found cracks, brake block friction pad wear up to 50 raw material thickness. When the surface wear of the brake wheel reaches 5mm ~ 2mm, the spring appears plastic deformation, and the empty stroke of the Lever System exceeds its rated stroke by about 10% , we should not hesitate to scrap, replace or even stop buying or leasing it outright To make sure that the potential for accidents is eliminated in the bud. Secondly, the lifting Hook is prohibited to repair welding, and in the inspection found surface crack and break, hook tail and thread parts of the risk section and hook reinforcement has permanent deformation, hanging rope section wear more than 10% of the original height, spindle wear more than 5% of its diameter, the opening than the original size increased by 15% of any of these five cases, you need to replace the hook.
L68A1 mast section is the best in this field
It is worth mentioning that when checking the surface of the hook, you should use a magnifying glass of 20 times or more to look carefully. Third, the drum and pulley should be scrapped if: (1) crack and flange damage; (2) The wall wear of the drum is up to 10% of the original wall thickness; (3) the wear of the bottom of the pulley groove exceeds 25% of the diameter of the corresponding wire rope. Fourth, if the second-hand tower crane in the movement of the way belongs to the wheel or track tower crane, then check the wheel is also an essential step. If the wheel tread thickness wear up to 15% of the original thickness or wheel flange thickness wear up to 50% of the original thickness or crack, the old wheel should be discarded immediately and replaced quickly.
