What’re the preparations and check of 450t gantry crane?
（1）Turndown the whole circuit, ensure the installation of gantry crane meet the requirements.
（2）Check the following parts:
a、If the steel structure become deformed, welding seam crack.
b、To refuel the lubrication point.
c、The whole running gear move flexible.
d、Fasteners solid connection.
e、Qualified gear connection；
f、Acceptable brake installation.
g、No obstacle for crane moving.
h、Whether the steel rope intersect or knot. The rope length coincide with the lifting height.
(3)Ground connection requirements：
a、Reliable electrical connection is needed for the steel structure.
b、Check the circuit and insulation resistance of electrical appliance
c, Check the wiring connection after cutting power.
