Crane is a kind of large lifting equipment. In the operation of the project, once a problem occurs, it will not only hinder the smooth progress of the work, but also endanger the life and safety of personnel. Therefore, it is necessary to check all components before putting the vehicle into operation to ensure that everything is safe and reliable. The pre-use inspection mainly includes the following aspects.
1. Each cylinder of the engine has a large mass high-speed reciprocating motion, and its dynamic performance is very complicated. Therefore, the inspection is mainly carried out through the power of the engine and the oil. Select the no-load power measurement method to determine the value of the inertia coefficient. Measuring the average acceleration and acceleration of the engine within the specified speed range or measuring the instantaneous acceleration at a certain speed can judge whether the oil is normal or not according to the wear condition.

2. Generally, hydraulic transmission is used for the experiment of the hydraulic system of the crane. Before checking the hydraulic system, check the oil level of the hydraulic oil tank and the deposits on the bottom of the oil tank. After measuring the oil temperature, oil pressure and flow of the hydraulic system to determine whether there is a problem.
3. Crane steel structure experiment The steel structure here mainly refers to the boom. Mainly check the flatness of the boom cover and the web; the parallelism between the upper and lower cover and the two webs; the straightness of the upper web and the lower cover of any section. Through these data, we can see whether the boom is deformed, whether the strength and the hill are reliable

Driving inspection, the wire rope directly touches the suspended object. Therefore, it is necessary to ens