1.Do not pay attention to the model of accessories, accessories substitute or misuse phenomenon is more common

In the maintenance of aerial work platform, parts replacement or misuse phenomenon is still more common, some parts emergency replacement is feasible, but long-term use is harmful, affecting the safety and technical performance of machinery.

Some maintenance personnel have less understanding of the mechanical structure and principle, and many spare parts do not match the model, but they think that as long as they can be installed, they do not consider whether the technical performance of the machinery can be played. Therefore, when maintaining the aerial work platform, the original model of accessories should be used as far as possible, and other models of accessories can not be used instead, but can not be misused.

        2.The maintenance method is not formal, and "treating the symptoms rather than curing the root cause" is still the usual means of some maintenance units

In the maintenance of aerial work platform, some maintenance personnel do not take the correct maintenance method, that emergency measures are omnipotent, to "emergency" instead of "maintenance", "symptoms do not cure the root" phenomenon is still many.

Such as the frequently encountered "welding instead of repair", is an example, some parts can be repaired, but some maintenance personnel to save trouble, but often use the "welding dead" method. After the connection thread of the hydraulic cylinder earring and the cylinder piston rod is damaged, the direct welding method will cause the cylinder oil seal to be damaged and unable to be replaced, resulting in serious oil leakage;

When it is found that the working device moves slowly or the steering is difficult, the working pressure of the system is blindly increased without checking the cause of the fault, resulting in too high system pressure, easy to damage the oil seal, pipeline, hydraulic components, etc.; In order to make the diesel engine "strong", artificially increase the fuel supply of the injection pump and increase the injection pressure of the injector.

These irregular maintenance methods can only be emergency, but not long-term use, we must fundamentally find out the cause of the fault, take regular maintenance methods to eliminate the fault, should attract the attention of maintenance personnel.

       3.The use of gaskets is not standardized and the phenomenon of arbitrary use still exists

There are many types of gaskets used between the mating surfaces of the components of the aerial work platform, commonly used are asbestos pads, rubber pads, cardboard pads, cork pads, felt pads, non-ferrous metal pads (copper pads, aluminum pads), copper (steel) asbestos pads, insulation pads, spring pads, flat pads, etc. Some are used to prevent oil leakage, water leakage, air leakage and electricity leakage between the mating surfaces of parts, and some play a fastening and anti-loosening role.

Each type of gasket use time and occasion have different regulations and requirements, in the maintenance of aerial work platform, gasket use is not standardized or even misused phenomenon is still more serious, resulting in frequent leakage between the match surface, bolts, nuts loose, loose, affecting the normal use of aerial work platform.

If the engine cylinder pad is too thick, the compression ratio is reduced, and the engine is difficult to start; The use of copper gasket between the fuel injector and the cylinder head mating surface, such as the use of asbestos pad instead, easy to make the fuel injector poor heat dissipation and ablation;

The gasket between the fuel injection pump and the fuel injection pump is too thick, resulting in insufficient oil transfer and oil transfer pressure, and the power of the diesel engine is reduced. If the spring pad, locking pad and sealing pad are missing, the joint is not tight, and it is easy to loose or leak oil; Because there is a hole in the middle of the gasket and forget to open the hole, the oil passage and the water channel are blocked, and the phenomenon of the engine burning tile holding the shaft and the water tank boiling often occurs.