How to diagnose hydraulic system fault of excavator independently

As the construction machinery equipment, excavator workload can not be ignored, in the hydraulic engineering work, some problems will show more obvious, the machine hand can be well related to the finishing measures, but some failure performance is not very obvious. As a senior robot hand, you should learn good and fast independent diagnosis problem.

Here's a few tips for everyone:

Transposition diagnosis

The lack of diagnostic instruments or checked components in the maintenance of the site should not be opened more accurate, this method should be adopted first suspected failure components removed, replaced with new pieces of work or other normal machines, the same types of components to test, to see whether the exclusion of fault diagnosis can be made.

Diagnostic method used to check for failure, despite the structure, site element reserves or demolition inconvenience factors, the operation may also be more trouble, but if the balance valve, relief valve, one-way valve, small volume, easy to assemble the components, use of this method is more convenient. Commutation diagnosis can avoid the performance of hydraulic components reduced due to blind disassembly. If the fault is not checked by transposition method, the main safety valve is removed directly and disassembled. If the component is no problem, it may affect its performance after installation.

Visual inspection method

For a simple fault, directly through the eyes and ears of the parts were Shoumo, check and smell and other means, such as breakage, leakage, found loose deformation and failure to pass the examination, and timely repair or replacement parts; hold the tubing, if there is a pressure on the oil flow out of date will have a vibration feeling without oil flow or pressure is too low when there is no such phenomenon.

In addition, the hand can also judge with mechanical transmission components of hydraulic components is good for lubrication, hand feel element shell temperature changes, if the shell element overheating, poor lubrication; ear can determine the mechanical parts damage caused by the fault point and the extent of the damage, such as hydraulic pump, relief valve, open air the card will be issued a fault element impact sound such as water or "water hammer" and other abnormal noise; some parts due to overheating, poor lubrication and cavitation caused by sniffing the odor, can determine the fault point.

Instrument survey method

By means of measuring the various parts of the hydraulic oil hydraulic system pressure, flow and temperature to determine the system fault detection of the scene in general, due to the fault of the hydraulic system are often manifested as a low pressure, easy to detect; and flow are more difficult to detect, the size of the flow only through the implementation of element action make a rough estimate of speed. Therefore, in the field detection, more methods are used to detect the pressure of the system.