In fact, it is very common for excavators to have various problems. After such a long time, there is no doubt that there are problems. The importance of the rotation action is obvious to the excavator. It is also one of the most used operations in the eight actions of the excavator. Verifying the technicality of a master can be seen in the rotation operation that is familiar with driving. In other words, once an abnormality is found in the rotation operation, it directly determines the quality of the project completion and whether the construction period can be completed on schedule. Here, Kobelco excavator maintenance will discuss with friends how to deal with the excavator rotation failure.
Causes of rotation failure
the first:
When the excavator has a rotation failure, the first thing to check is the rotary handle plunger pump. This step is very simple, just look at whether everything is normal except for the rotation failure. If it is only a rotation failure, the rotary handle plunger pump can be basically removed.
However, there are always uncertain elements in order to eliminate this hidden safety hazard. Friends must still carefully check whether the plunger pump is stuck or damaged or leaked too much.
second:
Check whether the rotary brake is released. If it is not released, the rotation will not be easy to rotate. The rotary brake operation of different excavators is different. Some well-known excavator brands use relays to release the rotary brake.
It is also necessary to check whether the relay and valve core can be operated normally. Some excavators rely on the dominant operation to release the rotary brake. This type of rotary brake method is operated by the rotary brake delay valve. Therefore, if the valve core is stuck, the brake cannot be released.
third:
If the main oil has already reached the main control chip valve rotating valve stem, but there is no working pressure when rotating, it is necessary to check whether the rotating valve stem is stuck and the rotating main fuel pipe cannot be opened.
fourth:
If the main working pressure is normal, and the rotating overflow working pressure is normal, it shows that the rotating motor is normal. Then it is necessary to check whether the main shaft bearing of the rotating reducer is broken or the slewing ring is broken.
Summary: According to this article, friends can learn some basic fault detection and solution expertise, and can independently identify the fault point according to the fault condition, which can arrange time and save a lot of money. Of course, when encountering the problem that the excavator can't rotate, there are many high-precision components that must be inspected, disassembled and assembled. If it is a new operator or does not have certain maintenance capabilities, then friends should still be cautious. Control!
