Hydraulic tube squib is a headache for many excavator masters. Because the squib will cause hydraulic oil leakage, the after-sales maintenance is time-consuming and costly. What are the common reasons for hydraulic tube squirting?
1, using a poor quality hydraulic pipe
Many people in the original hydraulic pipe damage, in order to cheap, many people choose quality is not up to standard inferior hydraulic pipe, the performance of this hydraulic pipe, reliability is far less than the original.
In addition, the metal joints at both ends of the hydraulic pipe are poorly pressed, and the sealing and reliability cannot be guaranteed. After a period of use, fuel consumption or even oil leakage will occur. Therefore, the replacement of the hydraulic pipe must select a regular big brand product.
2, hydraulic system pressure is too high
The pre-set pressure of the hydraulic system will increase the probability of squib. The method is to test the pressure generated by the main pump in combination with various actions. If the pressure value is confirmed to be too large, the pressure of the multi-way valve can be appropriately lowered.
3, the hydraulic oil temperature is too high
If your machine's hydraulic system is hot, it will also affect the sealing of the hydraulic components, causing the explosion of the pipe; in addition, the high temperature will cause the hydraulic components to expand, causing the valve core and the valve body to be stuck, forming a local high temperature and causing the pipe to burst.
4, mixing different grades of hydraulic oil
Excavator factory default uses 46# hydraulic oil. If you add 68# hydraulic oil which is common in the accessory shop during use, the hydraulic oil will be unstable and damage the components. The high viscosity hydraulic oil will have poor fluidity. The hydraulic system locally generates high pressure, which is easy to cause pipeline leakage.
5, bad operating habits
If the operator operates rough during the operation, the huge impact load will generate instantaneous impact pressure in the hydraulic system. The impact pressure will lead to premature failure of the high pressure oil pipe joint and the hose to leak or burst the pipe, greatly shortening the hydraulic pressure. The service life of the pipe. In addition, the rough operation will affect the durability of other components, causing frequent mechanical failures. Therefore, the operation of the excavator must be gentle, not high-intensity, high-risk action.
6, the hydraulic pipe is corroded
Although most of the current hydraulic pipes have certain corrosion resistance, after all, the long-term exposure of the rubber products to the diesel oil will cause the colloids to fluffy and deteriorate. A certain adverse effect is caused. Try not to let the rubber hose contact with the gasoline and diesel, and the rubber is generally soaked in the gasoline and diesel for a long time. It will swell the colloid and fluffy. Therefore, in normal use, avoid contact with the corrosive liquid such as diesel oil, and always clean the outer surface of the hydraulic pipe.
7, abnormal vibration of hydraulic pipe
Both the gear pump and the plunger pump have oil pulsation during operation. This pulsation will cause high-frequency vibration of the hydraulic pipe. This high-frequency vibration cannot be completely eliminated. Long-term abnormal vibration will cause fatigue and wear of the hydraulic pipe. Therefore, it is often necessary. Check the pipe clamp and protective sleeve of the hydraulic pipe. Once the pipe clamp is loose, it will wear the hydraulic pipe and even wear the hydraulic pipe.
