Hydraulic suction hose burst is headache for many excavator masters, because the hose burst will cause hydraulic oil leakage, and waste time and money to maintain it. So what are the common causes of hydraulic suction hose detonation?
1. Inferior hydraulic suction hose is used
After the original hydraulic hose damage, in order to figure cheap, many people choose the inferior quality of hydraulic suction hose, this hydraulic hose performance, reliability is far less than the original. In addition, the metal joint of the two ends of the hydraulic suction hose is not good in the process of clamping, sealing and reliability can not be guaranteed, after a period of use, it will produce fuel saving and even oil leakage. Accordingly, we should choose normal big brand to replace hydraulic suction hose.
2. Excessive pressure in the hydraulic system
If the preset pressure of the hydraulic system is too high, it will increase the chance of hose detonation. The method is to test the pressure value generated by the main pump in combination with various actions. If the pressure value is confirmed to be too high, the pressure of the multi-way valve can be appropriately lowered.
3. The hydraulic oil temperature is too high
If the temperature of hydraulic system is too high, it will also affect the sealing of hydraulic components, causing pipe leakage. In addition, high temperature will make the hydraulic components expand, leading to the valve core, valve body stuck, the formation of local high temperature leading to tube explosion.
4. Mix different grades of hydraulic oil
Excavators usually use hydraulic oil of # 46 by default when they leave the factory. If 68 hydraulic oil commonly used in parts stores is added during the operation, the properties of hydraulic oil will be unstable and the components will be damaged. High viscosity hydraulic oil flow is poor, will make the hydraulic system local high pressure, easy to cause pipeline leakage.
5. Bad operating habits
If the operator operates rudely in the operation, the huge impact load will produce instantaneous impact pressure in the hydraulic system, which will lead to premature failure of oil leakage or pipe explosion at the joint of the high-pressure oil pipe joint and the rubber pipe, greatly shortening the service life of the hydraulic suction hose. In addition, rough handling can affect the durability of other components and lead to frequent mechanical failures. Therefore, the operation of excavator must be gentle at ordinary times, do not do high intensity, high risk action.
6. Hydraulic suction hose is corroded
Although most of the hydraulic suction hose now has a certain corrosion resistance, but after all, rubber products long-term contact with diesel will make the gel fluffy deterioration. Produce a certain adverse effect, try not to let the rubber hose contact gasoline and diesel, general rubber in the long-term immersion gasoline and diesel will swell the gel fluffy. Therefore, in ordinary use to avoid diesel oil and other corrosive liquid contact hose, often clean the surface of the hydraulic suction hose.
7. Abnormal vibration of hydraulic suction hose
Gear pump and plunger pump work have oil pulsation, the pulsation will make the hydraulic suction hose to produce high frequency vibration, this high frequency vibration can not be completely eliminated. Long-term abnormal vibration will lead to hydraulic suction hose fatigue wear, therefore, it is necessary to check the hydraulic suction hose clamp and protective cover, once the hose clamp is loose, will wear the hydraulic suction hose, or even wear through the it.