Small excavator hydraulic system heating
Posted: Feb 12th, '25, 21:31
In the normal operation of a small excavator, the oil temperature of the hydraulic system will not exceed 50℃. Once it exceeds 50℃, the system may heat up. If its temperature is greater than or equal to 80℃, it may cause a defect in the hydraulic system of the small excavator, and the hydraulic system begins to heat up. If the hydraulic system of a small excavator gradually becomes hot, a series of problems will arise: the pressure received by its operation will decrease, the output power will be insufficient, the power output will be unstable, the control will be insensitive, etc., and it will also affect the continuous operation of the hydraulic system, resulting in inability to operate. Therefore, it is necessary to make a diversified analysis of the defects of the heating of the hydraulic system of the small excavator, take timely precautions, and ensure the stable operation of the hydraulic system of the small excavator.
1 The effect of heating of the hydraulic system of a small excavator
In the process of using a small excavator, the heating of its hydraulic system is a defect phenomenon that occurs frequently, and its analysis and treatment process is relatively complicated. At the beginning of the defect, all functions work normally, but as the oil temperature in the hydraulic system continues to rise, some obvious abnormal problems will appear after one hour of continuous operation, affecting the normal operation of the hydraulic system, making its internal organizational system work slowly and the excavation force insufficient. Therefore, if the heating defect of the small excavator is not dealt with in time, it will have a great impact: ① The viscosity of the oil decreases, increasing the possibility of leakage, promoting more severe heating of the system, and thus a vicious cycle; ② The oxidation rate of the oil is accelerated, and the small holes of the components are blocked, affecting the use of hydraulic components; ③ It is easy to cause hose aging and rubber seal failure; ④ It increases the wear of the oil pump and hydraulic valve parts, and even causes them to be scrapped and unable to be used.
Analysis of heating defects in the hydraulic system of small excavators
2 Factors affecting heating of the hydraulic system of small excavators
1) Unreasonable system structure and unqualified parts
Irrational system structure, improper operation or unqualified parts of the hydraulic system, such as too thin hydraulic oil pipelines, too small tank volume, hydraulic oil pipelines that cannot be 90°, and poor heat dissipation of the tank during operation, will cause heating of the hydraulic system of the excavator.
2) Low viscosity of hydraulic oil
The hydraulic oil in the hydraulic system of a small excavator is viscous. When its temperature rises, the viscosity of the hydraulic oil will decrease. At this time, it is easy to cause system leakage, affecting the operating efficiency of the small excavator. And the hydraulic oil has a lubricating effect. If its viscosity decreases, the protective film it forms on the surface of the system will become thinner, the effect will decrease, and the wear will be aggravated when it moves on its surface, and the utilization rate of the components will also decrease. In addition, unreasonable use and repair of the hydraulic system will increase the possibility of system heating. For example, if the operator refuels blindly, the oil level in the shock absorber box will be too high, and the system may heat up at this time; unreasonable repairs to the hydraulic system will affect the operation of the system and may also cause the system to heat up.
3 Ways to deal with the heating defect of the hydraulic system of small excavators
(1) Strengthen the setting of its heat dissipation device
The setting of the heat dissipation device in the small excavator is the guarantee for the normal operation of the hydraulic system of the small excavator. The cooler can be arranged in the hydraulic system, and the ventilation function of the cooler must be ensured. The heat dissipation pipeline of the cooler and the belt of the fan should be checked in time to enhance its heat dissipation function and clean it at any time to ensure the heat dissipation function of the cooler.
Be cautious when selecting the hydraulic oil tank. Because the oil tank is equipped with a heat dissipation baffle, if its barrier function is poor, the oil will return to the hydraulic system again after the cycle of operation. Therefore, it is necessary to monitor the liquid level in the oil tank in real time to ensure that it is within the normal design. When monitoring, the small arm of the small excavator can be kept vertical to the ground, so that the bucket is not in contact with the ground, and the oil tank level can be used to check the oil volume. When the oil tank is cooled, its liquid level must be between the center line and the lower line, and when the oil is hot, its liquid level must be lower than the upper line. If the lower line of the liquid level is lower, the hydraulic oil must be replenished in time.
Analysis of heating defects in the hydraulic system of small excavators
(2) Reasonable use of components of the hydraulic system
1) When using the small excavator system, it is necessary to ensure that the pressure accepted by its operation is within a reasonable design. This is because if the pressure exceeds a certain design, the oil temperature in the hydraulic system will rise, affecting its normal operation; if the pressure of the system is too low, the setting value of the pressure of opening the overflow valve is relatively low, which will have different degrees of influence on its unloading effect, which may easily lead to repeated opening of the valve body, resulting in repeated overflow and heating of the system. Therefore, the pressure accepted by different valve bodies in the hydraulic system should be reasonably set.
2) Different uses of hydraulic components in the hydraulic system will cause different degrees of wear to them, so pay attention to their use and repair. If the wear of the components exceeds a certain scale and affects their use function, system leakage and oil temperature rise will occur, which will then cause system defects and the system will start to heat up. There are two types of leakage in the hydraulic system: internal leakage and external leakage. The main influencing factor of the increase in system oil temperature is still its internal leakage. If the leakage is serious, the output pressure of the pump body will be seriously insufficient, and the output power will not meet its requirements. Therefore, it is necessary to use its parts reasonably and conduct regular inspections and replacements to reduce the possibility of system leakage. When replacing the hydraulic oil, the return oil filter element check valve should be fully inspected every time to prevent it from getting stuck.
4 In the use of small excavators, the control of the hydraulic system has always been paid attention to, which is related to the hydraulic system itself. The use of the hydraulic system improves the function of the product, effectively reduces its energy consumption, and can adapt to the function of the host machine, which is also a great improvement in its control function. However, the hydraulic system of small excavators often has heating defects, which greatly affects its normal operation and has different degrees of impact on the surrounding environment. Therefore, it is necessary to make a diversified analysis of the factors affecting its heating, and to study them, improve the hydraulic system technology, and reduce the possibility of its heating defects.
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contact # : +86 158 6218 2088
email : sales@bonovogroup.com
1 The effect of heating of the hydraulic system of a small excavator
In the process of using a small excavator, the heating of its hydraulic system is a defect phenomenon that occurs frequently, and its analysis and treatment process is relatively complicated. At the beginning of the defect, all functions work normally, but as the oil temperature in the hydraulic system continues to rise, some obvious abnormal problems will appear after one hour of continuous operation, affecting the normal operation of the hydraulic system, making its internal organizational system work slowly and the excavation force insufficient. Therefore, if the heating defect of the small excavator is not dealt with in time, it will have a great impact: ① The viscosity of the oil decreases, increasing the possibility of leakage, promoting more severe heating of the system, and thus a vicious cycle; ② The oxidation rate of the oil is accelerated, and the small holes of the components are blocked, affecting the use of hydraulic components; ③ It is easy to cause hose aging and rubber seal failure; ④ It increases the wear of the oil pump and hydraulic valve parts, and even causes them to be scrapped and unable to be used.
Analysis of heating defects in the hydraulic system of small excavators
2 Factors affecting heating of the hydraulic system of small excavators
1) Unreasonable system structure and unqualified parts
Irrational system structure, improper operation or unqualified parts of the hydraulic system, such as too thin hydraulic oil pipelines, too small tank volume, hydraulic oil pipelines that cannot be 90°, and poor heat dissipation of the tank during operation, will cause heating of the hydraulic system of the excavator.
2) Low viscosity of hydraulic oil
The hydraulic oil in the hydraulic system of a small excavator is viscous. When its temperature rises, the viscosity of the hydraulic oil will decrease. At this time, it is easy to cause system leakage, affecting the operating efficiency of the small excavator. And the hydraulic oil has a lubricating effect. If its viscosity decreases, the protective film it forms on the surface of the system will become thinner, the effect will decrease, and the wear will be aggravated when it moves on its surface, and the utilization rate of the components will also decrease. In addition, unreasonable use and repair of the hydraulic system will increase the possibility of system heating. For example, if the operator refuels blindly, the oil level in the shock absorber box will be too high, and the system may heat up at this time; unreasonable repairs to the hydraulic system will affect the operation of the system and may also cause the system to heat up.
3 Ways to deal with the heating defect of the hydraulic system of small excavators
(1) Strengthen the setting of its heat dissipation device
The setting of the heat dissipation device in the small excavator is the guarantee for the normal operation of the hydraulic system of the small excavator. The cooler can be arranged in the hydraulic system, and the ventilation function of the cooler must be ensured. The heat dissipation pipeline of the cooler and the belt of the fan should be checked in time to enhance its heat dissipation function and clean it at any time to ensure the heat dissipation function of the cooler.
Be cautious when selecting the hydraulic oil tank. Because the oil tank is equipped with a heat dissipation baffle, if its barrier function is poor, the oil will return to the hydraulic system again after the cycle of operation. Therefore, it is necessary to monitor the liquid level in the oil tank in real time to ensure that it is within the normal design. When monitoring, the small arm of the small excavator can be kept vertical to the ground, so that the bucket is not in contact with the ground, and the oil tank level can be used to check the oil volume. When the oil tank is cooled, its liquid level must be between the center line and the lower line, and when the oil is hot, its liquid level must be lower than the upper line. If the lower line of the liquid level is lower, the hydraulic oil must be replenished in time.
Analysis of heating defects in the hydraulic system of small excavators
(2) Reasonable use of components of the hydraulic system
1) When using the small excavator system, it is necessary to ensure that the pressure accepted by its operation is within a reasonable design. This is because if the pressure exceeds a certain design, the oil temperature in the hydraulic system will rise, affecting its normal operation; if the pressure of the system is too low, the setting value of the pressure of opening the overflow valve is relatively low, which will have different degrees of influence on its unloading effect, which may easily lead to repeated opening of the valve body, resulting in repeated overflow and heating of the system. Therefore, the pressure accepted by different valve bodies in the hydraulic system should be reasonably set.
2) Different uses of hydraulic components in the hydraulic system will cause different degrees of wear to them, so pay attention to their use and repair. If the wear of the components exceeds a certain scale and affects their use function, system leakage and oil temperature rise will occur, which will then cause system defects and the system will start to heat up. There are two types of leakage in the hydraulic system: internal leakage and external leakage. The main influencing factor of the increase in system oil temperature is still its internal leakage. If the leakage is serious, the output pressure of the pump body will be seriously insufficient, and the output power will not meet its requirements. Therefore, it is necessary to use its parts reasonably and conduct regular inspections and replacements to reduce the possibility of system leakage. When replacing the hydraulic oil, the return oil filter element check valve should be fully inspected every time to prevent it from getting stuck.
4 In the use of small excavators, the control of the hydraulic system has always been paid attention to, which is related to the hydraulic system itself. The use of the hydraulic system improves the function of the product, effectively reduces its energy consumption, and can adapt to the function of the host machine, which is also a great improvement in its control function. However, the hydraulic system of small excavators often has heating defects, which greatly affects its normal operation and has different degrees of impact on the surrounding environment. Therefore, it is necessary to make a diversified analysis of the factors affecting its heating, and to study them, improve the hydraulic system technology, and reduce the possibility of its heating defects.
Mini crawler excavator，Mini crawler excavator attachments，Excavator attachments，Crawler excavator，Mini excavator purchase
Choose BONOVO for high-quality, customizable brush cutters for skid steers with fast delivery. Contact us today to discover how our superior products can enhance your land management tasks!
for more info just visit our website at www.bonovogroup.com
contact # : +86 158 6218 2088
email : sales@bonovogroup.com