Failure phenomenon:
High oil temperature appears in the excavator operation, which affects the normal operation of the excavator.
Excavator high oil temperature failure impact:
1 Excessive oil temperature will cause thermal deformation of excavator parts, and the system will lose its ability to work in severe cases.
2 The high temperature of excavator oil causes the viscosity of hydraulic oil to decrease, the leakage increases, and the service life of excavator is reduced.
3 Hydraulic oil rises Excavator seals fail, causing oil leakage.
4 As the oil temperature is high, the easily oxidized asphalt and colloid in the hydraulic oil are oxidized, blocking the oil path, resulting in unstable flow of the hydraulic valve and affecting the normal operation of the excavator.
Excavator oil temperature failure phenomenon reason:
1 Excavator hydraulic system design does not meet the specifications.
2 The design of the oil circuit is unreasonable. For example, the diameter of the oil pipe is small, there are many joints, and there are many bending places. The resistance of the hydraulic oil during circulation will increase, resulting in high temperature of the excavator oil.
3 The hydraulic oil used is not suitable.
4 Air has entered the hydraulic system.
Excavator oil temperature failure phenomenon reason:
1 Excavator hydraulic system design does not meet the specifications.
2 The design of the oil circuit is unreasonable. For example, the diameter of the oil pipe is small, there are many joints, and there are many bending places. The resistance of the hydraulic oil during circulation will increase, resulting in high temperature of the excavator oil.
3 The hydraulic oil used is not suitable.
4 Air has entered the hydraulic system.
5 The hydraulic oil used is contaminated.
6 Excavator hydraulic cooling system failure.
7 Wear of excavator parts, such as valve plate wear, plunger wear, reversing valve wear or valve stem gap seal wear, may cause high oil temperature failure of the excavator.
Excavator high oil temperature fault repair:
1 When designing the hydraulic system of the excavator, the design must be reasonable. When designing the oil pipe, the joints should be reduced as much as possible. The complete place and the pipe diameter must be suitable.
2 The daily use of hydraulic oil for excavators must be strictly managed to avoid contamination. The hydraulic oil used must also match the type of excavator.
3 Under normal circumstances, the hydraulic oil of the excavator should be replaced when it is used for more than 1000 hours, and the oil filter should be above 120 mesh.
4 When there is a high oil temperature failure of the excavator, you need to know whether it is caused by a failure of the cooling system. You can directly check whether the radiator of the excavator is faulty? The tightness of the fan belt? How much coolant?
5. There are also parts that should be replaced regularly. The hydraulic pumps and hydraulic motors of imported excavators should be replaced after 5-6 years of use, and the domestic time is relatively short, the time is probably It will be replaced after three years.
