1. Air intrusion
The solution is usually to set the exhaust device on the hydraulic cylinder for exhaust. Another common method is to make the actuator reciprocate several times in a fast full stroke after driving.
2. The hydraulic pump or hydraulic motor is of poor quality
The solution is, of course, to choose a high-quality hydraulic pump or hydraulic motor and engine. Others should be repaired and maintained on time. For example, if the tooth profile accuracy (accuracy) of the gear is low, the gear should be ground to meet the requirements of the contact surface; If the pump has trapped oil, the triangular groove of the oil distribution plate should be corrected to eliminate the trapped oil; if the axial space of the hydraulic pump is too large and the oil delivery volume is insufficient, it should be repaired to make the axial space within the allowable range; the hydraulic pump is selected If not, it should be replaced immediately.
3. The adjustment of the reversing valve is improper, so that the spool of the reversing valve (subordinate to the valve body) moves too fast, which constitutes a reversing shock, resulting in noise and oscillation. The structural principle, disassembly and installation method, fault diagnosis and elimination method of the maintenance excavator, especially the common and typical fault diagnosis and elimination method in use, and the disassembly and assembly of the excavator parts.
Solution: If the reversing valve used is a hydraulic reversing valve, the saving elements in the control oil circuit should be adjusted to make the reversing smooth and without impact; by changing the natural frequency of the pipeline system, change the position of the control valve or add it appropriately. The accumulator can prevent vibration and noise. Excavator repairs Excavator repairs Slow action, weak heat engine, high temperature, car jam, uncoordinated movements, hydraulic pump, valve computer inspection, excavator repair engine burning oil, large lower exhaust, machine overhaul and other fault repairs.
4. The relief valve is unstable.
Solution: Clean and unclog the nipple in time; check the overflow valve, and repair or replace it in time if it is found to be damaged.
5. Mechanical oscillation
Solution: The long oil pipe should be separated and separated from the machine tool wall, and the supporting pipe clamp should be added appropriately; the installation accuracy (precision) of the motor and hydraulic pump should be adjusted; the coupling should be re-installed to ensure that the coaxiality is less than 0.1mm, etc . The structural principle, disassembly and installation method, fault diagnosis and elimination method of the maintenance excavator excavator, especially the general and typical fault diagnosis and elimination method in use, and the disassembly and assembly of the excavator parts.