(1) Insufficient pressure or no pressure in the hydraulic system of mixing machinery: when the hydraulic pump can not pump out pressure or the pressure is insufficient, it is mostly caused by the wrong steering of the hydraulic pump or the low speed of the pump. At this time, it is necessary to change the steering of the hydraulic pump or detect whether the transmission system of the hydraulic pump is normal. When the viscosity of the hydraulic oil decreases, the volumetric efficiency of the whole system will decrease. At this time, the hydraulic oil should be replaced to ensure that its viscosity meets the requirements of the system.
(2) Mixing machinery hydraulic system flow is small, no oil: if the hydraulic pump rotates normally, but there is no hydraulic oil output, it is generally caused by less oil in the oil tank, oil suction filter or oil suction tank blockage, compressed air in the oil suction pipe, too high viscosity of hydraulic oil, oil pump can not normally absorb oil and other reasons. In case of the above faults, oil should be added properly and the oil circuit should be cleaned at the same time.
(3) Flow pulsation and pressure fluctuation of hydraulic system of mixing machine: when pulsation or pressure imbalance occurs in the hydraulic system of mixer, it may be caused by air inhalation in the system. At this time, we need to check the fuel tank in time to ensure that there is no foam in the hydraulic fluid. If there is a bubble, we should clean the oil well in time, replace the hydraulic oil, and ensure that there is no leakage in the whole oil circuit.
(4) Mixing machinery hydraulic system operation noise is serious: mixing machinery hydraulic system noise, hydraulic system pipeline, oil pump and other hardware, there are air, air suction and other problems. Timely check the mixing machine oil tank, whether the oil volume is out of range, and the sealing of hydraulic hardware and system connector. It is necessary to reduce the amount of oil, keep the oil in the specified scale of the oil tank, check the loss degree of each sealing part, clean the foreign matters in the oil suction filter or oil suction pipe, adjust the speed of the hydraulic oil pump, replace the hydraulic oil, and preheat the oil.
(5) The operation valve of the hydraulic system of the mixing machine jumps: when the oil is used for a long time and polluted, a large amount of dirt will accumulate in the hardware of the oil pump and control valve, which greatly reduces the operation efficiency of the hydraulic system, and causes damage to the hydraulic hardware, aftertaste of the slide valve, spring deformation and other problems. It is necessary to check and replace its components in time, so as to avoid the problem that the operation valve of the hydraulic system of the mixing machine jumps during the road and bridge construction, which will affect the operation safety.
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