How to Repair Excavator Hydraulic Pump? How to adjust the pressure of the hydraulic pump of the exca

The maintenance of hydraulic pumps has Wuxi Leming hydraulic equipment. Maintenance methods and measures of hydraulic system 1. Choose the right hydraulic oil Hydraulic oil plays the role of transmitting pressure, lubrication, cooling and sealing in the hydraulic system, and improper selection of hydraulic oil is the main reason for the early failure and durability decline of the hydraulic system. Hydraulic oil should be selected according to the brand specified in the random "Instruction Manual", and when the substitute oil needs to be used under special circumstances, its performance should be the same as that of the original grade.

Different grades of hydraulic oil should not be mixed to prevent chemical reactions and changes in the properties of the hydraulic oil. Dark brown, milky white, and odorous hydraulic fluids are spoiled oils and should not be used. 2. Prevent solid impurities from mixing into the hydraulic system Clean hydraulic oil is the life of the hydraulic system.

There are many precision couples in the hydraulic system, and some have damping holes 、...

Hydraulic pump is a relatively precise hydraulic equipment, it is recommended that non-professionals do not disassemble and repair to avoid greater damage.

Usually, the maintenance of hydraulic pumps requires professional and advanced hydraulic pump performance testing equipment to find out the problem, and after the maintenance and replacement of spare parts, it is also necessary to test again to ensure that the performance is repaired.

Replace the hydraulic pump, excavator dismantling parts, a good choice, short time, fast speed, economical, negative field.

The big arm of the excavator is too strong when it rises. What is the reason for this.

To increase the pressure of the main pump, you need to adjust a main safety valve above the main shunt valve. If you do feel bored at work, you can adjust it, but you must check how much the pressure of the main pump can reach, you adjust it, there will be a danger of bursting pipes when working, and the old excavator will exacerbate some aging hydraulic oil pipe leakage. It is recommended to check the pressure of the main pump before adjusting it.

The pressure of the main pump of small and medium-sized excavators is that the pressure of the main pump of small excavators can only reach 28 30MPa (this is the pressure when leaving the factory).

PC120-6E pressure is not enough how to drop.

The hydraulic pump has abnormal noise or the noise is significantly increased. The oil pressure changes frequently, sometimes normal and sometimes low. When operating, it feels like the movement is sometimes slow, but after a few minutes it can be normal, etc., which is a precursor to damage to the hydraulic pump.

The hydraulic system of the excavator.

It is a combination that organically connects various hydraulic components with pipelines in accordance with the transmission requirements of the excavator working device and various mechanisms. It mainly contains hydraulic fluid.

Tank, main pump, multi-way valve, each pipeline and the cylinder that performs each action.

motors and other components.

Its function is to use oil as the working medium and use the hydraulic pump to transfer the mechanical energy of the engine.

It is converted into hydraulic energy and transmitted, then through hydraulic cylinders and hydraulic motors.

and so on to convert the hydraulic energy back into mechanical energy to realize the various actions of the excavator.

The hydraulic system of the excavator is composed of some basic circuits and auxiliary circuits, which include working circuits, pressure limiting circuits, unloading circuits, buffer circuits, throttling speed regulation and throttling speed limiting circuits, walking speed limiting circuits and pilot valve control circuits, etc.

Its components are mainly composed of working pumps, oil replenishment pumps, pilot control valves, distribution valves, and safety valves.

It is composed of large arm cylinder, small arm cylinder, bucket cylinder, oil tank and related pipelines.

In the working process of the excavator hydraulic system, the hydraulic oil is sucked in by the working pump from the bottom of the oil tank through the oil filter, and the hydraulic oil with a certain pressure is output from the oil pump into a set of parallel distribution valves.

The system limits the total pressure of the whole system through the total safety valve on the main oil circuit, and the safety valve of each group of working oil circuits plays the role of overload protection and oil replenishment respectively to the corresponding oil circuit.

Well, this must be the on-board computer alarm, my one was the "hydraulic oil filter element blocked" alarm, and then suddenly the car body was weak. The movement is very slow. The pressure detected by the computer is also lower than that of other machines.

We opened the hydraulic tank, checked the filters, and found nothing wrong. Due to the limited technology, I didn't dare to open it again, and later someone else came to test it, saying that the big pump had burned.

Find the point of oil leakage, check whether the oil leakage at the interface is caused by the rupture of the oil pipe, and prescribe the right medicine. If the oil pipe is broken, remove it and take it to the place where the oil pipe is pressurized, and replace one directly; If it is an interface, it is very likely that the oil seal is broken, find the oil seal package of this series of excavators, and replace it.

The hydraulic pump drive shaft can not bear radial force and axial force, so it is not allowed to directly install pulleys, gears and sprockets at the end of the shaft, and the drive shaft and pump drive shaft are usually connected with couplings.

If the coaxiality of the pump and the coupling exceeds the standard due to manufacturing reasons, and there is a deviation during assembly, the centrifugal force increases with the increase of the speed of the pump, and the coupling deformation increases, and the deformation increases the centrifugal force. This creates a vicious cycle, which results in vibration and noise, which affects the service life of the pump. In addition, there are influencing factors such as the coupling pin is loose and not fastened in time, and the rubber ring is worn and not replaced in time.