Eleven problems needing attention in replacing a n

2022-08-21
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Eleven problems should be paid attention to when replacing a new hydraulic pump for construction machinery

eleven problems should be paid attention to when replacing a new hydraulic pump for construction machinery

China Construction machinery information

Guide: pay attention to the discovery of abnormal phenomena at any time: abnormal sounds, vibrations or abnormal signals of the monitoring system must have their reasons. As soon as abnormal phenomena are found, immediately find the circuit diagram and follow the diagram, Carefully observe whether the abnormal phenomenon is caused by a temporary error. Evaluate whether parking is required. All kinds of pressure

pay attention to the discovery of abnormal phenomena at any time: there must be a reason for abnormal sounds, vibrations or abnormal signals of the monitoring system. When an abnormal phenomenon is found, immediately find the circuit diagram, follow the diagram, and carefully observe whether the abnormal phenomenon is caused by a temporary error. Evaluate whether parking is required. For example, pressure, load, temperature, time, starting and stopping all include the reasons for possible abnormal phenomena. At ordinary times, it should be analyzed and discussed item by item

do not load the hydraulic pump immediately after starting: the hydraulic pump must be idled for a period of time (about 10 ~ 30 minutes) after starting. Especially when the temperature is very low, it must go through the warm-up process to make the hydraulic circuit circulate normally before adding load, and confirm the operation condition

observe the change of oil temperature: pay attention to the change of maximum and minimum oil temperature, and find out the relationship between oil temperature and external ambient temperature, so as to know whether the capacity of cooler and oil storage tank are compatible with surrounding conditions and service conditions, and the troubleshooting of cooling system can be followed

pay attention to the noise of the hydraulic pump: the new hydraulic pump has less wear at the initial stage, and is vulnerable to bubbles and dust. Poor lubrication or overloaded service conditions at high temperature will cause adverse consequences, making the hydraulic pump produce abnormal effects

pay attention to the displayed values of gauges: observe the displayed values of the pressure gauge of the hydraulic circuit, the light signal of the pressure switch and other vibration conditions and stability at any time, so as to find out whether the hydraulic circuit works normally as soon as possible

pay attention to the action of the machine (for the modified pump): the hydraulic circuit is not designed properly or the components are poorly manufactured, which is not easy to find in the initial use stage, so special attention should be paid to the action state under various use conditions

pay attention to the adjustment in each valve: fully understand the pressure control valve, flow control valve and direction control valve. 2. The experimental motor can not be used on the brain, and pay special attention to the adjustment range and limit, otherwise the adjustment error will not only damage the machinery, but also pose a threat to safety

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check the status of the filter: the filter in the circuit should be taken out and cleaned regularly, and check the status of the filter and the dirt adsorbed on it, analyze the quality, quantity and size, so as to observe the degree of pollution in the circuit, and even infer the source of pollution

regularly check the changes of hydraulic oil: check and analyze the deterioration, discoloration and pollution of hydraulic oil every one or two months to ensure the normal operation of hydraulic transmission media

pay attention to the leakage of the piping: whether the piping of the hydraulic device is good can be seen after running for a period of time. Check whether there is oil leakage and whether the piping is loose

pay attention to the operation condition within three months of the operation of the new machine: during the operation of the new machine, you should grasp the operation condition, and you can do some simple experimental inspections by yourself, such as the maintenance of machine parts, whether the screws are loose, whether the oil temperature rises abnormally, whether the hydraulic oil deteriorates quickly, and whether the service conditions are in line with the specifications. At this time, the corresponding load is the yield load PS, etc

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