Many owners have complained about the discoloration of the oil cylinder, which is stuck to the oil cylinder like a piece of dog skin plaster.

The problem is especially serious for the elderly! What is more puzzling is that there are many reasons for this fault, and many owners are not sure what is causing it.

Of course, some friends think that the discoloration of the oil cylinder has a great relationship with the quality of the oil cylinder, but it is not!

There are many reasons for the discoloration of the oil cylinder, but it has little to do with the quality. Today Oil cylinder manufacturer Let's talk about the causes and solutions of the oil cylinder discoloration!

The common oil cylinder discoloration is not the chemical reaction of the oil cylinder itself, but the formation of a colored film on the surface of the oil cylinder, and this film will have a color transition and change.

Generally speaking, it is light blue at the beginning, and then the color will gradually deepen over time, turning into blue purple. If it cannot be handled properly or not handled in time, it will become black.

1、 Reasons for discoloration of oil cylinder:

1. Large temperature difference inside and outside the oil cylinder

Generally speaking, if the machine is operated for a long time in the area with large temperature difference between day and night, or in the northern cold region, the oil cylinder will suffer several times of temperature difference, which will lead to the discoloration of the oil cylinder.

In short, Hydraulic system The temperature of will increase with the working time, so the external temperature difference or the temperature is low, so such a sharp temperature difference will cause the cylinder rod to change color.

2. The quality of hydraulic oil is too poor

The poor quality of the hydraulic oil will not only cause serious discoloration of the oil cylinder, but also have a huge impact on the hydraulic system, This also has a lot to do with the mentality that some of the owners are cheap.

Especially for the second mobile phone purchased, the owner will greatly discount the level of care in maintenance, so in order to save money, the hydraulic oil that is far from the original brand and quality has been replaced.

The proportion of chemicals added in different brands of hydraulic oil is far from the same. Long term mixing of different brands of hydraulic oil with different quality can easily cause discoloration of the oil cylinder, or even cylinder scuffing!

3. Impurities on cylinder rod surface

The cause of impurities on the cylinder rod surface is closely related to the construction conditions of the excavator, especially in areas with serious dust and flying sand,

Hydraulic cylinder The cylinder rod of the cylinder needs to be in direct contact with the external environment frequently, so the more and more dust attached to the cylinder will also cause discoloration of the cylinder.

If it turns blue, it may be caused by the additives in the oil seal and hydraulic oil adhering to the cylinder rod under high temperature.

If it turns black, it may be because the lead contained in the spray in the wear sleeve is attached to the cylinder rod.

4. There are fine lines on the cylinder rod surface

Of course, we cannot completely rule out the quality problem of the cylinder rod itself. If the cylinder has been replaced due to maintenance or other reasons,

However, there are problems such as uneven heating on the surface of the oil cylinder itself during the electroplating process, resulting in some cracks and fine lines that are difficult to find by the naked eye. In this case, the oil cylinder will also change color.

2、 Solution for discoloration of oil cylinder

1. If you find that there is a small piece of blue on the surface of the oil cylinder that is very subtle and difficult to observe during the construction process, you can postpone the treatment, and after a period of time, the subtle blue will disappear automatically.

2. If the discoloration of the oil cylinder has become very serious, the possibility of the discoloration disappearing by itself is almost zero, so it is necessary to replace the oil seal and wear sleeve in time. In addition, it is also necessary to thoroughly check the hydraulic system and timely troubleshoot the high temperature problem of the hydraulic oil!

3. If it is observed that the first half of the bucket cylinder is discolored, the reason is that the hydraulic oil temperature is too high. Therefore, each machine mainly focuses on cleaning the radiator and reducing the hydraulic oil temperature.

4. If the oil cylinder discoloration problem has never occurred before the machine replaced other brands of hydraulic oil, then it can be determined that the reason for the oil cylinder discoloration problem in the later period is the hydraulic oil, so immediately replace the hydraulic oil with the same brand and model as the original one, and do not cause greater impact on the hydraulic system due to small losses!

5. If the discoloration is caused by slight cracks on the oil cylinder, it is the quality problem of the oil cylinder itself. If possible, coordinate with the manufacturer's agent to solve the problem, or purchase and replace the oil cylinder by yourself.

In a word, there are many reasons for the discoloration of oil cylinders. After excluding external environmental factors, most of them are due to mistakes and carelessness in maintenance, service and use!

Moreover, the discoloration of the oil cylinder is just a small warning of the failure of the hydraulic system, so once you find a problem, you should start to check from all aspects as soon as possible, and never delay to make the failure irreparable!