The individual piston rod is black
1. Check whether there are bump marks on the plating layer of the piston rod, and see if its appearance is damaged.
2. Check whether the outer oil seal is damaged; if so, replace the oil seal without changing the piston rod, because the color of the piston rod will gradually recover.
3.The hydraulic oil deteriorates due to high temperature, and the cylinder discolors due to chemical reasons, which makes the piston rod black.
All piston rods are blackened
1. Confirm whether the original hydraulic oil is used.
2. Whether hydraulic oil is mixed and used, various additives in the oil interact and adhere to the piston rod.
3. In a short period of time, the entire piston rod changes color. Consider whether the high temperature of the hydraulic oil causes oil deterioration and the piston rod turns black.
In addition, during the use of the piston rod, we must also pay attention to protecting its oil seal to avoid collisions on the outside of the piston rod, thereby preventing it from being strained and the plating layer falling off, and shortening the service life.
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