In the whole construction project, the concrete mixer needs to be prevented not only from the damage of structural accessories, but also pay more attention to the state of the hydraulic oil circuit. In view of the black oil phenomenon in the construction project, we summarize the following measures according to the actual operation experience.
Replace the dust seal in time, and it is forbidden to frequently hit the mixer. Black oil in the hydraulic system of the mixer truck may be caused not only by dust, but also by irregular filling of butter. When filling grease, lift the mixer truck and press the steel drill into the piston. Each time, it is only necessary to fill it within half the range of the standard grease gun.
If the steel drill rod is not pressed during the grease filling, the grease will be at the upper limit of the steel drill groove. When the steel drill rod is working, the grease will directly jump to the main oil seal position. With the reciprocating motion of the piston, the grease will be brought into the middle cylinder, and then with the hydraulic oil in the middle cylinder mixed into the hydraulic system of the mixer truck, resulting in abnormal conditions such as deterioration and blackening of the hydraulic oil.
Install oil return filter device to remove external dust. When replacing oil pipes, steel pipes, oil return filter elements and other hydraulic accessories, it is necessary to clean the dust or sundries at the interface before loosening and replacing.
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