Taboos in construction machinery maintenance—Indiscriminate use of butter

Butter is a commonly used grease in the repair of construction machinery, which can play a role in lubrication and sealing. Therefore, some repairmen will apply a layer of butter on the cylinder gasket when installing it, thinking that this can increase the sealing of the diesel engine. As everyone knows, doing so will affect the performance of the diesel engine.

The cylinder gasket is the most important seal between the diesel engine cylinder block and cylinder head. It can not only seal the high temperature and high pressure gas generated in the cylinder, but also seal the cooling water and lubricating oil in the cylinder head and cylinder body. Therefore, in When disassembling and installing the cylinder gasket, pay special attention to its sealing quality.

If you apply butter on the cylinder gasket during installation, when the cylinder head bolts are tightened, part of the butter will be squeezed into the cylinder water passage and oil passage. When the cylinder is operating, part of the butter left between the cylinder gasket will flow out due to the high temperature. When the cylinder is burned, the other part remains on the joint surface of the cylinder block and the cylinder head, causing gaps between the cylinder gasket, the cylinder head and the plane of the body. High-temperature and high-pressure gas can easily impact the cylinder gasket from here, destroying the cylinder gasket and causing leakage. gas.

In addition, when butter is exposed to high temperature for a long time, it will also produce carbon deposits, causing premature aging and deterioration of the cylinder gasket. Therefore do not apply butter when installing the head gasket.

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