There are many types of washers, different sizes and thicknesses, different materials, and different roles. Now the editor introduces the role of several commonly used washers and installation precautions.
Copper Skin Asbestos Mat
The copper asbestos pad has the characteristics of high pressure resistance and high temperature resistance, and it is used in engine cylinder pads. Before using copper-coated asbestos pads, the dirt or sand on the clean joint surface must be removed first. Note that the copper-coated asbestos pad should face the cylinder head to prevent air leakage. The copper skin asbestos pad must not be folded hard during storage and installation, but should be kept intact and sufficiently flexible. If it is found to be damaged or used for too long without flexibility, it should be replaced in time.
There are two uses for it. One is to increase the tightness and prevent oil leakage; the other is to adjust the gap between components. The parts that use paper pads cannot be increased or decreased at will. For example, the paper pad between each side cover of the diesel pump is used to adjust the fuel supply time. The thickness of the gasket is 0.1 mm. For each increase and decrease of the gasket by 0.1 mm, the oil supply angle of the flywheel corresponds Change 1.7 degrees. The axial gap between the crank pad and the crank shaft is also achieved by adjusting the paper pad between the side cover at the end of the flywheel and the body. If the paper pad is damaged, it should be replaced in time to prevent oil leakage.
Aluminum flat pad
Aluminum flat pads have certain toughness, and can be used at the joints of diesel and oil pipelines. The aluminum flat pad should be checked for dents or cracks on the flat surface before installation, otherwise it will cause air to be sucked into the oil leakage pipe, which will not only cause waste of oil, affect the power of the engine, but also cause the burnt tile to hold the shaft due to insufficient oil supply. Wait for the failure to occur.
Cork mats have certain toughness and are generally used between the water tank, the engine oil pan and the body. The cork mat has a soft texture and good sealing performance, and can reduce vibration, collision and wear of components. The weakness is crunchy and brittle. When making cork mats, you should pay attention to drilling first and then cutting, so that it is not easy to damage. During installation, scrape the debris from the joint surface and spread butter on both sides of the cork mat to increase its sealing performance. When tightening the bolts, tighten the fixing bolts evenly and diagonally.
The rubber pad is made of two kinds of raw materials, one is a gasket made of non-oil-resistant materials for sealing the air, such as the gasket used on the air filter housing; the other is a component made of oil-resistant materials Gaskets, such as rubber pads on both ends of the diesel oil filter. It should be noted that the use of oil-resistant rubber pads can replace non-oil-resistant rubber pads, and non-oil-resistant rubber pads cannot replace oil-resistant rubber pads. In the long-term use of the rubber pad, if it is found that its hardening loses its elasticity, it should be replaced in time to avoid wear and tear of the components.