Generally, the rubber O-rings on the market have a circular cross-section. Compared with the skeleton oil seal, the structure is relatively simple. There is neither a skeleton nor a self-tightening spring. It relies on the flexibility and resilience of the rubber material itself to seal. If the installation is improper, there is a risk of leakage. If it is sealed in the fuel tank, it may cause the deterioration of the oil, the deterioration of the lubrication quality, aggravate the wear of the moving parts of the engine, and even cause major failures such as bearing damage. The following points should be noted when circling:
Precautions:
(1) If the waterproof ring is too thin or the water seal groove of the cylinder liner is too deep, so that the waterproof ring cannot be higher than the arc surface after being installed in the water seal groove of the cylinder liner, then we can wrap a layer at the bottom of the water seal groove Asbestos rope, coated with water-resistant calcium-based grease, then put the waterproof ring into the water seal groove, and then press the cylinder liner tightly.
(2) If the waterproof ring is too thick or the water seal groove of the cylinder liner is too shallow, and it is too high above the arc surface after installation, it will not only be difficult to install the cylinder liner, but also the rubber water seal will be squeezed or even smashed or deformed to protrude. , the rubber water seal can be evenly polished with emery cloth until it protrudes to a suitable height after being loaded into the water seal groove. Then apply grease on the surface of the rubber ring, and the cylinder liner can be pressed on the hole position.
(3) If the thickness of the waterproof ring is uneven or the depth of the water seal groove is different, and the rubber ring protrudes unevenly after being installed on the cylinder liner, you should carefully check whether it is the problem of the rubber ring or the water seal groove. Replace the defective part with a new one.
(4) Before the rubber waterproof ring is sealed, the rubber ring and the water seal groove should be cleaned, and impurities and dirt should be avoided during installation. After the rubber ring is installed on the cylinder liner, carefully check whether it is twisted and slipped. Before installing the cylinder liner, carefully remove the dirt on the upper and lower bearing holes of the cylinder block, and apply a layer of oil on the surface of the lower bearing hole, and then slowly press the cylinder liner to complete the sealing.