The role of seal oil spill closed the gap box room, and to prevent dust, sand and dirt intrusion chambers inside, but if installed or used improperly, can easily cause oil leakage, affecting the normal operation of the machine ,75-A burn caused by bearings, broke gear, twist off shaft or other serious problems.
Skeleton from the tight rubber seal in the installation notes
    (1) installation of oil seal, it shall be checked whether the journal surface is too rough, with or without injuries, especially without a long scar along the axis. If the journal surface is too rough, can easily damage the oil seal lip 1:3 or accelerated wear and tear, damage its sealing performance. If the journal surface due to improper disassembly of bludgeoning the more serious injuries, the journal will make the surface of oil seal lip and loose fitting, causing oil leakage. In both cases, you can re-surfacing of the injuries required the Ministry of the journal size lathe turned, or replaced with new axis. If the journal only metal burrs or flash shaft and so on, can rasp grinding flat, to prevent the installation of oil seal oil seal lip injuries.
    (2) Check the oil seal lip with or without breaking, cracking or oil of corrosion damage, if any of these negative phenomena, should be replaced with new oil seal.
    (3) installation of oil seal, in order to prevent the oil seal lip 121 is tensile deformation or scratch damage, to adopt the special tools for installation. Without this tool, can dismount to install: first in the journal as well as shaft position, volume on the hard layer of transparent plastic film (commonly known as cellophane), cast on its surface a little oil into the oil envelope wrapped in plastic film the shaft, even forced to slowly push down to seal the journal, and then out of the plastic film. Note: Do not install the wrong direction lip should be that it points toward the inside for storing oil, a trademark, the side facing the outside of specifications. Because only one-way sealing lip 1:3, if the anti-oil package, it will inevitably cause oil leakage, the seal weakened or failed. Package to avoid distortion or oil stick with a hammer and other tools in the oil seal surface Luanqiao too hard, or cause injury is likely to seal.
    (4) during the installation process, should be maintained oil seal (especially the lip area) and the journal area clean, and pay attention not seal tight spring out from the spring groove. If the spring loose from the tight, elastic weakened, depending on the circumstances of its period cut off both ends of the head and then you can continue to use the solid.
    2. Rubber ring water blocking installation considerations
Cylinder liner for a water blocking circle "O" shaped rubber pieces, mostly circular cross section, compared with the skeleton oil seal, simple structure, neither skeleton nor from the tight spring, relying on their flexibility and rubber elasticity closed. If improperly installed, will make a lot of water jacket cooling water infiltrated in the crankcase, causing oil deterioration, lubrication quality variation, increased engine wear and tear of the moving parts, and even major failure of axle bush-burning, so the installation of water blocking lap should note the following:
    (1) If the water blocking cylinder seal ring groove too deep or too small, so that water blocking ring into the cylinder seal failed after the tank above the curved surface of a certain height, then, can be added in the bottom of the tank seal wrapped around a layer of asbestos rope, coated with water in the calcium-based grease, and then into the water seal trap blocking water tank, and then the body bore cylinder pressure on people.
    (2) If the water blocking cylinder seal ring groove is too thick or too light, water blocking circle above the curved surface after the excessive load, this time not only to liner installation difficulties, but also squeeze squeeze even bad bad rubber seal liner, rubber seal can be abrasive grinding evenly, until it protrudes into the water seal groove height right after the ending. And then coated with grease in the rubber ring can be pressed into the body bore cylinder.
    (3) If the water blocking ring seal groove depth of uneven thickness, or different, after the cylinder fitted with rubber ring protruding uneven level should be carefully examined is the problem of the rubber ring, or seal tank problem, will be deposited parts in question replaced.
    (4) into the cylinder in the rubber water seal trap blocking water trough should be rubber ring and seal tank clean and to avoid impurities in the installation into the dirt. After the cylinder fitted with rubber ring to double-check whether they have twisted off the tank and so muddy. Before installing the cylinder, the cylinder should be removed carefully, down the dirt on the bearing hole Korea, and the next layer of oil coated the surface of bearing holes, and then slowly cylinder pressure on people bearing holes.