What are the precautions during the installation of electric forklift seals?

by:Staxx     2021-05-15
The function of the forklift seal is to close the gap of oil overflow in the tank chamber and prevent dust, sand and other dirt from entering the tank chamber, but if installed or used improperly, it is easy to cause oil leakage, affecting the normal operation of the machine, and causing burns. Damaged bearings, broken gears, unscrewed drive shafts or other serious failures. The following is a detailed explanation by the electric pallet truck manufacturer: 1. Precautions for the installation of the skeleton self-tightening rubber oil seal:  (1) Before installing the oil seal, check whether the surface of the shaft journal is too rough, whether there are scars, especially whether there is any along the shaft Longer scars in the direction. If the surface of the journal is too rough, it is easy to damage the oil seal or accelerate the wear of the lip, destroying its sealing performance. If the surface of the shaft journal causes serious bludgeoning scars due to improper disassembly and assembly, the oil seal lip and the shaft journal surface will not fit tightly, causing oil leakage. In the above two cases, the scar can be re-turned on the lathe according to the specified journal size after surfacing welding, or replaced with a new shaft. If the shaft journal has only metal burrs or flashing on the shaft head, it can be smoothed with a file to prevent the oil seal lip from being damaged when the oil seal is installed. (2) Check the lip of the oil seal for cracks, cracks or oily corrosion. If there are any such unfavorable phenomena, the oil seal should be replaced with a new one. (3) When installing the skeleton oil seal, in order to prevent the oil seal lip from being stretched, deformed or scratched and damaged, a special installation tool must be used. If you don’t have this tool, you can use the following method to install: first roll a layer of transparent hard plastic film (commonly known as cellophane) on the shaft journal and even the shaft head, apply a little oil on the surface, and cover the oil seal with plastic. On the shaft head of the membrane, slowly push the oil seal to the journal with even force, and then pull out the plastic membrane. Note: Do not install the lip in the wrong direction. It should face the inner side where the oil is stored, and the side with the trademark and specifications should face the outer side. Because the lip can only be sealed in one direction, if the oil seal is reversed, it will inevitably cause oil leakage, weakening of the sealing effect or failure. Avoid crooking the oil seal or banging it on the surface of the oil seal with a hammer or other tools, otherwise it is easy to cause damage to the oil seal. (4) During the installation process, keep the oil seal (especially the lip part) and the shaft neck part clean, and be careful not to make the oil seal self-tightening spring jump out of the spring groove. If the self-tightening spring is slack and the elasticity is weakened, it can be cut off according to the situation, and the two ends can be connected firmly to continue using. 2. Matters needing attention in the installation of rubber water blocking ring The water blocking ring of the cylinder liner is an 'o' shaped rubber piece with a circular cross section. Compared with the skeleton oil seal, the structure is simple, and there is neither a skeleton nor a self-tightening spring. Rely on the flexibility and elasticity of the rubber itself for sealing. If installed improperly, a large amount of cooling water in the water jacket will seep into the crankcase, causing deterioration of engine oil, deterioration of lubrication quality, aggravating the wear of all moving parts of the engine, and even causing major failures such as bush burning and shaft holding. Therefore, when installing the water blocking ring The following items should be noted: (1) If the water blocking ring is too thin or the water seal groove of the cylinder liner is too deep, the water blocking ring cannot be higher than the arc surface after being installed in the water sealing groove of the cylinder liner. Wrap a layer of asbestos rope at the bottom of the water seal groove, apply water-resistant calcium-based grease, and then put the water blocking ring into the water seal groove, and then press the cylinder liner into the body seat hole. (2) If the water blocking ring is too thick or the water seal groove of the cylinder liner is too shallow, after the water blocking ring is installed, the arc surface is too high. At this time, not only the installation of the cylinder liner is difficult, but the rubber water seal may be damaged or even squeezed. For the cylinder liner, the rubber water seal can be evenly polished with emery cloth until it protrudes to a suitable height after being installed in the water seal groove. Then apply grease on the surface of the rubber ring to press the cylinder liner into the body seat hole. (3) If the thickness of the water blocking ring is uneven or the depth of the water seal groove is different, and the rubber ring protrudes unevenly after installing the cylinder liner, you should carefully check whether the problem is the rubber ring or the water seal groove. Replace the problematic part. (4) Before the rubber water blocking ring is inserted into the water seal groove of the cylinder liner, 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 or slipped out. Before installing the cylinder liner, carefully remove the dirt on the upper and lower bearing holes of the cylinder body, and apply a layer of oil on the surface of the lower bearing hole, and then slowly press the cylinder liner into the bearing hole.
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