Installation and use of excavator oil seal

The small excavator oil seal is an important part of the lubrication system seal. It can not only prevent dust and impurities from entering the lubrication system, but also prevent the leakage of lubricating oil, so as to ensure the normal operation of the lubrication system.

Matters needing attention when installing and using

How to install it correctly

1. When installing the excavator oil seal, do not knock with a hammer or pry it with a screwdriver. The journal where the oil seal is installed must have corresponding chamfers, and trim the burrs to avoid scratching the lip when installing the oil seal.

2. When installing the oil seal, apply some oil on the journal, and use a suitable special tool to gently press the oil seal in to prevent the oil seal from being deformed. Once the oil seal lip flanging is found, the oil seal must be removed and re-installed.

3. When the oil seal is installed at the position with the key, the key should be removed first and then the oil seal should be installed.

4. When the elasticity of the excavator oil seal is insufficient or the lip is worn, the spring ring of the oil seal can be shortened and re-installed, or the two ends of the spring ring of the oil seal can be overlapped one more time to increase the elasticity of the oil seal spring, thereby increasing the oil seal lip The pressure on the journal improves the sealing performance of the oil seal.

5. When installing the oil seal, apply oil or lubricating oil, and round the shaft end and shoulder of the oil seal.

6. When installing the oil seal, be sure to make the lip end of the oil seal face the side of the oil to be sealed, and avoid reverse assembly of the oil seal.

7. When the oil seal is inserted into the seat hole, a special tool should be used to push the oil seal to prevent the oil seal from being skewed.

8. Various measures should be taken to prevent damage to the oil seal lip at the threads, keyways, splines, etc. where the oil seal lip passes, and special tools should be used to assemble the excavator oil seal.

How to use fair

1. Avoid over-speed operation of diesel engine or drastic changes in speed. All kinds of excavator oil seal have a specified linear speed. Exceeding the speed will increase the temperature of the oil seal lip, accelerate the aging of the rubber, and accelerate the wear of the lip. Frequent changes in rotational speed will destroy the lubricating oil film on the boundary of the lip, making the lip in direct contact with the journal and accelerating the wear of the lip.

2. Clean and qualified lubricating oil should be used. If there are impurities in the oil, it will not only accelerate the wear of the lip and the journal, but also destroy the surface tension of the oil film, resulting in oil leakage from the oil seal. Some diggers add a regenerated oil or mixed oil to the diesel engine. For diesel engines using this oil, the oil leakage of the crankshaft excavator oil seal is particularly serious. Because the viscosity of this oil is too low, a sealing oil film cannot be formed at all.

3. The air filter must be kept in good technical condition, otherwise, after the dust in the air enters the cylinder, on the one hand, it will accelerate the wear of the cylinder and the piston ring, and on the other hand, the lubricating oil will flow into the oil pan along the cylinder wall to contaminate the oil, causing The wear of the oil seal leads to oil leakage.