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Home - News - Let you be familiar with the key points of oil seal replacement and prevent installation wear

Let you be familiar with the key points of oil seal replacement and prevent installation wear

October 22, 2021

 

      Do you know how to replace the oil seal? Do you know the main points needed to replace the oil seal

 

in order to install it correctly? Below, the editor of Guangzhou Songka takes the installation of skeleton oil seal

 

as an example to tell you the key points of its replacement!

 

 

 

1. Skeleton oil seal replacement point one

 

In the process of replacing the oil seal, it is sometimes difficult to judge the oil leakage at the oil seal lip and

 

outer circle. In some cases, the engine can be turned off. After the temperature is completely cooled, the oil seal

 

at the suspected leakage point and its surroundings should be washed. After the gasoline is volatilized, spray chalk

 

dust evenly on the leak, restart the engine again and observe, it will be obvious whether it is the oil seal lip and

 

shaft neck leaking or the oil seal and seat hole leaking.

 

 

2. Skeleton oil seal replacement point 2

 

When you want to install the oil seal, pay attention to the direction of its front and rear positions, and the oil seal

 

and the seat hole have an interference fit. In addition, the mechanical strength of rubber is very low, and it is easy to

 

damage the outer ring of the oil seal. Therefore, during installation, you need to align the seat hole and push

 

it in (or pad a flat plate and tap it gently with a hammer). Do not hit hard if it is not aligned. If it is the quality

 

of the oil seal, it should be replaced.

 

During installation, the spring is easy to fall off and the inner ring is easy to flange. Oil should be applied to the

 

matching journal and pushed when rotating to avoid flanging of the inner ring of the blade when the journal is

 

scraped. After installation, carefully check whether the spring is firmly secured. Install in the ring groove and

 

keep the blade in the normal state.

 

3. Key points three of skeleton oil seal replacement

 

In actual use, it is necessary to add lubricating oil for assembly, but if the lubricating oil is too much, insufficient or

 

too thin, the sealing performance of the oil seal will decrease. If the lubricating oil is too thin, it will leak. When the

 

lubricating oil is severely private, it will cause the oil seal to overheat. , Causing sharp wear and even tearing at the

 

cutting edge. When the lubricant is too much, the cooling space of the engine body is relatively reduced and the

 

pressure is increased due to the increase in the running resistance of the crankshaft. Leakage phenomenon.

 

4. Skeleton oil seal replacement point four

 

For an engineering machinery engine to be overhauled, all the oil seals on the body must be replaced in principle,

 

because the aging of the oil seal is often difficult to distinguish with the naked eye. It is a wise choice to replace

 

all the oil seals when the engine is overhauled.

 

5. Replacement point five of bone oil seal

 

When you need to reinstall the body, pay attention to whether the oil seal spring is intact, oil the shaft parts,

 

and install while rotating to prevent damage to the oil seal.

 

6. Key points for replacing the skeleton oil seal

 

The chamfer of the journal or valve seat hole that matches the oil seal should be free of burrs,

 

sharp edges, etc., and trim if necessary.

 

7. Oil seal replacement point seven

 

When measuring the diameter of the edge of the oil seal, you can remove the spring and carefully arrange

 

the oil seal by hand to make the inner ring as flat as possible. The average value can be obtained by a few

 

more positions. When measuring, the force should be appropriate, and the deformation should not affect

 

the measurement.

 

8. Key points for replacement of skeleton oil seal

 

Before installation, carefully check the appearance of the oil seal in accordance with relevant regulations.

 

The lip edge and outer surface of the oil seal must be coated with lubricating oil, and special tools for the oil seal must

 

be used for press fitting. Ensure that the tool is perpendicular to the plane of the body seat hole. The oil seal can be

 

press-fitted to the seat hole in an even and orderly manner, so that it can effectively avoid crooked installation or

 

excessive force damage to the oil seal.