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2020
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6 bad habits cause the newly replaced oil seal to leak; quickly check if you are doing the same!
Why do the newly replaced oil seals always fail quickly? Oil seals are inconspicuous among engine parts, but their replacement frequency is relatively high. Although the price of oil seals is not expensive, frequent replacements still cause work delays.
Why do newly replaced oil seals always fail quickly?
Oil seals are inconspicuous among engine parts, but their replacement frequency is relatively high. Although oil seals are not expensive, frequent replacements still cause work delays.
I wonder if fellow mechanics have noticed that some owners rarely replace oil seals throughout the year, while others replace them very frequently. Is it due to differences in oil seal quality, or are there other tricks?
Generally, cheap oil seals are unreliable in quality. I remind you to try to use original parts, which guarantee compatibility and quality. Spending a bit more is better than dealing with oil leaks, and frequent replacements waste more time and money.
(Perkins Original Oil Seal)
If the oil seal quality is not the issue causing oil leaks, it might be that the outer oil seal (commonly called the front oil seal) is damaged; or the cylinder itself has internal leakage and pressure loss, such as the common case of excavator arm dropping. This internal leakage indicates damage to the inner oil seal (commonly called the rear oil seal).
So why do some owners' oil seals always fail quickly?
Check if any of these 6 bad habits apply.
1. When installing the oil seal, not paying attention to cleaning the installation area leads to poor sealing. Experienced technicians always remove burrs from the oil seal mating surface chamfer before installation. This small detail greatly reduces the chance of oil seal damage.
2. When replacing the oil seal, not inspecting the cylinder for damage and directly replacing it. It is recommended to carefully check the cylinder for scratches or gouges before replacing the oil seal. If present, they must be properly handled; otherwise, each piston rod reciprocation will increase wear on even a new oil seal, leading to premature failure.
3. Excessive hydraulic system pressure can cause oil seal deformation. Simply put, the system pressure exceeds the oil seal's sealing limit, causing deformation or even breaking the oil seal into pieces under high-pressure hydraulic oil impact.
4. Contaminants, impurities, dust, and fine particles in the hydraulic oil easily cause oil seal wear, eventually leading to complete failure and replacement.
5. High hydraulic oil temperature needs little explanation. Countless cases each year show accelerated oil seal aging due to high oil temperature, necessitating replacement. If high oil temperature is confirmed as the root cause of oil seal damage, the owner should promptly repair it!
6. Long-term purchase and installation of non-original oil seals or oil seals with unguaranteed quality results in very short seal life and poor sealing performance. Oil leaks and other issues are inevitable.
(Article sourced from the internet)
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