How to assemble the shaft sleeve oil seal of a screw air compressor?
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Friends, please help us out: Our factory has a screw air compressor, brand: Kaishan, model: LGJ--6/7； Purchased in 2008, the air compressor developed an oil leakage problem a little over a month ago. The maintenance workers at our factory removed the compressor head by themselves and took off the oil seal on it. Later, I asked the dealer, and he said that the machine head was leaking oil – the oil seal on the shaft sleeve had failed. We purchased the shaft sleeve seal, as shown in the photos: there is a stainless steel shaft sleeve, two seals, one large and one small, as well as a small blue O-ring. After the accessories are purchased, I plan to install them. Here’s the problem: regarding the assembly sequence and direction, both mechanics said they weren’t very sure, and what they said differed significantly from each other. I need some help. Does anyone know that when two seals are installed on a shaft sleeve, which one should be installed first—the larger seal or the smaller one? ? When installing the oil seal, should the stainless steel side of the oil seal face the installer, or should the groove side face the installer?
I’m trying to figure out which bushing the two oil seals should be installed in; the bushings are probably mounted on the shaft. Which O-ring is used for sealing one end of the bushing?
Without a doubt! The two oil seals can be fitted over the shaft sleeves; the key is the order of the two seals as well as their orientation. One side of the oil seal is a stainless steel flat surface, while the other side is a stainless steel groove. They’re different!
It depends on how convenient it is for you to install it. Whether the oil seal faces inward or outward, remember one thing: the lip must always face the side under pressure. Look at the picture
Ignore the groove; just look at the direction of the oil seal. . As for the size, you can check it yourself – there’s a large one and a small one; it’s definitely possible to tell when assembling them. If it can be installed in either orientation, then there should be no problem using it even if it’s installed incorrectly. There are just two seals
::$It seems that relying on the manufacturer is still the most reliable option! We have contacted the dealer, but the dealer was vague! They are in contact with the factory’s technicians again.
Less is more; just get it right. I think what you said is very crucial.
To disassemble it, reverse the process and reinstall it; the method of installing oil seals varies depending on the machine. For this type of dual oil seal, it is generally necessary to install the smaller oil seal first, followed by the larger one, and finally push in the shaft sleeve. It is advisable to apply some glue during installation.
It’s really troublesome! I installed it myself, and it still leaks! :L
Yes! We installed the shaft sleeve first, but it seems that it won’t work! I still need to reinstall it following the order you mentioned.
Apply sealant at the shaft seal housing and grooves； Be sure not to touch the lip edge; apply a little oil when putting it on ； Also, run the machine for a few minutes to allow more contact between the lip of the shaft seal and the shaft sleeve. Sometimes it leaks when it’s at rest, but it doesn’t leak once it’s running.