Methods to reduce the failure rate of vacuum oil filter

Quality indicators of lubricating oil for vacuum oil filter:

1. Viscosity: 

This is a very important point. This problem is generally ignored. The viscosity of the oil replaced by the injection molding manufacturer is almost qualified, and there will be no change after 5-8 years. There are many impurities suspended in the lubricating oil, especially those ultra-fine particles, which make the lubricating oil feel dirty and exceed the standard. This is a big problem, but it can be solved. I will talk about it later.

3. Water: 

It is also a big problem, which is bigger than impurities. There is also an emulsification part and a free water part. I will talk about it later.

4. Acidity:

 It will corrode the sealing ring, etc. It is difficult to solve, but it can be prevented. As long as the lubricating oil temperature is below 50 degrees during normal use and there is no water, it can be avoided.

5. Pour point, freezing point, lightning: 

Basically, the oil used in injection molding and die-casting equipment does not need to be considered too much.

6. Additives: 

It is nothing more than anti-wear additives, antioxidants, defoamers, anti-emulsifiers, etc. Generally speaking, additives will be consumed continuously, but generally, they can be used for at least 5-8 years.

Before you begin, check the following:

a) Check that the oil pump shaft turns freely. If the oil pump is stuck, it is likely that foreign matter has entered the pump and is jamming the gears/screws. This needs to be corrected immediately.

b) If the oil pump turns, but is very hard to turn, it is likely that the packing on the shaft has dried a little after the oil pump was installed with the sealing cover. In this case, loosen the two set screws a few times and continue to loosen by hand until the oil pump turns freely.

Note: The oil pump should not turn completely freely, but there should be a slight resistance to movement after the sealing cover is installed. If it is still difficult to adjust the set screws, tap the oil pump with a soft hammer to prevent the parts inside the oil pump from pressing against each other during assembly.