Making A Fridge Compressor Into A Vacuum Pump

Step 2 Maintainance

first things first. Clean all the pieces of the unit with a rag and some cleaner.

On the side of the compressor there is a diagram that makes it pretty straight forward what you are dealing with. There are the three tubes: In, Out, and Process.

Air comes in. Air goes out. Process is for the oil.

As I had heard so much about oil spilling out and mine did not I was a little concerned that the unit may not have any in it. I cut the sealed end off the unit with the pipe cutter, leaving it as long as possible. I then turned the unit upside down so the pipe drained into a collection dish. there was a good amount of oil in the unit, but it looked pretty dirty compared to new oil. It looked like a golden motor oil, where a new compressor oil is a water clear oil.

I marked the level of the oil on the container where the old oil rose to and stored this oil in another container for disposal. I then filled the first container to mark I had made, plus about 50ml more. I did not get a proper measurement, but will estimate a total of 250ml was put back into the compressor via a large syringe which extended into the process tube.

This tube then had the end squeezed down and soldered tight.

Comments

[mobolised]

It depends on what refrigerant the compressor is running on, probaly R22 and there for it needs a heavier oil which is a thick and colden but if it is R407 it should run on 3MA oil which is ligher.