Intro: Vacuum Powered Liquid Extractor!
I always wanted an easier means to remove liquid when I'm doing car maintenance. By this I mean;
-removing power steering fluid.
-removing transmission oil. https://www.instructables.com/id/Vacuum-Extraction-...
-bleeding brakes. https://www.instructables.com/id/Vacuum-Bleeding-th...
Here is how I made this very convenient tool in less than half hour.
Step 1: The Liquid Air Separator.
This old water pump filter I decided to convert into my liquid air separator. The clear jar is perfect to let me see how much stuff I have removed. Also, it's pressure construction is important for the upcoming steps.
Step 2: Making an Output Connection Port.
I used a spare washing machine water hose to make an output connection. I cut a 2 inch length of hose. A 1/4inch nipple I threaded into the hose segment with the help of my spanner. I pushed it into the out port of the filter. The fit was nice and snug!
Step 3: The Input or Suction Connection.
Another hose segment I pushed into the IN Port of the filter. Using 3/8inch clear vinyl tubing, I pushed one end into the hose. The other end will be used to suck liquid.
Step 4: The Vacuum Source.
My trusty hvac vacuum pump will be used to generate the vacuum. Eventually I may have a dedicated 12volt vacuum pump to do the job but for now I will use the equipment I already have. I used a spare vacuum hose to couple the pump to the diy port on my liquid catch bottle.
Step 5: Testing!
I used a bucket of water to do a quick test. Turning my vacuum pump on, the end of the vinyl tube sucked greedily at my finger. Good!
Putting the tube into the bucket now, the water was sucked rapidly! The level shown in the pic was pulled in less than 10 seconds!
The top can easily be unscrewed for me to dump the liquid!
In reality the viscous liquids I intend to remove will take longer to extract but I'm anxious for field trials.
Step 6: Completion!
I'm pleased with the performance of my liquid catch bottle! To make it portable I put a carry strap secured via cable ties. I can't wait to bleed brakes now!