Cleaning a mighty vac.

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Feb 3, 2020
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Location
Great Lakes
For those of you with mighty vacs do you just dump out the extracted fluids or do you do some sort of rinse and clean?

If you do rinse and clean what is your process?
 
Dump it out. My fluid extractors often have warnings or cautions about the use of solvents in their literature. I don't want issues with the seals and parts, so, extract the fluid, dump it out, and leave it at that.
 
I begin cleaning the Mityvac 7201 with brake clean through plastic tube. I know I'm doing against the mfg's warning, but it's been OK for the last 5+ years. I only use my Mityvac 7201 for fluid transfers (diff & T-case) since it doesn't work (extraction) for any of my cars.
 
I have never cleaned our MityVac; I just flip the switch and pump the oil into a recycle container.
I would love to use it as a filler for differentials, etc, but that would require a through cleaning.

I love my MityVac; never thought I would even use one...
 
I don't clean mine as I only use it to extract with.

For filling diffs and stuff, I have a funnel I attached to a half inch OD hose which I run through the wheel well so I can pour standing up.
 
I cleaned mine by siphoning some gas thru it after I used it to siphon out the old power steering fluid in my Blazer. Because if I ever siphon brake fluid I dont want it to get contaminated.
 
I drain it completely after each use. This includes all the lines. My Schwaben has warnings not to use cleaning fluids.
 
I just dump, never been cleaned other than wiping down the outside.
 
Which Mightyvac?

I have the metal handheld and do wipe it down after each use, if brake fluid gets in the cylinder, I disassemble, clean with water, dry and use silicone grease on the seal. Its ~20 years old and still functional.
 
Yesterday I purchased a fluid extractor from Harbor Freight that is similar to the Mighty Vac. The initial intent was to draw off some oil in a vehicle and replace it with HPL EC30. The secondary purpose is to pull oil samples for the lab without actually draining the oil. A case in point here is my 2017 C-Max Energi with 12K miles on the oil vs. a 20K recommended OCI. In any event I am wondering how to clean it well enough to avoid cross contamination of samples. Suggestions I have found online thus far include the following:
  • Warm soapy water. Dawn and Simple Green were each mentioned a few times.
  • Brakeleen was mentioned
  • Denatured alcohol was mentioned
  • Acetone was mentioned
  • Several references combined either alcohol or acetone followed by the hot soapy water treatment
I would welcome any personal experience from those of you using something like this to draw samples.
 
I've never cleaned mine beyond sloshing spent oil around to get some of the junk off the bottom. I feel like taking samples is not a good use for this tool as you'll never get it clean enough to take non-contaminated samples without ruining the seals.
 
I get as much of the fluid as I can out of it. Then wash it out with Simple Green and water. I have mine for about seven or so years with no problems from cleaning it that way.
 
Pull a sample with one of these. Use new line to avoid contamination.

Oil Analysis Sampling Pump - Accurate Oil Extraction of Various Engine Oil
https://a.co/d/ibGkS5g

Use the Mityvac to remove oil for disposal.
Thanks. I'll have to look at that vs the cost of solvents. Pulling samples was a secondary consideration and I am reaching the point where there is little left to learn from UOAs where the manufacturer's recommendation isn't exceeded. A UOA costs about the same as an oil change on a little four banger, so why bother?
 
Yesterday I purchased a fluid extractor from Harbor Freight that is similar to the Mighty Vac. The initial intent was to draw off some oil in a vehicle and replace it with HPL EC30. The secondary purpose is to pull oil samples for the lab without actually draining the oil. A case in point here is my 2017 C-Max Energi with 12K miles on the oil vs. a 20K recommended OCI. In any event I am wondering how to clean it well enough to avoid cross contamination of samples. Suggestions I have found online thus far include the following:
  • Warm soapy water. Dawn and Simple Green were each mentioned a few times.
  • Brakeleen was mentioned
  • Denatured alcohol was mentioned
  • Acetone was mentioned
  • Several references combined either alcohol or acetone followed by the hot soapy water treatment
I would welcome any personal experience from those of you using something like this to draw samples.
I would get a normal oil sample pump if you need to pull samples between oil changes. You use new tubing and sample container for reach sample and almost no oil touches the pump if you take the sample properly.
 
Pull a sample with one of these. Use new line to avoid contamination.

Oil Analysis Sampling Pump - Accurate Oil Extraction of Various Engine Oil
https://a.co/d/ibGkS5g

Use the Mityvac to remove oil for disposal.
I bought one of these on Amazon. It didn't come with the tubing needed to reach the sump. The instructions are printed in a two point font that I need to use a magnifying glass to read. It seems that it will accept tubing from 3/16 to 5/16-inch. That's a pretty broad range. What size and type of tubing do you suggest?
 
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