Oil extractors

Joined
Jun 11, 2003
Messages
752
Location
Hedgesville, WV
I have a gripe and a small amount of info and looking for any other input. For a long time I have been shopping for a larger oil extractor. Up until now I have been using my small Harbor Freight brake bleeder hand vacuum pump that I rigged up to a 1 qt pickle jar to give me a bit more volume before emptying. I mostly used it to drain the master cylinder and power steering pump and did 1 oil change on the lawn mower that does not have a drain plug. A few months ago I tried using it to change the transmission fluid but after 4 qts I got pretty tired of pumping and started shopping. There are a ton of testimonials out there of how fast they pump the oil out or how slow but I cannot find a single person or review that actually measured the amount of vacuum their extractor developed. Maybe I am missing something but this seems to be a critical piece of information for a vacuum pump. Even the manufacturer does not state this info in their spec sheets, and I could not find another person asking this question. How do you really compare 1 pump against another before you buy. The time it takes is governed by the vacuum and the size of the tube and the length and the head and the viscosity (hot or cold). So without all that info being the same the only relevant spec would be the vacuum. So with my rant over the info I have is that my Harbor Freight hand pump develops a max of 28 inHG and the pump I ended up with OEMTOOLS 5.3 liter hand pump develops 24 inHG. It seems to have a check valve that stops any more vacuum from developing. I just hooked it to my small hand pump so both readings are from the same gauge. I was interested in seeing how much vacuum but also if it had any leaks before my return period ended. It didnt.
So has anyone else bothered or cared to check theirs. I would really be interested if anyone has done this with one that works off an air compressor.
 
Joined
Dec 19, 2013
Messages
5,939
Location
Fort Worth, Texas
Good air powered one's consume a huge amount of air volume, Anything below a 60 gallon will negatively affect the performance of the tool unless you have a abnormally high CFM pump vs storage capacity compressor?
 

JHZR2

Staff member
Joined
Dec 14, 2002
Messages
46,800
Location
New Jersey
I had a topsider long ago. Didn’t last. I got a plastic one from tractor supply that has been great. Recently I bought a big vertical tank unit.

I think the key is how coarse or fine a vacuum it can pull. High max vac without pulling quantity of air isn’t very helpful. Volume is important.
 
Joined
Jun 2, 2014
Messages
5,268
Location
Ca.
I have a gripe and a small amount of info and looking for any other input. For a long time I have been shopping for a larger oil extractor. Up until now I have been using my small Harbor Freight brake bleeder hand vacuum pump that I rigged up to a 1 qt pickle jar to give me a bit more volume before emptying. I mostly used it to drain the master cylinder and power steering pump and did 1 oil change on the lawn mower that does not have a drain plug. A few months ago I tried using it to change the transmission fluid but after 4 qts I got pretty tired of pumping and started shopping. There are a ton of testimonials out there of how fast they pump the oil out or how slow but I cannot find a single person or review that actually measured the amount of vacuum their extractor developed. Maybe I am missing something but this seems to be a critical piece of information for a vacuum pump. Even the manufacturer does not state this info in their spec sheets, and I could not find another person asking this question. How do you really compare 1 pump against another before you buy. The time it takes is governed by the vacuum and the size of the tube and the length and the head and the viscosity (hot or cold). So without all that info being the same the only relevant spec would be the vacuum. So with my rant over the info I have is that my Harbor Freight hand pump develops a max of 28 inHG and the pump I ended up with OEMTOOLS 5.3 liter hand pump develops 24 inHG. It seems to have a check valve that stops any more vacuum from developing. I just hooked it to my small hand pump so both readings are from the same gauge. I was interested in seeing how much vacuum but also if it had any leaks before my return period ended. It didnt.
So has anyone else bothered or cared to check theirs. I would really be interested if anyone has done this with one that works off an air compressor.

Had mityvac hand pumps for decades, never bothered to measure how much vacuum it pulled.

Extractions speeds vary with viscosity, temps, sump size, which diameter tubes I'm using.
 
Joined
Jan 9, 2010
Messages
8,348
Location
Los Gatos, CA
I love my MityVac. Just did a TSX power steering service. Sucked the reservoir dry and stabbed the extractor tube into the return line.
Extracted till it pulled air. Poured Honda fluid intot he reservoir until it appeared in the vacuum tube.
Let the reservoir empty and then replaced the return line. Filled the reservoir one last time.
Easy peasey.
 
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