The vacuum trap method is def easier than pumping the mityvac. Cool idea
with fire extinguisher! I have an old welch duo seal and i bleed brakes the
same way with two brass nipples and some sealing tape thru the top of a
spaghetti jar lid.
I bought 2 of the fire extinguishers for the kids to have water
fights with. I figgered they could fill them with water and
pressurize with the compressor. They never thought it was a good
idea. So when I started thinking about a sucker I took one out.
Cut off the nozzle. Found out the hose would jam into the dipstick
tube as is. Halfway there. THen how to get a vacuum in it? The HF
vacuum dealie was on sale. A short piece copper tube with a flare
nut, a short piece of hose, and an air chuck hooks it to the valve
stem on the fire extinguisher.
Works to suck out the oil,
Works to store oil
Works to pump used oil into jug/barrell or whatever you use to recycle the oil.
HF vacuum dealie:
http://www.harborfreight.com/air-vacuum-pump-with-r134a-and-r12-connectors-96677.html
Mine are the older model.
Later I made another one to leave at my daughter's house. No more
crawling on the ground there, except for flex joints, trans filter
changes etc. Too bad they never made a system so simple to change
trans oil and filter.
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