Cheaper Jeeper
Full Access Member
BigRigTech, I think that if I was going to build an air pressure operated tank to push the oil through the filter, I'd use a 55 gallon steel drum - or at least one of the 25 gallon drums. A 55 gallon drum won't stand up to much vacuum, but they'll handle 30 or 40 PSI of pressure with no problems. The problem with a 9 gallon tank is that you have to have some air volume in the tank too, not just pressure - unless you want to have to keep pumping it up every few minutes. If you're starting with a 9 gallon tank and leaving a gallon or two empty as your air pressure reservior, you'll only be able to process 7-8 gallons at a time.
With the drum, you could lay it on its side with the 1" vent bung closest to the floor, and a pipe to your filter head(s) screwed into it. The 2" bung would be near the top, and if you installed a 90* elbow to a short piece of pipe sticking straight up in that bung you could use it as the fill port. Fill it with oil through the 2" pipe, and then have a pipe cap with a rubber gasket inside to screw onto the top of the fill pipe to make it airtight.
Just add something as simple as a tire valve to pump in your air pressure and viola', you'd be in business. You could even put the tire valve in the 2" pipe cap to keep installing it really simple.
Shorthair, when I said the gear oil was too thick, I meant by itself. Naturally you are right that any petroleum product can be used if it is thinned down enough. Heck, I suppose you could even use axle grease if you dissolve it in enough gasoline, diesel, or other thinner petroleum liquid.
With the drum, you could lay it on its side with the 1" vent bung closest to the floor, and a pipe to your filter head(s) screwed into it. The 2" bung would be near the top, and if you installed a 90* elbow to a short piece of pipe sticking straight up in that bung you could use it as the fill port. Fill it with oil through the 2" pipe, and then have a pipe cap with a rubber gasket inside to screw onto the top of the fill pipe to make it airtight.
Just add something as simple as a tire valve to pump in your air pressure and viola', you'd be in business. You could even put the tire valve in the 2" pipe cap to keep installing it really simple.
Shorthair, when I said the gear oil was too thick, I meant by itself. Naturally you are right that any petroleum product can be used if it is thinned down enough. Heck, I suppose you could even use axle grease if you dissolve it in enough gasoline, diesel, or other thinner petroleum liquid.
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