I replied to a post in the 40s section describing a pressure pot I made out of a propane tank. After a few PMs, I decided to post the how to here, it's really simple, and i can fill the oil in both diffs and my transfer case and transmission in under 20 minutes, no pumping, minimal mess...I built it originally to fill outdrives on my boat, works fantastic...
Here goes
What you need:
-a propane tank, in decent shape, I bead blasted mine, valve removed, FILL IT WITH WATER AND DRAIN IT
-a 3/4" ball valve
-a 4" nipple that fits the 3/4" ball valve, and also fits the propane tank valve outlet
-a 1/2" ball valve
-10" of pipe threaded at one end, that fits the 1/2" ball valve,
-a hose barb that fits into the 1/2" ball valve
-5 feet of hose that fits the barb
-a new valve stem from a rim
ok, take the valve stem, determine what size it fits, drill a hole in the top to the tank to fit.
drill a hole to fit the 1/2" pipe, also in the top of the tank, hog it out so it goes straght down.
cut a 45 bevel off the end of the 10" pipe, slip into the hole all the way to the bottom of the tank, and weld.
onto the 10" pipe, attach 1/2 ball valve, then barb into the valve, then hose onto barb.
put the 4" nipple into the tank's valve hole, add the 3/4" ball valve here...
install the valve stem.
see the pic below, open the blue 3/4 valve, fill to 3/4 full, close blue valve, check red 1/2 valve closed, pressurize tank, open red 1/2 valve, air pushes oil down and back up the pipe, and out thru the hose...
Here goes
What you need:
-a propane tank, in decent shape, I bead blasted mine, valve removed, FILL IT WITH WATER AND DRAIN IT
-a 3/4" ball valve
-a 4" nipple that fits the 3/4" ball valve, and also fits the propane tank valve outlet
-a 1/2" ball valve
-10" of pipe threaded at one end, that fits the 1/2" ball valve,
-a hose barb that fits into the 1/2" ball valve
-5 feet of hose that fits the barb
-a new valve stem from a rim
ok, take the valve stem, determine what size it fits, drill a hole in the top to the tank to fit.
drill a hole to fit the 1/2" pipe, also in the top of the tank, hog it out so it goes straght down.
cut a 45 bevel off the end of the 10" pipe, slip into the hole all the way to the bottom of the tank, and weld.
onto the 10" pipe, attach 1/2 ball valve, then barb into the valve, then hose onto barb.
put the 4" nipple into the tank's valve hole, add the 3/4" ball valve here...
install the valve stem.
see the pic below, open the blue 3/4 valve, fill to 3/4 full, close blue valve, check red 1/2 valve closed, pressurize tank, open red 1/2 valve, air pushes oil down and back up the pipe, and out thru the hose...
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