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Converting a 1000g lp tank to diesel

rockyridgefarm

rockyridgefarm

Well-known Member
I bought this propane tank today to convert to diesel. I asked the seller what I should do and he said to vent it and fill it with diesel. It has a drain underneath, and I asked if I should drain it. He said that it is not necessary. Well, being the type to touch the bench with a wet paint sign on it, I decided to drain it. I got mayb a gallon of the stinky stuff out the bottom. Wondering if his advice had been good and I could have diluted it with 1000 gallons of diesel, or if I did the right thing by draining it.

Also, my wife wont let me near her since I got it on my hands...
.
mvphoto56359.jpg
 
You going to just put 50 psi or so air to
it, instead of a pump. Good deal you got
that crap out. I've been told that came
from the inside of hoses used to fill it.
 
The stuff they use to give the LP it's wonderful smell is heaver than the gas, so over the years it'll settled on the bottom of the tank. If it's not under pressure, it's no longer a gas, but rather a mass of s???. Every fill adds more to the bottom accumulated "smell" pot, especially if there's no leaks. It was a good idea to drain it, in MHO.
 
Custom hay baler worked for years ago had 250 on trailer with 12 volt pump. One of the other valves was replaced with sill cock for vent.
 

I had not thought of pressurizing the tank to pump. Is there an advantage of doing that over installing a pump? I was gonna take it to a shop and have them drill and tap a couple 2 inch holes - one for a fill and one for a pump.
 
Make sure you use good filters. There's a bunch of goo in the bottom of that tank, and it isn't all liquid, more like a heavy paste.
 
(quoted from post at 03:15:54 06/11/20)
I had not thought of pressurizing the tank to pump. Is there an advantage of doing that over installing a pump? I was gonna take it to a shop and have them drill and tap a couple 2 inch holes - one for a fill and one for a pump.
Click to expand...


Rocky ridge, you would need to add air pretty frequently in order to transfer the fuel by air pressure. I would think that you will have to install a line from your compressor or at least a bladder tank to hold some charge.
 
I can't see anything wrong with cleaning it out!

Propane is not as clean as it appears. If you've ever had a vaporizer apart, you will see just how nasty it is!

Now how harmful the residue will be to a diesel system is hard to say. But you can bet even though you rinsed it out there will still be some left.

It probably will not be an issue, especially if it readily dissolved in the diesel you rinsed it out with. I would still install a filter/separator though.

I think air pressure would be a good way to move it! Remember, there will have to be a way to vent the tank when filling.
 
It's a good thing you drained that crap out, I would put a couple of gallons of diesel in it and rinse it again! I wouldn't want
anything like that in my injector pump! About using air to push the fuel out, it will work, but if anything goes wrong I would
want a valve right at the tank to shut off. I think an electric pump would be better and safer.
 
I have a 500 gal. One converted to
diesel. The place I bought it from
cleared it of residual propane and cut
the holes I needed. I welded the
fittings on it for fill, and dispense. I
use air pressure to dispense. 10 psi is
plenty. Works great. For greater flow rate I suggest larger hose etc. instead of more air pressure.
 
(quoted from post at 07:15:54 06/11/20)
I had not thought of pressurizing the tank to pump. Is there an advantage of doing that over installing a pump? I was gonna take it to a shop and have them drill and tap a couple 2 inch holes - one for a fill and one for a pump.
Click to expand...

Just cut the holes and weld in threaded tank bungs like this one.
Less than $9 at McMaster Carr.
12555K88p1-c01d-digitall@2x_636616342399401664.png
 
(quoted from post at 06:06:06 06/11/20) I would put a small bung & plug in the bottom of one end/bottom and have a decent tilt down to that end when setting the tank.
Click to expand...

It has a plug in the middle of the bottom. I understand your intent with suggesting putting it on an end, though.
 
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