Dual fuel tank filling

[AuroraGirl]

unless absolutely requiring the keep the aux tank on the opposite side of the truck, I would just advocate using a behind the rear axle gas tank And the side of your choice, and piping the filler to your prefered spot (behind the tail light is popular aftermarket place)

This would be able to be purchased with less fab work outside of the work to install tank and filler , but commercially sold parts, and also gives you good choice in size + placements
and it gives you the desired outcome , filler on the same side.

 

[AuroraGirl]

I want to install a dual tank in my truck but don't like the idea of filling both from one port because I want to be able to carry diesel in one tank and gas in the other. I am about 25 miles from Sams and don't go that way often enough to fill up the cars but I could bring home gas in the second tank and drop it in a storage tank for the cars and then still use it for diesel when on long trips.

you use your tank for BOTH and doint do anything to clean out when going to gas from diesel?

 

[DoubleDingo]

you use your tank for BOTH and doint do anything to clean out when going to gas from diesel?

I doubt a tiny bit of diesel will affect the square, and a tiny bit of gasoline probably won't hurt the diesel either. Not ideal, but I wouldn't sweat it when it would be drops of diesel/gasoline mixed with gallons of diesel/gasoline.

 

[AuroraGirl]

I doubt a tiny bit of diesel will affect the square, and a tiny bit of gasoline probably won't hurt the diesel either. Not ideal, but I wouldn't sweat it when it would be drops of diesel/gasoline mixed with gallons of diesel/gasoline.

i thought he was using the gasoline for his other, presumably modern small vehicles, and his truck was a diesel?

 

[AuroraGirl]

my bad I had the situation you want to avoid (gas in diesel) switched around. Still, if he wants to use his aux tank for diesel or gas i would incorporate a way to drain it fully and , in a way, rinse out. and then the lines flushed if any pulled through

 

[bucket]

I doubt a tiny bit of diesel will affect the square, and a tiny bit of gasoline probably won't hurt the diesel either. Not ideal, but I wouldn't sweat it when it would be drops of diesel/gasoline mixed with gallons of diesel/gasoline.

Most tanks will still have a decent amount of fuel in the bottom of the tank that the siphon tube won't reach.

 

[bucket]

If you just want to fill up the cars at home, imho, just spend a few bucks up front and keep it simple. Just buy a 110 gal "transfer" tank from TSC or the like that is designed to fit easily in a pickup bed, along with a 12v transfer pump. You can get the kit that comes with the siphon tube, the filler hose and also an auto-shutoff nozzle. Fill it up at the gas station, drive it home and pump it into your cars and/or storage drum.

Or just drive the cars to the gas station and get fuel as needed.

 

[Ricko1966]

I think the whole things irrelevant anyway he added in later that it's an m1010 box truck. Even if he had a c/k a second tank would only be 16 or 20 gallons. Buy 3x5 gallon Jerry cans and call it a day.

 

[DoubleDingo]

I think the whole things irrelevant anyway he added in later that it's an m1010 box truck. Even if he had a c/k a second tank would only be 16 or 20 gallons. Buy 3x5 gallon Jerry cans and call it a day.

^^^^^THIS^^^^^

 

[squaredeal91]

I just found this and what i say is irrelevant now but found it interesting what op was asking in the beginning about an auxiliary tank filling the main tank. I personally don't think it's a good idea but I drove a 1999 3500 flatbed chevy for the lumber yard I worked at and it had 2 tanks but one would automatically fill the other on its own. No tank selector switch.

 

[bucket]

I just found this and what i say is irrelevant now but found it interesting what op was asking in the beginning about an auxiliary tank filling the main tank. I personally don't think it's a good idea but I drove a 1999 3500 flatbed chevy for the lumber yard I worked at and it had 2 tanks but one would automatically fill the other on its own. No tank selector switch.

The later 4500 and 5500 rigs are like that too. Eventually they quit working, the fuel doesn't transfer from the rear tank and you end up out of fuel, lol. Something to do with the PCM. If you jumper the fuel pump relay, it will run the transfer pump so you can get fuel back into the main tank.

 

[squaredeal91]

The later 4500 and 5500 rigs are like that too. Eventually they quit working, the fuel doesn't transfer from the rear tank and you end up out of fuel, lol. Something to do with the PCM. If you jumper the fuel pump relay, it will run the transfer pump so you can get fuel back into the main tank.

That's exactly what happened. I had to fix it lol

 

[bucket]

That's exactly what happened. I had to fix it lol

The 4500 that I drive often, the main fuel sender quit working too, so the gauge doesn't work. I wired a dash switch to the relay so I can manually transfer. If towing, I run about 130 miles, then turn on the transfer pump for 22 minutes. That pumps another 13 gallons into the main tank and I fill up again around 220 miles to be safe. If not towing, I can safely stretch that out to 170 and 300. That's interstate travel.

 

[AuroraGirl]

If you just want to fill up the cars at home, imho, just spend a few bucks up front and keep it simple. Just buy a 110 gal "transfer" tank from TSC or the like that is designed to fit easily in a pickup bed, along with a 12v transfer pump. You can get the kit that comes with the siphon tube, the filler hose and also an auto-shutoff nozzle. Fill it up at the gas station, drive it home and pump it into your cars and/or storage drum.

Or just drive the cars to the gas station and get fuel as needed.

I was considering mounting a 20 gallon tank on my garbage trailer( you know which one, the one with the topper and that has a 14b ff) I was considering mounting it on that and then mounting a 12v transfer pump ansd then a small battery. Tempting, but i don t have enough gas needs to do that yet. However. I may consider it in the future if lifting 2gallon cans becomes hard enough for my grandma so she can fuel up the lawn mower. For now, she has no trouble doing that so I just get 4 6gallon cans filled at the same time, and I also get a 2 or 3 gallon small can filled at the same time. With better spouts and vents installed from a kit I get from menards, they are immsensly superior to the junk you can get that spills everywhere. If i put the large diameter spout on I can empty the 6 gallons FAST. Too fast for anyything I fill lol.

My grandpa on my dads side had very much appreciated the 12v pump I got him for fueling his diesel tractor needs , and I have the same pump on my shelf I can use for gas if need be.

Circling back to the idea I floated, I suppose if I put a functional sending unit (2 port of course) in the tank and did that, I could simmply use a hose with a valve on the end, and lower the end of the hose below the tank , and then use a battery filling bulb to start a siphon. The trailer sits higher than most things I fill. Anything it doesnt, could just fill a gas can which would then fill that.
pic for height reference
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[AuroraGirl]

The 4500 that I drive often, the main fuel sender quit working too, so the gauge doesn't work. I wired a dash switch to the relay so I can manually transfer. If towing, I run about 130 miles, then turn on the transfer pump for 22 minutes. That pumps another 13 gallons into the main tank and I fill up again around 220 miles to be safe. If not towing, I can safely stretch that out to 170 and 300. That's interstate travel.

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Diagnosing dual tank balance module

Anyone with dual tanks having problems with fuel gauge or the automated balance flow system this may help. This module is located by the front (main) lift pump. Slightly toward the rear of vehicle along the frame rail. On top of this module is a fuel pump balance relay, it turns the rear...

www.thetruckstop.us

If you ever wanted to diag the issue