Help with fuel transfer valve

[speediq99]

Hello,

I just bought an RDS tank. It is gravity filled. It will go in a 2022 Ram 3500. Apparently,RAM decided not to put a gas cap on these trucks so you have to manually fill the tank (open valve) and close it when gauge is full. It sounds like a pain in the neck.

I was told a motorized ball valve could be installed to control the filling of the tank from inside so I don't have to manually and physically pull over to start and stop.

Can you share how you solved this problem?

Thank you

MC

[jdc1]

Why not just put an electric in-line fuel pump in? Pretty simple. Just add a switch at the dash. Probably cost under $50 in materials.

[Gdetrailer]

eHoefler wrote:
The fuel flapper/ball/whatever it is in the fuel neck can seep/leek when over filled. Ask me how I know. I would put some kind of shut off, electric solenoid valve or like to keep from over filling.

X2!

Common complaint on gassers. With capless systems on gassers as time goes on, dirt, grime eventually builds up on the filler door and gasket leading to the dreaded Evap system "slight" leak code and light.

Handling Diesel is even a dirtier more grimy affair so I suspect leakage may be even a bigger problem with them.. But most won't know since the Diesels do not have a evap system test..

Common fix that works is to replace the capless filler neck with a standard filler neck with removable cap..

Motorized valves are out there but they add in a motor control circuit board and some sort of spring return to shut the valve when powered off.. Solenoids by their nature also use a spring to snap the valve shut when not powered.. Both versions can be prone to mechanical or electrical failure.

I would go with manual fill valve for mere simplicity whenever possible. You HAVE to eventually stop somewhere for rest stops and meals, just open the valve and transfer some fuel while you are taking a break..

That is what I do with my gasser, I carry a 15 gallon landscaper tank and use a electric fuel pump and hose to manually transfer to the vehicle tank..

[Dave_H_M]

Just put a veton 12 volt normally closed fuel valve in the line. Hook it up to 12 volts with the switch in the cab to open it. You can open or close it based on your fuel gauge. My such valve has been working flawlessly for years. Aux tank needs a vent, cap or otherwise.

[Grit_dog]

speediq99 wrote:
I was told that because the 2022 Ram 3500 doesn't have a fuel cap, fuel spills out even with the check valve in place. I don't see how but apparently it does.

It sounds like the mechanized ball valve may be an overkill. Perhaps a simpler solenoid would work better. It will be nice to leave the manual shutoff valve open, use the solenoid to control the aux tank remotely and let the check valve keep main tank from overflowing. I am just a little confused with the no gas cap situation and what it means.

MC

Grit dog wrote:
All you need is the tee for the fuel filler hose with a check valve in it. They’re sold by the fuel tank mfgs as “kits.” Gravity feed, 100% hands off and super simple.

No, it has nothing to do with having a gas cap or not.
I guess wiring in an electric valve with a solenoid that is plumbed into essentially the same piece is less complicated? (because you’d still want a check valve unless you like systems that are completely reliant on the operator never making an error)
And of course, a manual shutoff on the slip tank.

[eHoefler]

The fuel flapper/ball/whatever it is in the fuel neck can seep/leek when over filled. Ask me how I know. I would put some kind of shut off, electric solenoid valve or like to keep from over filling.

[southernsky]

You can purchase a kit with a ball valve in it that stops the fuel when tank is full. I have one on my 2019 Ram and it works great, no problems so far. Also have a manual valve at the tank should there be a problem.

linky

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[Bionic_Man]

Couldn’t you just use the manual shut off and leave it closed until you need it? That’s to say when your fuel gauge shows something below 1/2 you open it when you stop for another reason?

If you open it with half of the oem tank remaining, you could almost certainly drive the rest of the day and with the rate of fill vs the rate of burn it would take at least a couple hours to get the oem tank back to full.

[speediq99]

I was told that because the 2022 Ram 3500 doesn't have a fuel cap, fuel spills out even with the check valve in place. I don't see how but apparently it does.

It sounds like the mechanized ball valve may be an overkill. Perhaps a simpler solenoid would work better. It will be nice to leave the manual shutoff valve open, use the solenoid to control the aux tank remotely and let the check valve keep main tank from overflowing. I am just a little confused with the no gas cap situation and what it means.

MC

Grit dog wrote:
All you need is the tee for the fuel filler hose with a check valve in it. They’re sold by the fuel tank mfgs as “kits.” Gravity feed, 100% hands off and super simple.

[Grit_dog]

All you need is the tee for the fuel filler hose with a check valve in it. They’re sold by the fuel tank mfgs as “kits.” Gravity feed, 100% hands off and super simple.

[pianotuna]

MC,

I had such a device on my class c diesel. It would stick. Leaving me stranded--with LOTS of fuel.

I don't recommend it.