I'm still doing my homework but I'm leaning toward the 60gal RDS gravity feed. What (if anything) are you folks using for a filter between the aux tank and main filler?
My buddy at the Ram dealer said one of the first questions on a Cummins engine warranty claim is whether or not an aux fuel tank is in use
Ask your buddy if he would be willing to give you a copy of that.
Cummins literature does mention auxiliary fuel tanks in the FAQ's when it comes to fuel system contamination, but I have never seen an auxiliary fuel tank listed as a straight out warranty claim denial.
No different then most over the roads trucks having two fuel tanks.
I don't use a filter on my tank. Straight flow into the main tank filler pipe, which is then filtered as normal. If you keep your tank closed-capped properly what difference does it make whether the fuel is pumped into the auxiliary tank or frame mounted tank?
I am currently looking for a solenoid to remotely open and close the gravity feed valve from inside the cab.
When you look fo ra solenoid there are several thing sot look for, 100% duty cycle, viton seals (good for diesel) and GRAVITY feed. Gravity feed solenoids work a little different then the standard version. Some solenoids actually require a bit of 'head pressure' to operate, which you don't have with gravity feeds.
This is the current version of the valve I used.
Search text "Electric Solenoid Valve 12-Volt DC 12VDC Viton Seal Water Air Diesel"
https://www.ebay.com/itm/3-8-Electr...ater-Air-Diesel-B21V-/300876957423?rmvSB=true
The solenoid does get hot with use, but after 4 years of use still works fine. I did ask the manufacturer about the heat it generates and they told me it is normal and if it goes bad, that is why they offer replacement coils.
It looks like our '12 just has the one filter at the engine. If I use much more than a strainer between the tanks I'll likely need a pump to move the fuel through it. Without a pump I'll likely lose the use of a good part of the fuel in the aux tank because it won't be able to push the fuel through the filter
Neale, unless you can add a filter that is equal to or better in quality as to what is on the truck already - why bother?
I considered when my truck was new adding the
Dieselsite filtration kit. Just couldn't get past the price so never bothered.
https://heartlandowners.org/showthread.php/46173-Added-an-auxiliary-tank
https://www.ford-trucks.com/forums/1317433-rds-auxiliary-tank-install.html
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I could not get the last 5 + gallons out of the tank.
My tank drains down to the level of the bung welded on the bottom of the tank. Maybe 1/4" of fuel in the tank after use.
That is using a gravity feed capable solenoid.
Granted, the last 10 gallons take longer to drain then the first 10 gallons, but since I use the tank for towing it really doesn't matter.