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02-02-2021, 08:46 AM
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#21
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Senior Member
Join Date: Oct 2016
Location: "Murvil, TN
Posts: 2,212
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Quote:
Originally Posted by jim1
Hi I just wanted to let you know I was told to use Loctite 567 sealant with PTFE or something comparable on the diesel fuel tank and line fittings and no leaks. Do not use teflon tape the frayed pieces can come off and raise hell with you fuel system, pumps injectors etc. Also recommended for gas systems. Just a heads up. Good luck! I used a RDS fuel tank with the gravity feed and It works great.
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That's true....here is a link to what I use....
https://www.amazon.com/dp/B008HPVEP0...v_ov_lig_dp_it
__________________
2016 F350 King Ranch Crew Cab Dually Diesel 4x4
2018 Grand Design Momentum 394M
2023 Suzuki GSX-S1000GT+
Excessive payload capacity is a wonderful thing
"If it ain't Fast....It ain't Fun"
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02-02-2021, 01:29 PM
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#22
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Senior Member
Join Date: Jul 2013
Location: Liberty, Texas
Posts: 5,034
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Quote:
Originally Posted by jim1
Hi I just wanted to let you know I was told to use Loctite 567 sealant with PTFE or something comparable on the diesel fuel tank and line fittings and no leaks. Do not use teflon tape the frayed pieces can come off and raise hell with you fuel system, pumps injectors etc. Also recommended for gas systems. Just a heads up. Good luck! I used a RDS fuel tank with the gravity feed and It works great.
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Yep, in my past life we had to bird dog pipefitters about tape on lube oil systems.
Also I would put a simple in line filter on the outlet of the tank, and keep a spare.
__________________
2018 Ram 3500 Laramie CC DRW LWB 4X4 Cummins Aisin 3.73
Reese Goosebox 20K
2018 Heartland Landmark 365 Oshkosh
2008 Bigfoot 25C9.4 LB Cabover
2023 CanAm Defender SXS
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02-03-2021, 10:31 AM
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#23
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Member
Join Date: Jan 2013
Location: Cleveland
Posts: 98
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I’ve got the 65 gallon shown above. Use drip feed with an inline filter on my 2019 Ram Turbo Cummins H/O. I’ve used the same tank and setup on 3 different trucks since 1999. But going from one manufacture to another you may have a different outside diameter on the hose you splice in. Has worked great. As far as the C/G the weight is kind of in the middle of your axles on my 1 ton duality. I don’t know any difference with the trailer on. But when it comes off it if the tank is empty it will jar your teeth out.
__________________
2015 Chevy Crew Cab 3500
Duramax/Allison Tran.
2013 Raptor 332 Toy Hauler
TrailAir Tri-Glide
2 Honda ATV's for climbing
mountains & getting muddy.
Traveling Partners: Dozer & Zeus
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02-03-2021, 03:00 PM
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#24
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Senior Member
Join Date: Apr 2015
Location: nm
Posts: 1,833
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My 2013 I took the filler neck off with 3 screws 1 clamp and drilled a hoe for 3/8 brass 90 fitting and brazed it to the filler tank neck . When I traded it off for the 1 ton the dealer swapped everything over . I never cut a hose . I recently added the water separator filter.
__________________
2018 1 ton 4x4 c.c standard bed GMC Denali
Anderson ultimate hitch
2015 311 Impact Fusion toy hauler
2018 Milwaukee 8 FLRTU roadglide glide ultra
2018 800 Z force spot BUGGY.
500 watts of solar enough power for boon docking.
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02-04-2021, 06:59 AM
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#25
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Senior Member
Join Date: Aug 2013
Location: Tucson
Posts: 822
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We have a 90 gallon RDS tank - use the gravity feed system and included an in-line filter on the tank to truck fuel line. Carry a spare filter. No problems to date.
Our tank does not include a "pump" and I wanted to have a backup (to the gravity feed) as well as being able to help a friend who might be running low on diesel on one of our camping trips. So I bought one of these: I haven't actually used it other than to check the pump runs when connected to the battery, but I'll have it available if I ever need it:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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02-04-2021, 08:30 AM
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#26
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Senior Member
Join Date: Oct 2016
Location: "Murvil, TN
Posts: 2,212
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Quote:
Originally Posted by LewisB
We have a 90 gallon RDS tank - use the gravity feed system and included an in-line filter on the tank to truck fuel line. Carry a spare filter. No problems to date.
Our tank does not include a "pump" and I wanted to have a backup (to the gravity feed) as well as being able to help a friend who might be running low on diesel on one of our camping trips. So I bought one of these: I haven't actually used it other than to check the pump runs when connected to the battery, but I'll have it available if I ever need it:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Probably a pretty good idea unless you already have a permanently mounted pump system like I do. Thanks for sharing this.
__________________
2016 F350 King Ranch Crew Cab Dually Diesel 4x4
2018 Grand Design Momentum 394M
2023 Suzuki GSX-S1000GT+
Excessive payload capacity is a wonderful thing
"If it ain't Fast....It ain't Fun"
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02-07-2021, 08:55 AM
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#27
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Senior Member
Join Date: Jan 2020
Location: Hartford AL
Posts: 439
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Quote:
Originally Posted by xrated
d.....
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The Ram kit is similar. I have the RDS 51g that started out in an F-250, then the 2019 Ram 3500 SRW now to the 2020 Ram DRW. I use the drip method to fill. How fast depends on what you are driving, and what, if any, you are towing. With the F-250 driving not towing it took the onboard tank about 45 minutes to go from 1/4 tank to full. With the Ram 3500 SRW it kept pace with the fuel consumption while towing the Raptor 356 in the sig line and over a days drive added fuel quantity to the onboard tank. IAW gained ground. No experience with the Ram DRW yet towing and transferring. The check valve in the filler neck stops flow into the onboard when it's full. Actually fuller than you can with at a fuel station. LewisB, I do like that portable transfer pump and may get one so I can "steal" fuel from the truck for the tractor at home.
JRTGH your explanation for weight and balance for planes is a good one and simple enough for our applications. I flew helicopters for a living and we used charts before the days of computer calculations. For tanks shaped like the 2 tiered one, using fuel would shift the CG fore/aft and the charts reflected that. Fortunately our fuel was all centerline mounted, no wing/pod tanks, so lateral CG wasn't affected. KISS when figuring aux fuel for a particular application in RV use.
__________________
2021 Omni SX32
2012 Crusader 355BHQ (girl friends)
2020 Ram 1500 Laramie 4WD, toad
2019 Harley Davidson Heritage Classic 114 (the toy)
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02-07-2021, 09:16 AM
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#28
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Junior Member
Join Date: Nov 2013
Location: Idaho
Posts: 26
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I had a Titan 65 gallon replacement fuel tank in my 6.7L Ford. It worked great and no loss of bed space. $200 per fill up was enough 🙄.
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02-07-2021, 09:22 AM
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#29
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Senior Member
Join Date: Jan 2020
Location: Hartford AL
Posts: 439
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Quote:
Originally Posted by idcruiserman
I had a Titan 65 gallon replacement fuel tank in my 6.7L Ford. It worked great and no loss of bed space. $200 per fill up was enough 🙄.
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Yes fuel sticker shock is a fact. My DRW has an onboard tank with 50g and the aux 51G, about 46 usable/practical. If I'm low paying for 85+g dies get your attention. But I can plan my stops where the $$$ is to my benefit, not forced because it's what I have to buy.
__________________
2021 Omni SX32
2012 Crusader 355BHQ (girl friends)
2020 Ram 1500 Laramie 4WD, toad
2019 Harley Davidson Heritage Classic 114 (the toy)
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02-07-2021, 09:24 AM
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#30
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Junior Member
Join Date: Aug 2020
Location: Spring
Posts: 2
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You can calculate the weight distribution. It is the proportion of the distance of the center of the tank to the distance of the length between the wheels. For example, if the distance between the tanks is 10 feet and the tank is 3 feet behind the front wheels, then 70% (10-3)/10 is on the front tires and 30% is on the back tires.
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02-07-2021, 06:58 PM
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#31
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Member
Join Date: Aug 2020
Location: Blossburg
Posts: 39
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I had a 100 gal and as far as weight distribution between axles it wasn’t much but it put me over gross for pulling my Montana 381th. That’s in a 2012 F350 SD 7.7 L diesel
__________________
Goliath-goes 2020 keystone high country 381TH
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02-08-2021, 02:02 PM
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#32
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Senior Member
Join Date: Nov 2014
Location: Naples,Fl
Posts: 110
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If you run gravity feed system dot requires a shut off valve in line . The valve must be closed when the vehicle is in operation on the road. If you get stopped and the valve is open you will be finned. I suggest you go the pump route. To be legal. If you are the cause of a fire in an accident you probably will be liable
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02-08-2021, 04:32 PM
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#33
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Senior Member
Join Date: Oct 2016
Location: "Murvil, TN
Posts: 2,212
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Quote:
Originally Posted by skmct
If you run gravity feed system dot requires a shut off valve in line . The valve must be closed when the vehicle is in operation on the road. If you get stopped and the valve is open you will be finned. I suggest you go the pump route. To be legal. If you are the cause of a fire in an accident you probably will be liable
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Source of that statement please?.....the one about the valve being closed when the vehicle is in operation. I doubt that is true.
__________________
2016 F350 King Ranch Crew Cab Dually Diesel 4x4
2018 Grand Design Momentum 394M
2023 Suzuki GSX-S1000GT+
Excessive payload capacity is a wonderful thing
"If it ain't Fast....It ain't Fun"
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02-08-2021, 05:07 PM
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#34
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,996
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Quote:
Originally Posted by skmct
If you run gravity feed system dot requires a shut off valve in line . The valve must be closed when the vehicle is in operation on the road. If you get stopped and the valve is open you will be finned. I suggest you go the pump route. To be legal. If you are the cause of a fire in an accident you probably will be liable
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Quote:
Originally Posted by xrated
Source of that statement please?.....the one about the valve being closed when the vehicle is in operation. I doubt that is true.
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It may be true on commercial vehicles, but private vehicles used to tow a private RV ?? I can't imagine that rule applies to RV'ers towing with a "in bed fuel tank". I'd also like to see the "applicability rules" that make it mandatory for private vehicles.
__________________
John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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02-08-2021, 08:15 PM
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#35
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Senior Member
Join Date: Oct 2016
Location: "Murvil, TN
Posts: 2,212
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Quote:
Originally Posted by JRTJH
It may be true on commercial vehicles, but private vehicles used to tow a private RV ?? I can't imagine that rule applies to RV'ers towing with a "in bed fuel tank". I'd also like to see the "applicability rules" that make it mandatory for private vehicles.
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John, the more I read about this, the more I think that this is just bad info. There apparently is some verbiage about it being illegal to do..IF....the tank is hooked directly to the carburetor or injectors. Aux tank to main tank is fine.
__________________
2016 F350 King Ranch Crew Cab Dually Diesel 4x4
2018 Grand Design Momentum 394M
2023 Suzuki GSX-S1000GT+
Excessive payload capacity is a wonderful thing
"If it ain't Fast....It ain't Fun"
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02-09-2021, 03:15 AM
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#36
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Senior Member
Join Date: Aug 2012
Location: Waco, Tx
Posts: 5,457
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Quote:
Originally Posted by xrated
Source of that statement please?.....the one about the valve being closed when the vehicle is in operation. I doubt that is true.
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The only requirement that I know of is a rollover valve. I think the information about the closed valve comes from the same tank company that states in all their ads that gravity feeds are illegal.. and they are if feeding directly to carb or fuel rail but not aux tank to main tank...
__________________
2015 Ford F350 DRW 6.7 Diesel XL
2020 Avalanche 313 RS
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02-09-2021, 05:02 AM
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#37
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Senior Member
Join Date: Oct 2014
Location: Germantown, TN
Posts: 6,331
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I had given some thought about bringing attention to his statement also. I believe we are talking commercial as was suggested. And "If you are the cause of a fire in an accident you probably will be liable"I might add if anything happens, lane change without looking for example, if it's your fault then you're liable.
"Hello Geico? It's Jim again...."
__________________
Jim in Memphis, Wife of 51 years is Brenda
2019 F450 6.7 Powerstroke
2018 Mobile Suites 40RSSA
2021 40' Jayco Eagle
2001 Road king w/matching Harley sidecar
2021 Yamaha X2 Wolverine 1000
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02-12-2021, 03:59 AM
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#38
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Junior Member
Join Date: Dec 2020
Location: Branford
Posts: 27
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Quote:
Originally Posted by xrated
And then, there is this one. I just bought this one to replace an old 42 gallon steel tank. This one is 60 gallon and only 16 1/2" tall at the top of the tank, so below the top of the bed rails. And the "L" shaped area is low enough that my crossbed Toolbox will sit right over the top of the horizontal area of the tank. I don't know how you would calculate the weight distribution with this.....but then again, I really don't care with having a Dually.
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I have the same AUX tank (from RDS in Perry, FL) and my Weather Guard toolbox fits perfectly. The additional diesel capacity allows for fewer fuel stops and ability to 'shop' for the lowest diesel prices along my route(s). Those $300+ refills (truck plus AUX tank) aren't a lot of fun though...
I also installed a fuel pump with hose and nozzle that is mounted in the right side of the toolbox and pickup tube plumbed into the AUX tank. It's hidden from view, and I can easily refill my tractor, bobcat, and home diesel generator (MEP-803A) as needed. My AUX tank is also plumbed into my main fuel tank and is equipped with a shut-off valve if I need to have off-road diesel fuel in the AUX tank to refuel the farm equipment instead of the truck. (Off-road diesel is approx. .40-.50 a gallon less than regular taxed diesel in my area.) Don't get caught with off-road diesel in the AUX tank and the shut-off valve OPEN and feeding the main fuel tank in your truck! Been told it could be up to a $1K fine or $10 per gallon of off-road diesel in the tank (in FL...) if convicted.
Bottom line, if you don't have an AUX tank installed in the bed of your truck, GET ONE! You'll be glad you did...
__________________
Jack in Dixie
2021 Ram 3500 Big Horn, Crew Cab, Long Bed, 4x4, DRW, Cummins HO TD 6.7L
2021 Keystone Cougar Half-Ton 29RKS
Branford, FL
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02-12-2021, 10:01 AM
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#39
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Member
Join Date: Aug 2018
Location: Visalia
Posts: 88
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Quote:
Originally Posted by jasin1
I like the gravity setup but am a little Leary of drilling a hole in the fill tube. 2018-2020 Rams have the cp4 fuel injection pump and when it fails it sends shrapnel into the entire fuel delivery system.Ram sometimes replaces the entire system(super expensive) or tries to blame the owner saying bad fuel caused the problem. They may try and say metal from drilling or debris from aux tank is getting into the pump to deny warranty.It’s a known problem with cp4 pumps.Ram has since reverted back to the cp3 pump that it had for all the years prior and now for 2021 going forward.
It’s gonna be a pain but I may go with the tank/toolbox combo with a pump under the cover. I have a 50 gallon factory tank so that helps.I will just have to transfer fuel at rest stops.
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Does my 2017 Ram 3500 have that pump?
__________________
Randy & Shana Visalia, CA area
2019 Keystone Alpine 3700FL
2017 Ram 3500 Dually
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02-12-2021, 12:25 PM
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#40
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Senior Member
Join Date: Aug 2020
Location: Upper Chesapeake Bay
Posts: 4,836
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Quote:
Originally Posted by rbrdriver
Does my 2017 Ram 3500 have that pump?
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I believe it was only 2019-2020
__________________
2020 Cougar 315 RLS
2020 Ram 3500 6.7HO 4.10 Dually Aisin
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