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Sorry, I mixed them up. Yes, the harpoon mod, with the Aft axle tank I cant reach the tube.
Then for the hutch mod from the bottom of the tank to the top of the tank is 13.5 in. I have the bottom of the tube sitting around 12 7/8-13in in length. is that .5-.75 in a big deal on where the pickup should be?
It's not really doable on that type of tank. Takes the patience of a saint but I can overfill the stock aft-axle tank on mine if I really need to, which, most of the time I don't and just fill it till the pump clicks off.
Perhaps the hutch mod could be skipped if the screens are checked on an interval and the pickup foot is changed on that same interval. But, the harpoon mod corrects an aspect of the fuel tank that is/was not working as designed or intended in my opinion.
Even with a 29 gallon tank, the fill port would literally puke fuel out of it so far that I would stand with my back against the truck and to the side waiting for it to happen. This was in an effort to keep my clothes from not smelling like diesel fuel.
After the inevitable puking session, the tank would need to be topped off at a trickle flow rate. Perhaps my truck was a puke monster and others have a better experience. But I have zero regrets about doing the H/H mods.
If this is how it was designed and intended to be, then shame on Ford.
I'm surprised you haven't installed a 50-60 gallon slip tank in the bed with the longer RV'ing trips you take. Almost all of the RV delivery guys use those...you just can't get far enough at 10-11 mpg with a 30-35 gallon stock fuel tank. Some of the newer long bed Ram and Ford trucks have 48-50 gallon stock tanks now...better but still not enough to run all day without fueling.
I'm surprised you haven't installed a 50-60 gallon slip tank in the bed with the longer RV'ing trips you take. Almost all of the RV delivery guys use those...you just can't get far enough at 10-11 mpg with a 30-35 gallon stock fuel tank. Some of the newer long bed Ram and Ford trucks have 48-50 gallon stock tanks now...better but still not enough to run all day without fueling.
I installed an aluminum 45 gallon auxiliary tank in the bed many years ago giving me ~75 gallons of diesel on board. I have a 12v pump on a monetary switch to transfer fuel from auxiliary tank to the OEM tank. I have a digital gauge to tell me the level of the auxiliary tank. I still get a kick out of filling up while going 65 MPH.
I generally get 11 - 13 MPG while towing the 5th wheel which puts me at ~800 mile range towing. I went the auxiliary bed tank method so I can move the tank to another truck if I ever need to. Even with a short bed and the tank in the back, space has never been a problem for us. The truck is a tow pig 90% of the time and a firewood hauler in the fall.
The tank sits below the bed rails so that a cover can be used. It is nice to have the cover and keep the cargo or firewood dry. Really, this perfect for us and our use of traveling long distances and cross country.
Dana is a reliable and readily available source for information on Dana axles, without having to resort to the risk of misinformation inherent with reader editable sites like Wikipedia.
I installed an aluminum 45 gallon auxiliary tank in the bed many years ago giving me ~75 gallons of diesel on board. I have a 12v pump on a monetary switch to transfer fuel from auxiliary tank to the OEM tank. I have a digital gauge to tell me the level of the auxiliary tank. I still get a kick out of filling up while going 65 MPH.
I generally get 11 - 13 MPG while towing the 5th wheel which puts me at ~800 mile range towing. I went the auxiliary bed tank method so I can move the tank to another truck if I ever need to. Even with a short bed and the tank in the back, space has never been a problem for us. The truck is a tow pig 90% of the time and a firewood hauler in the fall.
The tank sits below the bed rails so that a cover can be used. It is nice to have the cover and keep the cargo or firewood dry. Really, this perfect for us and our use of traveling long distances and cross country.
I’ll have to get info on that in the future when I get my tank. That sounds awesome!
Something was wrong with the puke monster. That is FAR from normal. Typically, the pump clicks off several gallons before FULL. This is by design as Y2K eluded to. This provides an adequate vapor space in the tank to prevent spills from overfilling - like I described in a post above.
While the ‘harpoon’ mod may be controversial, I take exception to Ford’s non-serviceable filters in the tank and I question the notion that recycling warm fuel mitigates more problems than recycling AIR creates. I’ve done this mod to sooooo many trucks over the years and have yet to observe a single negative impact. It’s also rare that I find the pickup foot/umbrella intact anymore. This plastic junk WILL FAIL in this service... I’m always looking for permanent solutions and don’t care if my customers never HAVE to come back - especially for something I already ‘fixed’. I prefer to spend their money on increased reliability and performance/fuel economy/etc.
I’ll have to get info on that in the future when I get my tank. That sounds awesome!
Below is a link to a thread I created in 2015 when I realized that I NEEDED more fuel capacity. The tank has been an absolute pleasure to use when traveling long distance. I can go from home to the beach (600 miles) towing heavy and not even worry about getting close to running out of fuel. I highly recommend auxiliary fuel tanks and the below the bed rails is just a bonus.
Something was wrong with the puke monster. That is FAR from normal. Typically, the pump clicks off several gallons before FULL. This is by design as Y2K eluded to. This provides an adequate vapor space in the tank to prevent spills from overfilling - like I described in a post above.
Well, I didn't think it was right and I was not going to tolerate it any longer after it happened a third time... I believe it was the foam and some fuel puking up out of the fill port due to agitation of the fuel while flowing into the tank. I didn't think the process was working as intended, which is why I selected my words carefully earlier.
Originally Posted by Sous
If this is how it was designed and intended to be, then shame on Ford.
I now fill until the pump turns off and I do not "squeeze" any more fuel into the tank after it shuts off. I move the fill nozzle to the auxiliary tank and go about my business there. I guess since I don't try to max out the tank I don't have overflow problems, not sure.
I have been working from home since covid and my work laptop took a crap so I am waiting on a new one...it has given me some extra time in the garage
I ended up redoing and lengthening the pick up tube and here are pics of the screen, they seem pretty damn bad. I was wondering though, how many of you guys end up having compression fitting issues 5,6,10,12 years down the line? Do they ever get lose or start leaking and sucking up air? Anyways, nothing of huge concern but more of a talking point.
@Y2KW57 That is a good check list and something I will probably do. Pulling it apart will also allow me to figure out if there are any other issues with the axle such as spun bearings on the spindle if they are that wasted.
I have done this mod many, many, many times. Cumulatively easily millions of miles on those trucks. Not one single issue. Most are still running the filter I installed. It’s not unusual to see the in tank screens in worse shape than yours!
Picture of my in tank screens when I removed them. The Racor PS120 has done an excellent job of a pre-pump filter, just like the OEM screens. But, I can check and clean the Racor in about 30 seconds if the need is there. I mounted my Racor up high and just behind the transfer case. Been there for 10's of thousands of miles some of which are on Forest Service roads and BLM land.
Ok, so I got my new filter in and everything buttoned up! I will post pics on that later.
anyways, I primed the fuel pump by doing the key on/off a few times and it won’t build more pressure then 20 psi. I assumed air is just trapped in the system so I turned it over for a second, it started and I was hoping to see pressure bump up to 60+ and it didn’t so I immediately killed it.
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