Hutch mod
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Tuned
Joined: Sep 2011
Posts: 399
Likes: 1
From: Ness city Kansas
Hutch mod
I am thinking on doing the hutch mod..... I start sucking air at about a 1/4 tank of diesel left? I do have a couple question what do you do to hook up the fuel lines to the top of the tank and the fuel pump since they are a quick disconnect type of deal more worried about the fuel pump side because on the fuel tank it looks like you can slip a piece of hose on the outlet of the tank
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Since I'm still running the stock fuel bowl I use this as a pre-pump filter.
Also available at Napa.
The fuel line connector at rear of pump is not the typical quick-connect. This is how to remove it from pump.
Don't forget the Harpoon Mod.
Also available at Napa.
The fuel line connector at rear of pump is not the typical quick-connect. This is how to remove it from pump.
Don't forget the Harpoon Mod.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
It's the quick disconnects that were allowing air into my fuel. When the tank is full, gravity prevents a vacuum in the fuel line. Once the fuel gets low, vacuum can build in the fuel line and Quick Disconnects with O-ring seals... well... suck... at sealing a vacuum - so air gets in. I replaced my fuel line with injector tubing compatable with diesel (if you buy something inexpensive, it's likely going to dissolve and/or collapse) and injector hose clamps (better clamping on hose). Many people believe air is sucking into the fuel pickup tube at 1/4 tank and this may happen sometimes, but my experience showed everything in my tank was fine and the QDs got me. I'm still glad I dropped the tank to do the Harpoon mod, remove the mixing chamber and filters, and divert the return away from the pickup.
I got all fancy with my pre-pump filter, but ultimately went with the filter similar to the one above because my big injectors already tax the fuel system enough... without my sabotage.
I got all fancy with my pre-pump filter, but ultimately went with the filter similar to the one above because my big injectors already tax the fuel system enough... without my sabotage.
Laughing Gas
Joined: Nov 2010
Posts: 1,193
Likes: 2
From: D.C. but heart's in TEXAS
if you're sucking air at 1/4 tank, you've likely got a broken pickup foot. You can order a new one from either Riff Raff or Diesel Orings. Or, if you do-it-yourself Hutch Mod parts...just buy a long enough steel tube to go down almost to the bottom of your tank. That's what I did...didn't realize the foot was broken until we had it down and open.
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Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
Aren't you all using 3/8 line to the fuel pump. If so, are you just clamping the line onto the 5/16 inch filter as above? Or am I missing something. I do need to do mine as well. Maybe next tech day so I can get some help. Thanks,
Chet
Chet
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Postmaster
Joined: Jun 2010
Posts: 2,555
Likes: 9
From: Longview, TX
The pickup line on the top of the foot is 3/8. The fuel pump is 5/16. There are a couple ways people deal with this. One is to install a barb reducer to size down the hose. Then there is the crowd that double clamp at the tank side of the filter, size down on the pump side to 5/16. Then some who use screw on style filters can use whatever size barb fittings they need for the inlet and outlets. And then I know one guy who used compression barb fittings on the pickup line and pump, so he just got the right size barb and kept that size all the way through.
Cargo Master
Joined: Mar 2008
Posts: 2,975
Likes: 19
From: Archdale,N.C.
I just went with this kit from Strictly Diesel,http://www.strictlydiesel.com/p-2662...-pump-kit.aspx they say you can build a kit yourself from scratch,but I like the one stop shopping thing. If the duck bill cracks like mine did you might run out at a quarter tank. The reason I went into my tank was I was running out of fuel at a quarter tank,and I was having power issues at high RPMs,come to find out my duck bill was cracked,my pick up foot was broken off,and my mixing screens looked like this...
And while I had it all apart..I modded my filler neck so I can fill up using the big nozzles at truckstops...
And while I had it all apart..I modded my filler neck so I can fill up using the big nozzles at truckstops...
Postmaster
Joined: Jun 2010
Posts: 2,555
Likes: 9
From: Longview, TX
Yes, it needs to be stopped before it gets to the pump. Let's back up and clarify. We aren't looking for a "filter," we want a strainer or screen. Just trying to grab the large chunks and particles to keep the pump safe. That is the purpose of the in-tank screens, but they are too difficult to service inside the tank. The second reason we are deleting the in-tank screens is to reroute the return line away from the pickup.
Senior User
Joined: May 2010
Posts: 407
Likes: 0
From: Southern IL
Is there any advantage or disadvantage to running the screw on type of filter/strainer vs the small type like Paysonpsd posted?
I really need to do this mod and it looks like the smaller type would help in the cost department.
I really need to do this mod and it looks like the smaller type would help in the cost department.