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Fuel tank sending unit.

Posted By Richard Wednesday, January 02, 2019 10:44 AM
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Richard
 Posted Wednesday, January 02, 2019 10:44 AM
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Please don't laugh too loud at the following: I recently bought a 33 gal round fuel tank for my 1971 Dodge D300 with a 383 V8 that loves gasoline. The in cab 15 gal. tank doesn't get me very far. I bought the tank, brackets, straps --the works for less than 25% of a new one. It was a take-off from a Hino, I was told, because the Hino was ordered with a square 50 gal tank and was delivered with a 33gal tank. Anyway, the tank was in a warehouse for some time and is in excellent condition, although it had some rather stale gas in it. OK my question. --the fuel sensor has one connector, but it has THREE male pins inside the connector. Can anyone ID what the three are for --I would like to find how the fuel gauge is connected so I can read the OHMS and with luck, find an add-on gauge that is compatible with the Hino tank. These round 33 gal tanks were very common on Isuzu trucks a few years ago. I have already mounted the tank on the frame, under the flatbed--perfect fit as it is about 15in in diameter and about 43in long. Thanks R

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Geoff Weeks
 Posted Wednesday, January 02, 2019 11:44 AM
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Could be many things, Gauge feed, ground and low fuel light, or in tank fuel pump would be my 1st guess.
My advice is to pull the unit out and find out what connects where.
Wednesday, January 02, 2019 11:45 AM by Geoff Weeks
Richard
 Posted Wednesday, January 02, 2019 1:46 PM
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Forgot to mention It is the fuel gauge sending unit as I can see the float. The tank also has two side-by-side outlet/inlet pipes for 3/8 hose. i can also see the pipes in the tank. I figure one is pickup and one return. They both seem to be the same length inside the tank, but one has a "filter" or??at its end . Going to start with the assumption that one is the pickup. No fuel pump in the tank. Geoff --good lead as to what the three connectors are for. Makes sense. Maybe I should read the resistance (OHMs), one pin at a time while I hook on to the float and pull it up. I always try to work things out by removing as few pieces as possible!

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junkmandan
 Posted Wednesday, January 09, 2019 2:35 PM
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Cured ?
Richard
 Posted Thursday, January 10, 2019 1:45 PM
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Haven't really attacked the problem yet. Got more pressing things to work on (Model A steering) and with cold weather, my work hours in the barns are short. I will get to hooking up the new tank in due course. There is a 3 way valve in the Dodge, left over from the original aux. tank I removed in 2003. However, the valve is junk, so a new 3 way and fuel line ought to do it. I may not have the gauge thing fixed, but I'll have about 25 extra gals. of gas. That will get me to Macungie with ease!! And speaking of gas, got some today for $1.99/gal. Never thought I'd see that again.

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junkmandan
 Posted Thursday, January 10, 2019 3:37 PM
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It's been down to a buck 75 or less about 2 weeks ago , under 2 bucks here as well .

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