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05-26-2024, 08:21 PM | #1 |
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Location: Melbourne Australia
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1937 Ford Coupe - Fuel sending unit
Hey guys,
I had the sending unit replaced when the car was in the US and now here in Australia, its not working properly. I'm not sure of the brand. It would only move from empty to half a tank (half a tank when full). Pulled the unit and checked its movement and even when moved to its extremes (cam movement) its ohm range wont move close enough to 0 to show a full tank. When grounding the fuel gauge shoots up to full. Can someone here please advise of a decent unit that works with the original gauge? 6v. Also, what ohm range I should be looking at. |
05-26-2024, 09:40 PM | #2 |
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Re: 1937 Ford Coupe - Fuel sending unit
Old gauge new sender apples and oranges. The original sender should have been cleaned and fitted with a new float. Doing the best with what you have, adjust the float arm to read zero accurately, and live with that.
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05-26-2024, 11:06 PM | #3 | |
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Re: 1937 Ford Coupe - Fuel sending unit
Quote:
Yeah, unfortunately I had no say in the installation of the replacement unit and this new unit wont go to zero no matter how hard we try, making it pretty useless. |
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05-26-2024, 11:34 PM | #4 |
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Re: 1937 Ford Coupe - Fuel sending unit
This is what an original sending unit looks like.
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
05-27-2024, 01:09 AM | #5 |
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Re: 1937 Ford Coupe - Fuel sending unit
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05-27-2024, 01:28 AM | #6 |
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Re: 1937 Ford Coupe - Fuel sending unit
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The only thing nice about being imperfect is the joy it brings to others.... "Silver rings, your butt! Them's washers!" "We shot our way out of that town for a dollar's worth of steel holes!" - from 'The Wild Bunch' - 1969 https://www.youtube.com/watch?v=7NReUd2_0u0 |
05-27-2024, 01:30 AM | #7 |
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Re: 1937 Ford Coupe - Fuel sending unit
That horizontal rod has a bent section that acts as a cam and pulls the brass centre in or out adjusting the ohms. The max movement up or down wont allow the change on ohms to meet whats required to get to a full tank (or close to 0 ohms).
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05-27-2024, 02:47 AM | #8 |
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Re: 1937 Ford Coupe - Fuel sending unit
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05-27-2024, 10:32 AM | #9 |
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Re: 1937 Ford Coupe - Fuel sending unit
The King - Seely sending unit shown in the photo does not operate on the Ohms Law principle and must be used with an original King-Seely fuel gauge. You can remove the lid from the unit and turn the star wheel to fine tune the adjustment with the OEM gauge. You may also have to bend the float arm. Also, make sure the brass float is not cracked causing it to fill up with gas. Read all this including the links. You have to have the patience of a toothache when working with your sending unit as it's a tedious process.
https://www.fordbarn.com/forum/showt...k+sending+unit and https://www.fordbarn.com/forum/showt...k+sending+unit https://www.fordbarn.com/forum/showt...k+sending+unit and https://www.fordbarn.com/forum/showt...ng+unit&page=2 and https://www.fordbarn.com/forum/showt...k+sending+unit Last edited by 19Fordy; 05-27-2024 at 10:44 AM. |
05-27-2024, 10:48 AM | #10 |
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Re: 1937 Ford Coupe - Fuel sending unit
All 36-55 Ford sending units are the same, with different arms crimped on. You can carefully remove the arm and swap a different one (or make a new one if necessary) on if the sender is working properly.
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05-27-2024, 08:41 PM | #11 | |
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Re: 1937 Ford Coupe - Fuel sending unit
Quote:
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