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1948 - 1956 F1, F100 & Larger F-Series Trucks Discuss the Fat Fendered and Classic Ford Trucks

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Old 08-06-2013, 12:23 AM
OKC54f100 OKC54f100 is offline
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Battery not receiving a charge

So let me say this first. I am not a mechanic or anything close to it. I do however take pride in trying to do things myself. So my problem is this. I have a 1954 Ford f100 that has a 292 Y Block in it freshly rebuilt. I put in a new voltage regulator (12v) and a new Battery. I have also hooked up 2 different Generators and I am getting the same thing which is my battery going dead after several starts. Once again I am not a mechanic so I would like to know of maybe something I could do or have done to find out what is causing this. I have also read several other threads about this subject or similar to it and it is way over my head. I need extremely simple.


any info will help thanks.
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Old 08-06-2013, 11:25 AM
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OKC

Is the starting draining the battery or the time between? Will the battery start the truck after it is connected but not used for a few days?

DW
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Old 08-06-2013, 11:55 AM
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OKC,

When you install a generator, usually you have to flash the field to get the generator to generate for the first time that you use it.

I don't have a manual for a 54, but there are two common ways to do this. One, with the engine running, you provide power to the field lead for a couple of seconds...by jumpering a wire directly from the battery to the field lead. If your 54 is 12v negative ground, you would jump from the battery positive to the "F" connection on the generator.

You do this because when generators are unhooked and stored, the iron magnets lose their magnetism. Those magnets are augmented by wire windings around them (an electro-magnet) which strengthen the magnetic field inside the generator. In everyday use, the windings create enough magnetism around the iron cores to leave them magnetized...weakly, but enough residual magnetism will be there to energize the generator when you start turning it (i.e. running the engine).

The other method is to motorize the generator by removing the belt and, depending on what schematic your shop manual provides, you usually power the "BAT" terminal and ground the "F" terminal on the generator. It should turn like a motor. The same thing happens to the iron cores...they become magnetized.

I prefer the flashing the field approach because you can hook a multi-meter to the battery and watch the battery voltage when the generator starts generating.

If you do the running engine flash-the-field approach, you should have the engine running at a high idle...enough for the generator to be charging. Generators don't work very well at low RPM settings. If it works, you should see static battery voltage at the battery (something like 12 to 13 volts). When the generator comes on line the voltage will go higher. After you detach your jumper lead (since you only held it there for a few seconds), the battery should slowly climb to regulated voltage (should be around 13.5 volts).

Dan
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Old 08-06-2013, 12:32 PM
OKC54f100 OKC54f100 is offline
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Quote:
Originally Posted by old_dan View Post
OKC,

When you install a generator, usually you have to flash the field to get the generator to generate for the first time that you use it.

I don't have a manual for a 54, but there are two common ways to do this. One, with the engine running, you provide power to the field lead for a couple of seconds...by jumpering a wire directly from the battery to the field lead. If your 54 is 12v negative ground, you would jump from the battery positive to the "F" connection on the generator.

You do this because when generators are unhooked and stored, the iron magnets lose their magnetism. Those magnets are augmented by wire windings around them (an electro-magnet) which strengthen the magnetic field inside the generator. In everyday use, the windings create enough magnetism around the iron cores to leave them magnetized...weakly, but enough residual magnetism will be there to energize the generator when you start turning it (i.e. running the engine).

The other method is to motorize the generator by removing the belt and, depending on what schematic your shop manual provides, you usually power the "BAT" terminal and ground the "F" terminal on the generator. It should turn like a motor. The same thing happens to the iron cores...they become magnetized.

I prefer the flashing the field approach because you can hook a multi-meter to the battery and watch the battery voltage when the generator starts generating.

If you do the running engine flash-the-field approach, you should have the engine running at a high idle...enough for the generator to be charging. Generators don't work very well at low RPM settings. If it works, you should see static battery voltage at the battery (something like 12 to 13 volts). When the generator comes on line the voltage will go higher. After you detach your jumper lead (since you only held it there for a few seconds), the battery should slowly climb to regulated voltage (should be around 13.5 volts).

Dan
Thanks for taking the time to write that out. I will give this a try and let you know the results.
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Old 08-06-2013, 12:33 PM
OKC54f100 OKC54f100 is offline
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Quote:
Originally Posted by FortyNiner View Post
OKC

Is the starting draining the battery or the time between? Will the battery start the truck after it is connected but not used for a few days?

DW
Starting the truck is what is draining the battery.
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Old 08-06-2013, 12:33 PM
 
 
 
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