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Author  [Modern View]

11-20-2021 13:46:04

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I'm looking for 12 volt conversion with alternator for a TE20, I can't seem to find a good. I would greatly appreciate it. My serial number is TE 57826, I think it is 1948, but a little confused because on Tractor Data last serial number is 48000. Thanks for you help in advance.

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Terry G

11-28-2021 09:08:50

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 Re: TE20 12 VOLT CONVERSION in reply to ardie66, 11-20-2021 13:46:04  
I found this 6 volt alternator. Same as a Delco 10si complete with wide pulley. I did have to fabricate the mounting brackets. Has been working perfect for a couple of years. I could not keep a voltage regulator working on my TO20. This eliminated that problem. If you have to have 12 volt its available in that too.

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11-22-2021 19:53:24

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 Re: TE20 12 VOLT CONVERSION in reply to ardie66, 11-20-2021 13:46:04  
Quoting Removed, click Modern View to see

TE-20 production officially ended mid 1948 at serial number 48000 but the Continental motor could be ordered until at least 1950. So you likely have a relatively rare TE-20 made in the second half of 48.

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11-22-2021 19:26:29

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 Re: TE20 12 VOLT CONVERSION in reply to ardie66, 11-20-2021 13:46:04  
I assume you want to go with an alternator when you do the conversion.

The most common and economical alternator is a Delco 10SI 'one wire'. The one wire is just what it says, only one wire to connect.

You can probably buy a mount bracket, or if you're handy, make a better one. The aftermarket brackets are usually not the best, and you need a good, solid, straight mount. Also will need to buy a wide pulley for the alternator to match the wide pulleys on the engine. You can sometimes use the original generator pulley if it will fit.

As for the wiring, I have never seen a premade wiring harness, or even a wiring diagram for an alternator conversion. Eliminating the generator/regulator wiring simplifies the whole story. All the generator and regulator wiring is eliminated. If your wiring is still good, the old charging system wiring can be trimmed away or taped out of sight.

The 'one wire' from the alternator simply attaches to the positive battery cable, usually at the starter contactor to keep it away from the corrosive battery.

The system will need to be changed to negative ground if it's not already.

There will need to be a 1 1/2 ohm resistor added to the ignition coil circuit. Any lamps or accessories will need to be changed to 12v.

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Duner Wi

11-20-2021 15:35:54

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 Re: TE20 12 VOLT CONVERSION in reply to ardie66, 11-20-2021 13:46:04  
This site research and info /serial numbers says this.
Ferguson Model TE/TEA-20
Year Starting Serial Number
1946 1
1947 316
1948 20895
1949 77773
1950 116462
1951 167837
1952 241336
1953 310780
1954 367999
1955 428093
1956 488579

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