140 12v conversion

Farmall Super A, AV, 100, 130, & 140 1939 - 1973
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64' 140
Late 50s 140
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140 12v conversion

Postby jdeere86 » Thu Jan 06, 2022 7:18 pm

Hey everyone -

I have a 140 that I decided to convert. I bought a 63 Amp Delco Alternator. Single wire with built in regulator. New 12v coil and also a universal base bracket kit from yesterday’s tractors. I have the alternator mounted on the tractor however As it is now higher than the generator I can’t get the belt over the pulley - just barely. It’s a roughly 43.5” belt from my rough measurement. Question is should I try and mount it differently so the current belt fits or should I get a slightly longer belt if I can find one. I have another 140 that’s 12v which I’ll include a photo of how its alternator is mounted - through a different hole with different style bracket.

Thank you very much
New coil
New alternator mount
Alternator mount that works now

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Re: 140 12v conversion

Postby Eugene » Thu Jan 06, 2022 9:51 pm

I would purchase a longer belt.

Other option is to remove lower mounting bolt, tip the alternator to install the belt. Replace the bolt.
I have an excuse. CRS.

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Tractors Owned: 1948 6v - Dozer
1949 with kub klipper belly mower. mag 6v - Mom
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1953 54 blade, c22, wood 42 6v
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1965 lo-boy with c-3 mower 12 v - Loboy
1974 Horse II 12 v c-2
1975 with woods 42-6 12 v - Horse
1979 long strip 12 v stuck engine
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1969 140 with bush hog tow behind mower 12 v
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Re: 140 12v conversion

Postby inairam » Fri Jan 07, 2022 7:08 am

I used the same alternator on my 140. I could not get a universal bracket to fit properly nor anything from the a-130. The front flange on the engine is different than the C123 in the 130. I could not get the pulleys to line up. I have purchased two brackets from this seller on ebay and both fit well. https://www.ebay.com/itm/324912288780.

If the pulleys line up getting a new belt will be cheaper and faster as long as you are happy with the everything else of the current setup.
When you only have 9 horsepower you need to know the names of all of the ponies!

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