1950 cub won't start

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Glen
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Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
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Location: Wa.

Re: 1950 cub won't start

Postby Glen » Tue May 18, 2021 10:25 pm

Hi,
Farmer Dell, a 1953 Cub would usually have a Battery Ignition unit, not a magneto. But it could have a magneto, either one was available.
In one of your posts from 2019 you said you downloaded the Cub owner's manual, it has pics of both systems, if it a manual from around 1953.

Below are pages from the 1955 Cub operator's manual showing the magneto, and the Battery Ignition unit.
There are small pics of the ignition wire routing for both. The pics are dark, I don't know if you can see them.

http://farmallcub.com/rudi_cub/www.clea ... age-28.jpg

http://farmallcub.com/rudi_cub/www.clea ... age-31.jpg

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Farmer Dell
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Joined: Sat Sep 14, 2019 10:53 am
Zip Code: 21666
eBay ID: US-Rol
Tractors Owned: 1953 Farmall Cub

1960 Economy Jim Dandy (sold)
1964 John Deere 110
1980 John Deere 108 (sold)
Twitter ID: @ChaplainDell
Location: Kent Island, MD.

Re: 1950 cub won't start

Postby Farmer Dell » Wed May 26, 2021 7:26 am

The "F" & "L" (Red and Black) seem to be backwards on the battery, is this normal?
It looks to me that the original battery was installed backwards, in that the Red wire goes to ground and the Black to the starter?
The F & L labeling is confusing to me, perhaps I just need to flip the battery around?

Waif
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Re: 1950 cub won't start

Postby Waif » Wed May 26, 2021 8:43 am

Farmer Dell wrote:The "F" & "L" (Red and Black) seem to be backwards on the battery, is this normal?
It looks to me that the original battery was installed backwards, in that the Red wire goes to ground and the Black to the starter?
The F & L labeling is confusing to me, perhaps I just need to flip the battery around?


For a positive ground , ignore cable color(for now ) and be sure shorter cable from positive terminal ( + ) on battery goes to ground on the tractor.
Negative (_) terminal gets long cable to starter switch.
(We can't see your cable color , and don't know what color was used prior. Someone needed a better cable , they could have grabbed anything.)

If you need to rotate battery for a cable to reach where it should , rotate it then.

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Glen
10+ Years
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Posts: 5512
Joined: Mon Mar 19, 2012 7:33 pm
Zip Code: 00000
Tractors Owned: 1956 Farmall Cub with Fast Hitch, F-11 plow, Disc, Cultivator, Cub-22 mower
Circle of Safety: Y
Location: Wa.

Re: 1950 cub won't start

Postby Glen » Wed May 26, 2021 6:48 pm

Hi,
Cubs made before mid 1964 are 6 volts, with positive ground.
The negative cable goes to the starter, and the positive cable to ground.

I don't know what F and L you are talking about.

The posts on a battery are positive and negative.

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Farmer Dell
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Joined: Sat Sep 14, 2019 10:53 am
Zip Code: 21666
eBay ID: US-Rol
Tractors Owned: 1953 Farmall Cub

1960 Economy Jim Dandy (sold)
1964 John Deere 110
1980 John Deere 108 (sold)
Twitter ID: @ChaplainDell
Location: Kent Island, MD.

Re: 1950 cub won't start

Postby Farmer Dell » Thu May 27, 2021 7:32 am

Thank you friends, I'm fairly sure I have a broken (Cut) wire someplace, I was encouraged to start another thread called 1953 cub won't start...
The wiring schematics in the service manual is labeled F & L, possibly meaning Load and Feed - but that's just my guess? The old wires appear white with a cloth covering from the negative terminal.

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Greenthumbfarms
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1950 Farmall Cub (Georgette)
1956 Farmall 230 (Gladys)
1959 Farmall 240 Utility (Heather)
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Re: 1950 cub won't start

Postby Greenthumbfarms » Sat May 29, 2021 2:28 pm

Re-adjusted the valves, some were pretty far out of adjustment, made up a new fuel line, and put new plugs in (gapped at .023). Still no luck. Looks like ill winch it into the trailer, and if we have a chance at the bash we can take a look at it. It obviously needs something else done that i'm missing
Member with Will County Threshermans Association.
60th Annual Will County Threshermans gas and steam tractor show July 21-24, 2022
https://www.steamshow.org/

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Dale Finch
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Re: 1950 cub won't start

Postby Dale Finch » Sat May 29, 2021 2:58 pm

Load that puppy up! See you at the Bash!!
Dale Finch
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Farmer Dell
Posts: 33
Joined: Sat Sep 14, 2019 10:53 am
Zip Code: 21666
eBay ID: US-Rol
Tractors Owned: 1953 Farmall Cub

1960 Economy Jim Dandy (sold)
1964 John Deere 110
1980 John Deere 108 (sold)
Twitter ID: @ChaplainDell
Location: Kent Island, MD.

Re: 1950 cub won't start

Postby Farmer Dell » Wed Jun 16, 2021 5:51 am

Fortunately, my neighbor is used to troubleshooting wiring and putting in distributor caps and the likes. He put in the new plugs and wires, and even rebuilt the carburetor for me. I found the issue, it was a cracked and corroded wire to the Ignition Coil, I skinned it back and re-sleeved it.
wire fix.jpg
and she's running great, thanks! :thanx:


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