Super M battery drain

Farmall M, Super M, 400, 450 & 560 Tractors, 1939-1963

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mcwinter
5+ Years
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Joined: Mon May 17, 2010 8:53 pm
Zip Code: 61084
Tractors Owned: 1948 Cub SN 49182
1936 F-20 SN 62277
1939 Farmall A SN 1849
1953 Super M SN 41113 J
Farmall B
1974 Massey Ferguson 175 SN 9A195209
Location: IL, Stillman Valley

Super M battery drain

Postby mcwinter » Tue Jun 04, 2019 10:03 am

Looking for any tips in locating a short causing battery drain in my Super M. Looks like a good place to start would be the starter switch, which is a little dirty with some surface corrosion and I imagine could be causing some drain. Another wire from this connection I believe goes to the light/ignition switch box.

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Shane N.
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Zip Code: 00000
Tractors Owned: .
1970 International 140 (Norman)
1972 International 140 (Keeferdoodle)
1949 John Deere A
1993 Ford 4630 W/Loader
1965 John Deere 110
1961 Cub Cadet Original

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1947 Cub #1447 (Arnold)
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Location: N.C.

Re: Super M battery drain

Postby Shane N. » Tue Jun 04, 2019 10:05 am

Is it 12V? Does it have an alternator on it?
Every home is a school, what are you teaching?

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Eugene
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Re: Super M battery drain

Postby Eugene » Tue Jun 04, 2019 11:35 am

If the tractor has a generator and voltage regulator, probably the voltage regulator.

Disconnect the wiring from the B terminal on the regulator. Charge up the battery. Following morning, check battery condition and see if the tractor starts.
I have an excuse. CRS.

mcwinter
5+ Years
5+ Years
Posts: 25
Joined: Mon May 17, 2010 8:53 pm
Zip Code: 61084
Tractors Owned: 1948 Cub SN 49182
1936 F-20 SN 62277
1939 Farmall A SN 1849
1953 Super M SN 41113 J
Farmall B
1974 Massey Ferguson 175 SN 9A195209
Location: IL, Stillman Valley

Re: Super M battery drain

Postby mcwinter » Thu Jun 06, 2019 5:14 pm

Yes, 12V with regulator.

Eugene
Team Cub Mentor
Team Cub Mentor
Posts: 17772
Joined: Fri Jul 02, 2004 9:52 pm
Zip Code: 65051
Circle of Safety: Y
Location: Mo. Linn

Re: Super M battery drain

Postby Eugene » Thu Jun 06, 2019 7:49 pm

One more check. Disconnect one battery cable and fully charge. Connect ohm meter, ohms setting, between battery disconnected terminal and cable.

Check to see amperage drain. Disconnect the bat wire from the bat terminal on the regulator. Check the amp drain. If zero drain, regulator problem.

If you still see an amp drain, then disconnect one wire at a time until the drain goes away.
I have an excuse. CRS.


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