Battery Drain or not enough charge?

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Battery Drain or not enough charge?

Postby jljmonky » Thu Nov 03, 2016 2:04 pm

My 55 LoBoy had a great Halloween. We loaded up the hay rack with an estimated 2500 lbs or so of folks and we headed around town for the little people to trick or treat. After about 2 hours the lights started to dim and the engine chug then die and though the lights would come on it did not have enough power to start the tractor. I charged the battery at home and she fired right up.

thoughts? suggestions?

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Re: Battery Drain or not enough charge?

Postby ScottyD'sdad » Thu Nov 03, 2016 2:48 pm

Generator or regulator not allowing enough charge. Should maintain charge, with the lights on, unless theres a short, in the wiring circuit. Actual draw of power, to run the engine, is minimal.
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Matt Kirsch
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Re: Battery Drain or not enough charge?

Postby Matt Kirsch » Thu Nov 03, 2016 2:50 pm

The generator system on a Cub is barely adequate to keep up with the demands of running the lights when it is operating at 100% capacity. If the generator system is not 100% up to snuff, or not working at all, it will drain the battery.

Fire it up, turn on the lights, and look at the ammeter.

It should show a charge, meaning, the needle should be to the right of center. Even slightly to the right of center.

What does the ammeter show when the tractor is running with the lights off?

It is very likely that you were also not running at full throttle all the time. The generator's running at diminished output at lower RPMs.

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Re: Battery Drain or not enough charge?

Postby olgreyhair » Thu Nov 03, 2016 2:57 pm

My guess is not enough charge. My 52, barely puts out enough. I can run it for hours and the best the battery will do is 6.2 volts. Does anybody know if and how you can adjust the voltage regulator?

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Re: Battery Drain or not enough charge?

Postby ParlowMillFarm » Thu Nov 03, 2016 4:21 pm

check the tension on the belt.

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Re: Battery Drain or not enough charge?

Postby inairam » Wed Nov 09, 2016 7:26 am

after checking the belt here are a few thing I have done.

Led lights can help reduce the load. viewtopic.php?f=1&t=93914 These are options for 6v systems. There are many more options for 12 v systems.

There is a tab with a spring inside the regulator that can be bent to adjust the output of the regulator. I think the how to is covered in a post.

I personally have not had much luck with life of available electro mechanical regulators. I started looking into a solid state regulator ... regulator/ which comes on at any voltage above the battery instead of a set voltage like the electro mechanical. I have two installed on 6 volt systems and so far they are working well but it has only been one season. They fit inside the regulator body with some soldering if you want to keep the original look. They also tolerate a jump from a 12 volt battery and use a high power diode to ground the field terminal instead of a resister which I always find broken when I have a charging problem.
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