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Harry Ferguson Tractors Discussion Forum
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TO-30 BATTERY NOT CHARGING

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guyeli

04-05-2006 16:10:23




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Hi fellow Fergy enthusiasts,am seeking knowledge re/my 6 volt system and its inability to charge my battery.Let me explain that I have re-built the original generator last Sept.Also replaced the voltage regulator and took great pains to polarize the system per instructions from this web site.My tractor started fine at first,but slowly seemed to lose its umph.My guess is the newly re-charged battery finally petered out.Bought another battery thinking the old one was defective only to have the whole process repeat itself.Obviously I need to take a step by step approach in order to identify the problem in my system.I am seeking a thorough and comprehensive approach to repairing this issue once and for all.Any advice would be a Godsend.THANKS.

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zippy4554

04-06-2006 10:03:50




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 my guess, its the new regulator in reply to guyeli, 04-05-2006 16:10:23  
I have purchased 3 of these 6 volt regulators. All three worked for awhile, and then fail to allow for a charge. I did improve their performance for awhile by slightly opening up the gap on the points (the set on the small wire winding).
This helped for awhile, actually they tended to charge too much, then after a couple weeks they'd be down to nothing again.

So I went back to the old regulator which had been subject to reversed polarity for years. ..I figured it had been fried. And that one works fine, allows big charge after starting, then drops back to 1-2 amps (I have an ammeter installed).

So I have had no luck with the new ones. Do confirm as others have described if the generator can provide a charge by grounding the field terminal.

If so, I'd look for a used one.

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gshadel

04-06-2006 08:00:35




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 Re: TO-30 BATTERY NOT CHARGING in reply to guyeli, 04-05-2006 16:10:23  
guy...
do a search for "charging" above. Several of us have left posts on this very subject on many occasions.

All your wire connections need to be clean and shiny. 6V systems just don't work with corrosion. Check the ground (positive) to frame on the back of the dash - gotta be clean!. Check the regulator ground lug - it is one of the regulator mounting bolts. It needs to be clean or the regulator won't ground to the tractor frame very well, and won't allow the genny to put out as it should. Might want to polarize the generator one more time after cleaning wire connections to make sure the polarization takes.

The regulator controls generator output by varying the resistance to ground of the "F" field terminal on the generator. No ground = no output. Try this (after cleaning your wire connections and re-polarizing) - run a jumper wire from a good ground, like the dash connection, to the "F" terminal on the genny, while your engine is running at working speed. Look at your AMP gauge when you do that. The AMP gauge should come to life and ramp-up to ~10-12 AMPS, which is ~full output from the generator. If that works, your generator works, but your regulator isn't working right. If the AMP gauge don't move, either the gauge is bad, or the generator is bad. Volt meter will help verify that. When you do the jumper test, you should get ~6.8 - 7.2 volts across the battery terminals. Shut off the engine, the volts will drop. If you get no voltage change, generator ain't working. Even a cheapo volt meter from Wallmart should work good enough to check that. Run those tests and get back to us.

George

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Jeff-oh

04-06-2006 05:26:18




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 Re: TO-30 BATTERY NOT CHARGING in reply to guyeli, 04-05-2006 16:10:23  
Guyeli,

Jerry/MT has written a very comprehensive three part article on trouble shooting Ferguson electrical systems. His articles are being published right now in the Ferguson Furrows, The newsletter of the Ferguson Enthusiasts of North America club.

Though I am not well versed in the electrical system, thus, I cannot help here directly, I found his articles easy to follow.

Jeff

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phil(va)

04-05-2006 22:01:49




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 Re: TO-30 BATTERY NOT CHARGING in reply to guyeli, 04-05-2006 16:10:23  
What is the voltage reading at the battery while the tractor is running? Does the battery lose charge while running? Does it lose charge while not running? What does the ammeter show while running? Is all the wiring good, ie., not cracked or broken and with good connections?



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guyeli

04-06-2006 05:38:52




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 Re: TO-30 BATTERY NOT CHARGING in reply to phil(va), 04-05-2006 22:01:49  
I guess I need to get some kind of voltmeter to answer these questions.What kind should I look for?The ammeter needle generally stays at "0" on the meter when engine is running,but when starting it falls slightly below the "0" and to the left.when the ignition is on,but not engaging the starter it also is slightly below "0" and left of the"0".



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phil(va)

04-06-2006 17:07:09




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 Re: TO-30 BATTERY NOT CHARGING in reply to guyeli, 04-06-2006 05:38:52  
A cheap $10 voltmeter/ohmeter from Harbour Freight or one of those places will get you started. You can pay more and get a better one if you like, but those work. You should have about 7 volts across the battery when it is running at about 1500 rpm if it is charging properly. Normally the ammeter will show from 1 to 5 positive amps when running, after it has been running for a minute or so, and it should never be negative in that situation. However, it is normal for it to show negative briefly when starting.

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guyeli

04-07-2006 09:31:54




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 Re: TO-30 BATTERY NOT CHARGING in reply to phil(va), 04-06-2006 17:07:09  
O.K. so I will get the voltmeter today and place it on the battery,my guess is that it will indicate no charge or current entering the battery.What's my next step?



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phil(va)

04-08-2006 05:11:59




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 Re: TO-30 BATTERY NOT CHARGING in reply to guyeli, 04-07-2006 09:31:54  
Good charged battery at rest, engine off, normally will read about 6.25 volts. Battery being charged by engine at about 1500 rpms normally will read approximately 6.8 - 7.2 volts. If that isn"t close to what you get, look at the suggestions you already have received (above) for researching the problem. There is a test to determine if it is the VR, and I believe someone already mentioned that, but if none of that helps, please post back and we"ll work on it further.

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