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Super A light switch.

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Brian.

06-20-2003 20:18:18




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I'm in the process of putting on some new 6volt utility lights, using Bob M's diagram and have a few questions. What are the first two positions for, and second, what are the last two for. I have observed that the first two seem to be a low and a high current ( for charging ? ) and the last two seem to be low and high for the lights. My question is why ?

I'm sure the answer is in the archieves, but I can't seem to be able to do any searches today.

Thanks,
Brian
Toronto.

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Bob M

06-21-2003 07:41:50




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 Re: Super A light switch. in reply to Brian., 06-20-2003 20:18:18  
Brian - the logic for providing Bright/Dim settings for the front lights has baffled me for years! Even in the Bright setting the OEM 6 volts lights don't throw much light. I submit it would have been for IHC to have labeled the two switch positions "Dim" and "Dimmer"...



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Brian

06-21-2003 08:01:31




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 Re: Re: Super A light switch. in reply to Bob M, 06-21-2003 07:41:50  
Thanks for all your replies !
Now I have a one more question: How do you know if you are overcharging your battery ? In the summer I only use this tractor for mowing, and there is really no draw off the battery other than initial start using the starter ( I have mag. ign.). In the winter, when I hope to be snow plowing, I will be using 3 lights. Would it be a good idea then for me to keep the switch in the low charge setting when I don't have any draw, and the high setting when I do ?

Thanks again !

Oh and PS.
I got the old light to work, however they are quite dirty and even after trying to clean, they don't throw nearly as much light as the new 6 volt utility lights I picked up for 20.00 buck at Canadian Tire. I also feel alot better using these new lights since it would be very $$$ to replace the originals if they were to get smashed. I am quite happy with the amount of light these things throw out, it's not like the 12 volt lights on cars today, but is very good considering it's a 50+ year old system. I would not want to have to drive a vehicle with them though !

Thanks again,
Brian.

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Bob M

06-21-2003 08:40:49




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 Re: Re: Re: Super A light switch. in reply to Brian, 06-21-2003 08:01:31  
Yeah - the aftermarket 6 volt seal beam utility lights throw a lot more light than the original lights. I've stuck 'em on both my tractors for the same reasons as you.

As for controlling the charge rate, the light switch automatically puts the system into high charge mode in both the "D" and "B" (lights on) positions. For when you don't use the lights, I recommend keeping the switch at "H" if the tractor is gonna be run less than 10 - 15 minutes between starts, or whenever the temperature is below freezing. However for longer runs in warm weather, set the switch to "L" so as not overcharge the battery.

A couple ways to tell if the battery is being overcharged: If you have an accurate voltmeter stick it across the battery with the engine running at speed. A reading higher than about 7.4 says it's being overcharged. Or if you don't have a voltmeter simply unscrew a cell cap and have a look at the electrolyte. If you see lots bubbles it's overcharging. (A few scattered bubbles however are normal...)

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Haas

06-21-2003 05:28:02




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 Re: Super A light switch. in reply to Brian., 06-20-2003 20:18:18  
Positions are low charge, high charge, dim and bright, as you observed. The low and high charge only mean anything if you still have a cutout relay on your generator instead of a regulator. On older tractors with the cutout, you manually regulated the charging rate. On high charge, the field connection of the generator is just grounded, giving maximum charge rate. On low charge, a resistor is in the circuit between the generator field connection and the ground, giving a lower charge rate. With a voltage regulator, the charge rate is automatically adjusted by the regulator and the low and high charge positions on the switch are just the same as an "off" position. Also, the manual regulation of the charging rate does not work very well. It's difficult to know where to set the charge rate, often leading to over or undercharging the battery with shortened battery life.

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Farmer Bob

06-20-2003 21:16:56




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 Re: Super A light switch. in reply to Brian., 06-20-2003 20:18:18  
You have observed correctly. As to the why question, my guess is that the IH engineers thought of giving the operator options as to charging rate and high or low beam headlights. (If you have also observed, the rear work light does not change to lower illumination when the headlights are switched to low (Dim)setting.) The four position switch was used on tractors with a voltage cutout instead of a voltage regulator. The tractors with the three position switch were equipped with a real voltage regulator and the switch basically just controlled the lights - Off:Dim:Bright.

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